diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 06ff8cf2..fb4d5d76 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -8,9 +8,11 @@ We want to make contributing to this project as easy and transparent as possible
 - Proposing new features
 
 License
-=====================
-WAMR uses the permissive open source `Apache 2.0 license`_ that allows you to freely use, modify, distribute and sell your own products that include Apache 2.0 licensed software. 
-Any contributions you make will be under the same license. Feel free to contact the maintainers if that's a concern.
+=======
+WAMR uses the same license as LLVM: the `Apache 2.0 license` with the LLVM
+exception. See the LICENSE file for details. This license allows you to freely
+use, modify, distribute and sell your own products based on WAMR.
+Any contributions you make will be under the same license.
 
 Code changes
 ===================
diff --git a/LICENSE b/LICENSE
index 8f71f43f..9eb1032f 100644
--- a/LICENSE
+++ b/LICENSE
@@ -200,3 +200,20 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 
+
+--- LLVM Exceptions to the Apache 2.0 License ----
+
+As an exception, if, as a result of your compiling your source code, portions
+of this Software are embedded into an Object form of such source code, you
+may redistribute such embedded portions in such Object form without complying
+with the conditions of Sections 4(a), 4(b) and 4(d) of the License.
+
+In addition, if you combine or link compiled forms of this Software with
+software that is licensed under the GPLv2 ("Combined Software") and if a
+court of competent jurisdiction determines that the patent provision (Section
+3), the indemnity provision (Section 9) or other Section of the License
+conflicts with the conditions of the GPLv2, you may retroactively and
+prospectively choose to deem waived or otherwise exclude such Section(s) of
+the License, but only in their entirety and only with respect to the Combined
+Software.
+
diff --git a/README.md b/README.md
index a7383eb6..a023ef29 100644
--- a/README.md
+++ b/README.md
@@ -117,7 +117,12 @@ See the [roadmap](./doc/roadmap.md) to understand what major features are planed
 Please submit issues for any new feature request, or your plan for contributing new features.
 
 
-
+License
+=======
+WAMR uses the same license as LLVM: the `Apache 2.0 license` with the LLVM
+exception. See the LICENSE file for details. This license allows you to freely
+use, modify, distribute and sell your own products based on WAMR.
+Any contributions you make will be under the same license.
 
 
 Submit issues and contact the maintainers
diff --git a/core/app-mgr/app-manager/CMakeLists.txt b/core/app-mgr/app-manager/CMakeLists.txt
index ef2d49c9..920f748b 100644
--- a/core/app-mgr/app-manager/CMakeLists.txt
+++ b/core/app-mgr/app-manager/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 include_directories (.
                      include
diff --git a/core/app-mgr/app-manager/app_manager.c b/core/app-mgr/app-manager/app_manager.c
index b349191f..04628b16 100644
--- a/core/app-mgr/app-manager/app_manager.c
+++ b/core/app-mgr/app-manager/app_manager.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "app_manager.h"
diff --git a/core/app-mgr/app-manager/app_manager.h b/core/app-mgr/app-manager/app_manager.h
index b9fed73f..605ec741 100644
--- a/core/app-mgr/app-manager/app_manager.h
+++ b/core/app-mgr/app-manager/app_manager.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef APP_MANAGER_H
diff --git a/core/app-mgr/app-manager/app_manager_host.c b/core/app-mgr/app-manager/app_manager_host.c
index 509a3432..8e4b29cd 100644
--- a/core/app-mgr/app-manager/app_manager_host.c
+++ b/core/app-mgr/app-manager/app_manager_host.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_common.h"
diff --git a/core/app-mgr/app-manager/app_manager_host.h b/core/app-mgr/app-manager/app_manager_host.h
index 1d6b45c8..cc663725 100644
--- a/core/app-mgr/app-manager/app_manager_host.h
+++ b/core/app-mgr/app-manager/app_manager_host.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _APP_MANAGER_HOST_H_
diff --git a/core/app-mgr/app-manager/app_mgr.cmake b/core/app-mgr/app-manager/app_mgr.cmake
index a549f307..afd44134 100644
--- a/core/app-mgr/app-manager/app_mgr.cmake
+++ b/core/app-mgr/app-manager/app_mgr.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (__APP_MGR_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/app-mgr/app-manager/ble_msg.c b/core/app-mgr/app-manager/ble_msg.c
index 3a9da09c..3794fa56 100644
--- a/core/app-mgr/app-manager/ble_msg.c
+++ b/core/app-mgr/app-manager/ble_msg.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #if 0
diff --git a/core/app-mgr/app-manager/event.c b/core/app-mgr/app-manager/event.c
index 2295f20f..67def1c7 100644
--- a/core/app-mgr/app-manager/event.c
+++ b/core/app-mgr/app-manager/event.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <string.h>
diff --git a/core/app-mgr/app-manager/event.h b/core/app-mgr/app-manager/event.h
index 84742ada..a9c3de3b 100644
--- a/core/app-mgr/app-manager/event.h
+++ b/core/app-mgr/app-manager/event.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _EVENT_H_
diff --git a/core/app-mgr/app-manager/message.c b/core/app-mgr/app-manager/message.c
index 0bccaecc..8fc3ac51 100644
--- a/core/app-mgr/app-manager/message.c
+++ b/core/app-mgr/app-manager/message.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "app_manager.h"
diff --git a/core/app-mgr/app-manager/module_config.h b/core/app-mgr/app-manager/module_config.h
index 0899a027..b742fed3 100644
--- a/core/app-mgr/app-manager/module_config.h
+++ b/core/app-mgr/app-manager/module_config.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _MODULE_CONFIG_H_
diff --git a/core/app-mgr/app-manager/module_jeff.c b/core/app-mgr/app-manager/module_jeff.c
index 91e5770f..af2fbaef 100644
--- a/core/app-mgr/app-manager/module_jeff.c
+++ b/core/app-mgr/app-manager/module_jeff.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifdef ENABLE_JEFF
diff --git a/core/app-mgr/app-manager/module_jeff.h b/core/app-mgr/app-manager/module_jeff.h
index db396119..bb39f27e 100644
--- a/core/app-mgr/app-manager/module_jeff.h
+++ b/core/app-mgr/app-manager/module_jeff.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _MODULE_JEFF_H_
diff --git a/core/app-mgr/app-manager/module_utils.c b/core/app-mgr/app-manager/module_utils.c
index 36ad5426..44e486ed 100644
--- a/core/app-mgr/app-manager/module_utils.c
+++ b/core/app-mgr/app-manager/module_utils.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "app_manager.h"
diff --git a/core/app-mgr/app-manager/module_wasm_app.c b/core/app-mgr/app-manager/module_wasm_app.c
index 580e76fc..7fbe8a53 100644
--- a/core/app-mgr/app-manager/module_wasm_app.c
+++ b/core/app-mgr/app-manager/module_wasm_app.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "module_wasm_app.h"
diff --git a/core/app-mgr/app-manager/module_wasm_app.h b/core/app-mgr/app-manager/module_wasm_app.h
index 077af05e..e0f1296d 100644
--- a/core/app-mgr/app-manager/module_wasm_app.h
+++ b/core/app-mgr/app-manager/module_wasm_app.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _MODULE_WASM_APP_H_
diff --git a/core/app-mgr/app-manager/module_wasm_lib.c b/core/app-mgr/app-manager/module_wasm_lib.c
index f69e7a4c..bdf3215c 100644
--- a/core/app-mgr/app-manager/module_wasm_lib.c
+++ b/core/app-mgr/app-manager/module_wasm_lib.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 
diff --git a/core/app-mgr/app-manager/module_wasm_lib.h b/core/app-mgr/app-manager/module_wasm_lib.h
index 7482cddc..63ffd92b 100644
--- a/core/app-mgr/app-manager/module_wasm_lib.h
+++ b/core/app-mgr/app-manager/module_wasm_lib.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _MODULE_WASM_LIB_H_
diff --git a/core/app-mgr/app-manager/platform/linux/app_mgr_linux.c b/core/app-mgr/app-manager/platform/linux/app_mgr_linux.c
index cbfeb375..45957bc1 100644
--- a/core/app-mgr/app-manager/platform/linux/app_mgr_linux.c
+++ b/core/app-mgr/app-manager/platform/linux/app_mgr_linux.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "app_manager.h"
diff --git a/core/app-mgr/app-manager/platform/zephyr/app_mgr_zephyr.c b/core/app-mgr/app-manager/platform/zephyr/app_mgr_zephyr.c
index 074d359f..67ae69b4 100644
--- a/core/app-mgr/app-manager/platform/zephyr/app_mgr_zephyr.c
+++ b/core/app-mgr/app-manager/platform/zephyr/app_mgr_zephyr.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "app_manager.h"
diff --git a/core/app-mgr/app-manager/resource_reg.c b/core/app-mgr/app-manager/resource_reg.c
index 4fe477e3..a5802537 100644
--- a/core/app-mgr/app-manager/resource_reg.c
+++ b/core/app-mgr/app-manager/resource_reg.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 
diff --git a/core/app-mgr/app-manager/watchdog.c b/core/app-mgr/app-manager/watchdog.c
index c62f3d19..e2393945 100644
--- a/core/app-mgr/app-manager/watchdog.c
+++ b/core/app-mgr/app-manager/watchdog.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "watchdog.h"
diff --git a/core/app-mgr/app-manager/watchdog.h b/core/app-mgr/app-manager/watchdog.h
index 3c957551..a7a508bd 100644
--- a/core/app-mgr/app-manager/watchdog.h
+++ b/core/app-mgr/app-manager/watchdog.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 
diff --git a/core/app-mgr/app-mgr-shared/app_manager_export.h b/core/app-mgr/app-mgr-shared/app_manager_export.h
index 2a7ea21d..91ea96ab 100644
--- a/core/app-mgr/app-mgr-shared/app_manager_export.h
+++ b/core/app-mgr/app-mgr-shared/app_manager_export.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _APP_MANAGER_EXPORT_H_
diff --git a/core/app-mgr/app-mgr-shared/app_mgr_shared.cmake b/core/app-mgr/app-mgr-shared/app_mgr_shared.cmake
index 16df591d..590e3f5a 100644
--- a/core/app-mgr/app-mgr-shared/app_mgr_shared.cmake
+++ b/core/app-mgr/app-mgr-shared/app_mgr_shared.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (APP_MGR_SHARED_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/app-mgr/app-mgr-shared/host_link.h b/core/app-mgr/app-mgr-shared/host_link.h
index d6cf5976..6c455ece 100644
--- a/core/app-mgr/app-mgr-shared/host_link.h
+++ b/core/app-mgr/app-mgr-shared/host_link.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef DEPS_APP_MGR_APP_MGR_SHARED_HOST_LINK_H_
diff --git a/core/iwasm/app-samples/hello-world-cmake/CMakeLists.txt b/core/iwasm/app-samples/hello-world-cmake/CMakeLists.txt
index fd4b2cca..935846d6 100644
--- a/core/iwasm/app-samples/hello-world-cmake/CMakeLists.txt
+++ b/core/iwasm/app-samples/hello-world-cmake/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 cmake_minimum_required (VERSION 3.5)
 project(hello_world)
diff --git a/core/iwasm/app-samples/hello-world-cmake/build.sh b/core/iwasm/app-samples/hello-world-cmake/build.sh
index 56077177..c00eb8a5 100755
--- a/core/iwasm/app-samples/hello-world-cmake/build.sh
+++ b/core/iwasm/app-samples/hello-world-cmake/build.sh
@@ -1,18 +1,7 @@
 #!/bin/bash
 
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 mkdir build
 cd build
diff --git a/core/iwasm/app-samples/hello-world-cmake/main.c b/core/iwasm/app-samples/hello-world-cmake/main.c
index ced44196..1c356c47 100644
--- a/core/iwasm/app-samples/hello-world-cmake/main.c
+++ b/core/iwasm/app-samples/hello-world-cmake/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "stdio.h"
diff --git a/core/iwasm/app-samples/hello-world-cmake/print.c b/core/iwasm/app-samples/hello-world-cmake/print.c
index 62378b83..8eee6b6b 100644
--- a/core/iwasm/app-samples/hello-world-cmake/print.c
+++ b/core/iwasm/app-samples/hello-world-cmake/print.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "stdio.h"
diff --git a/core/iwasm/app-samples/hello-world/build.sh b/core/iwasm/app-samples/hello-world/build.sh
index c856b5d9..1509e815 100755
--- a/core/iwasm/app-samples/hello-world/build.sh
+++ b/core/iwasm/app-samples/hello-world/build.sh
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 emcc -g -O3 *.c -s WASM=1 -s SIDE_MODULE=1 -s ASSERTIONS=1 -s STACK_OVERFLOW_CHECK=2 \
                 -s TOTAL_MEMORY=65536 -s TOTAL_STACK=4096 -o test.wasm
diff --git a/core/iwasm/app-samples/hello-world/main.c b/core/iwasm/app-samples/hello-world/main.c
index 0db9659b..791e1d02 100644
--- a/core/iwasm/app-samples/hello-world/main.c
+++ b/core/iwasm/app-samples/hello-world/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdio.h>
diff --git a/core/iwasm/app-samples/smart-light/build.sh b/core/iwasm/app-samples/smart-light/build.sh
index f1b43c8f..e6dab5fc 100755
--- a/core/iwasm/app-samples/smart-light/build.sh
+++ b/core/iwasm/app-samples/smart-light/build.sh
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 emcc -g -O3 *.c -s WASM=1 -s SIDE_MODULE=1 -s ASSERTIONS=1 -s STACK_OVERFLOW_CHECK=2 \
      -s TOTAL_MEMORY=65536 -s TOTAL_STACK=4096 -o test.wasm
diff --git a/core/iwasm/app-samples/smart-light/main.c b/core/iwasm/app-samples/smart-light/main.c
index 62ae5ac1..2355b312 100644
--- a/core/iwasm/app-samples/smart-light/main.c
+++ b/core/iwasm/app-samples/smart-light/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdio.h>
diff --git a/core/iwasm/lib/app-libs/base/bh_platform.c b/core/iwasm/lib/app-libs/base/bh_platform.c
index a712336f..37b828e0 100644
--- a/core/iwasm/lib/app-libs/base/bh_platform.c
+++ b/core/iwasm/lib/app-libs/base/bh_platform.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/iwasm/lib/app-libs/base/bh_platform.h b/core/iwasm/lib/app-libs/base/bh_platform.h
index 7d12983b..d44522c0 100755
--- a/core/iwasm/lib/app-libs/base/bh_platform.h
+++ b/core/iwasm/lib/app-libs/base/bh_platform.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef DEPS_IWASM_APP_LIBS_BASE_BH_PLATFORM_H_
diff --git a/core/iwasm/lib/app-libs/base/request.c b/core/iwasm/lib/app-libs/base/request.c
index ade6ce4e..5dd415dc 100644
--- a/core/iwasm/lib/app-libs/base/request.c
+++ b/core/iwasm/lib/app-libs/base/request.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "attr_container.h"
diff --git a/core/iwasm/lib/app-libs/base/request.h b/core/iwasm/lib/app-libs/base/request.h
index f60b9f69..571bda72 100644
--- a/core/iwasm/lib/app-libs/base/request.h
+++ b/core/iwasm/lib/app-libs/base/request.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _AEE_REQUEST_H_
diff --git a/core/iwasm/lib/app-libs/base/timer.c b/core/iwasm/lib/app-libs/base/timer.c
index 0b3cd9f0..0a2c055d 100644
--- a/core/iwasm/lib/app-libs/base/timer.c
+++ b/core/iwasm/lib/app-libs/base/timer.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdlib.h>
diff --git a/core/iwasm/lib/app-libs/base/timer_wasm_app.h b/core/iwasm/lib/app-libs/base/timer_wasm_app.h
index 045a3f43..17e59bc0 100644
--- a/core/iwasm/lib/app-libs/base/timer_wasm_app.h
+++ b/core/iwasm/lib/app-libs/base/timer_wasm_app.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _AEE_TIMER_H_
diff --git a/core/iwasm/lib/app-libs/extension/connection/connection.c b/core/iwasm/lib/app-libs/extension/connection/connection.c
index e60504c2..75ad0b0e 100644
--- a/core/iwasm/lib/app-libs/extension/connection/connection.c
+++ b/core/iwasm/lib/app-libs/extension/connection/connection.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "connection.h"
diff --git a/core/iwasm/lib/app-libs/extension/connection/connection.h b/core/iwasm/lib/app-libs/extension/connection/connection.h
index d87352a2..6de04e10 100644
--- a/core/iwasm/lib/app-libs/extension/connection/connection.h
+++ b/core/iwasm/lib/app-libs/extension/connection/connection.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _CONNECTION_H_
diff --git a/core/iwasm/lib/app-libs/extension/gui/inc/wgl_btn.h b/core/iwasm/lib/app-libs/extension/gui/inc/wgl_btn.h
index 7cf8e9d6..bbf36441 100644
--- a/core/iwasm/lib/app-libs/extension/gui/inc/wgl_btn.h
+++ b/core/iwasm/lib/app-libs/extension/gui/inc/wgl_btn.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_BTN_H
diff --git a/core/iwasm/lib/app-libs/extension/gui/inc/wgl_cb.h b/core/iwasm/lib/app-libs/extension/gui/inc/wgl_cb.h
index 40604f46..5ff271ee 100644
--- a/core/iwasm/lib/app-libs/extension/gui/inc/wgl_cb.h
+++ b/core/iwasm/lib/app-libs/extension/gui/inc/wgl_cb.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_CB_H
diff --git a/core/iwasm/lib/app-libs/extension/gui/inc/wgl_label.h b/core/iwasm/lib/app-libs/extension/gui/inc/wgl_label.h
index 7cb06550..3c7f07a3 100644
--- a/core/iwasm/lib/app-libs/extension/gui/inc/wgl_label.h
+++ b/core/iwasm/lib/app-libs/extension/gui/inc/wgl_label.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_LABEL_H
diff --git a/core/iwasm/lib/app-libs/extension/gui/inc/wgl_list.h b/core/iwasm/lib/app-libs/extension/gui/inc/wgl_list.h
index c2c454b2..fd83276a 100644
--- a/core/iwasm/lib/app-libs/extension/gui/inc/wgl_list.h
+++ b/core/iwasm/lib/app-libs/extension/gui/inc/wgl_list.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_LIST_H
diff --git a/core/iwasm/lib/app-libs/extension/gui/inc/wgl_obj.h b/core/iwasm/lib/app-libs/extension/gui/inc/wgl_obj.h
index 7bd8775f..80d2cb09 100644
--- a/core/iwasm/lib/app-libs/extension/gui/inc/wgl_obj.h
+++ b/core/iwasm/lib/app-libs/extension/gui/inc/wgl_obj.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_OBJ_H
diff --git a/core/iwasm/lib/app-libs/extension/gui/inc/wgl_types.h b/core/iwasm/lib/app-libs/extension/gui/inc/wgl_types.h
index 30b115fa..8f695652 100644
--- a/core/iwasm/lib/app-libs/extension/gui/inc/wgl_types.h
+++ b/core/iwasm/lib/app-libs/extension/gui/inc/wgl_types.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_TYPES_H
diff --git a/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_btn.h b/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_btn.h
index 7aa2391f..75337a4e 100644
--- a/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_btn.h
+++ b/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_btn.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_BTN_LVGL_COMPATIBLE_H
diff --git a/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_cb.h b/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_cb.h
index 04e5d85e..edaa109b 100644
--- a/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_cb.h
+++ b/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_cb.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_CB_LVGL_COMPATIBLE_H
diff --git a/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_label.h b/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_label.h
index 060e115f..264ae295 100644
--- a/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_label.h
+++ b/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_label.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_LABEL_LVGL_COMPATIBLE_H
diff --git a/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_list.h b/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_list.h
index 5f3c4b61..cc9a35a8 100644
--- a/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_list.h
+++ b/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_list.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_LIST_LVGL_COMPATIBLE_H
diff --git a/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_obj.h b/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_obj.h
index 1ea3ab85..b79ffb73 100644
--- a/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_obj.h
+++ b/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_obj.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_OBJ_LVGL_COMPATIBLE_H
diff --git a/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_types.h b/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_types.h
index 36157d14..c8954b72 100644
--- a/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_types.h
+++ b/core/iwasm/lib/app-libs/extension/gui/lvgl-compatible/lv_types.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_TYPES_LVGL_COMPATIBLE_H
diff --git a/core/iwasm/lib/app-libs/extension/gui/lvgl.h b/core/iwasm/lib/app-libs/extension/gui/lvgl.h
index b8eb99ce..8a8a3b7e 100644
--- a/core/iwasm/lib/app-libs/extension/gui/lvgl.h
+++ b/core/iwasm/lib/app-libs/extension/gui/lvgl.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_LVGL_COMPATIBLE_H
diff --git a/core/iwasm/lib/app-libs/extension/gui/src/wgl_btn.c b/core/iwasm/lib/app-libs/extension/gui/src/wgl_btn.c
index 2124892e..bca1e4c0 100644
--- a/core/iwasm/lib/app-libs/extension/gui/src/wgl_btn.c
+++ b/core/iwasm/lib/app-libs/extension/gui/src/wgl_btn.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wgl.h"
diff --git a/core/iwasm/lib/app-libs/extension/gui/src/wgl_cb.c b/core/iwasm/lib/app-libs/extension/gui/src/wgl_cb.c
index d089b58a..ef60c2f9 100644
--- a/core/iwasm/lib/app-libs/extension/gui/src/wgl_cb.c
+++ b/core/iwasm/lib/app-libs/extension/gui/src/wgl_cb.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wgl.h"
diff --git a/core/iwasm/lib/app-libs/extension/gui/src/wgl_label.c b/core/iwasm/lib/app-libs/extension/gui/src/wgl_label.c
index cb45154e..49019b13 100644
--- a/core/iwasm/lib/app-libs/extension/gui/src/wgl_label.c
+++ b/core/iwasm/lib/app-libs/extension/gui/src/wgl_label.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 
diff --git a/core/iwasm/lib/app-libs/extension/gui/src/wgl_list.c b/core/iwasm/lib/app-libs/extension/gui/src/wgl_list.c
index 4be3fe6f..139a28a0 100644
--- a/core/iwasm/lib/app-libs/extension/gui/src/wgl_list.c
+++ b/core/iwasm/lib/app-libs/extension/gui/src/wgl_list.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wgl.h"
diff --git a/core/iwasm/lib/app-libs/extension/gui/src/wgl_obj.c b/core/iwasm/lib/app-libs/extension/gui/src/wgl_obj.c
index 5798ca3d..e7741edc 100644
--- a/core/iwasm/lib/app-libs/extension/gui/src/wgl_obj.c
+++ b/core/iwasm/lib/app-libs/extension/gui/src/wgl_obj.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wgl.h"
diff --git a/core/iwasm/lib/app-libs/extension/gui/wgl.h b/core/iwasm/lib/app-libs/extension/gui/wgl.h
index 2f1e7946..4a9266bf 100644
--- a/core/iwasm/lib/app-libs/extension/gui/wgl.h
+++ b/core/iwasm/lib/app-libs/extension/gui/wgl.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_H
diff --git a/core/iwasm/lib/app-libs/extension/sensor/sensor.c b/core/iwasm/lib/app-libs/extension/sensor/sensor.c
index 212b2e16..01247979 100644
--- a/core/iwasm/lib/app-libs/extension/sensor/sensor.c
+++ b/core/iwasm/lib/app-libs/extension/sensor/sensor.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "sensor.h"
diff --git a/core/iwasm/lib/app-libs/extension/sensor/sensor.h b/core/iwasm/lib/app-libs/extension/sensor/sensor.h
index 7aa4cb62..469349e5 100644
--- a/core/iwasm/lib/app-libs/extension/sensor/sensor.h
+++ b/core/iwasm/lib/app-libs/extension/sensor/sensor.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _AEE_SENSOR_H_
diff --git a/core/iwasm/lib/app-libs/libc/lib_base.h b/core/iwasm/lib/app-libs/libc/lib_base.h
index 35e4a83d..4fbb0900 100644
--- a/core/iwasm/lib/app-libs/libc/lib_base.h
+++ b/core/iwasm/lib/app-libs/libc/lib_base.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _LIB_BASE_H_
diff --git a/core/iwasm/lib/native-interface/attr_container.c b/core/iwasm/lib/native-interface/attr_container.c
index 535beb63..00bcf23a 100644
--- a/core/iwasm/lib/native-interface/attr_container.c
+++ b/core/iwasm/lib/native-interface/attr_container.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "attr_container.h"
diff --git a/core/iwasm/lib/native-interface/attr_container.h b/core/iwasm/lib/native-interface/attr_container.h
index 2b093bf0..52e0ebcc 100644
--- a/core/iwasm/lib/native-interface/attr_container.h
+++ b/core/iwasm/lib/native-interface/attr_container.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _ATTR_CONTAINER_H_
diff --git a/core/iwasm/lib/native-interface/connection_api.h b/core/iwasm/lib/native-interface/connection_api.h
index 21142b70..5697c836 100644
--- a/core/iwasm/lib/native-interface/connection_api.h
+++ b/core/iwasm/lib/native-interface/connection_api.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef CONNECTION_API_H_
diff --git a/core/iwasm/lib/native-interface/gui_api.h b/core/iwasm/lib/native-interface/gui_api.h
index 04031c1f..991b079e 100644
--- a/core/iwasm/lib/native-interface/gui_api.h
+++ b/core/iwasm/lib/native-interface/gui_api.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _GUI_API_H_
diff --git a/core/iwasm/lib/native-interface/native_interface.cmake b/core/iwasm/lib/native-interface/native_interface.cmake
index b7d44296..e4c89ac6 100644
--- a/core/iwasm/lib/native-interface/native_interface.cmake
+++ b/core/iwasm/lib/native-interface/native_interface.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (NATIVE_INTERFACE_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/iwasm/lib/native-interface/native_interface.h b/core/iwasm/lib/native-interface/native_interface.h
index 74422616..2fb8e35c 100644
--- a/core/iwasm/lib/native-interface/native_interface.h
+++ b/core/iwasm/lib/native-interface/native_interface.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _NATIVE_INTERFACE_H_
diff --git a/core/iwasm/lib/native-interface/req_resp_api.h b/core/iwasm/lib/native-interface/req_resp_api.h
index 8b223571..cbddab5f 100644
--- a/core/iwasm/lib/native-interface/req_resp_api.h
+++ b/core/iwasm/lib/native-interface/req_resp_api.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _REQ_RESP_API_H_
diff --git a/core/iwasm/lib/native-interface/restful_utils.c b/core/iwasm/lib/native-interface/restful_utils.c
index e7afad46..d0ae1b3c 100644
--- a/core/iwasm/lib/native-interface/restful_utils.c
+++ b/core/iwasm/lib/native-interface/restful_utils.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdlib.h>
diff --git a/core/iwasm/lib/native-interface/sensor_api.h b/core/iwasm/lib/native-interface/sensor_api.h
index 1adf93b1..9f676770 100644
--- a/core/iwasm/lib/native-interface/sensor_api.h
+++ b/core/iwasm/lib/native-interface/sensor_api.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _SENSOR_API_H_
diff --git a/core/iwasm/lib/native-interface/shared_utils.h b/core/iwasm/lib/native-interface/shared_utils.h
index d0727164..bc49758f 100644
--- a/core/iwasm/lib/native-interface/shared_utils.h
+++ b/core/iwasm/lib/native-interface/shared_utils.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _SHARED_UTILS_H_
diff --git a/core/iwasm/lib/native-interface/timer_api.h b/core/iwasm/lib/native-interface/timer_api.h
index 1beabf8e..0881bab9 100644
--- a/core/iwasm/lib/native-interface/timer_api.h
+++ b/core/iwasm/lib/native-interface/timer_api.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _TIMER_API_H_
diff --git a/core/iwasm/lib/native-interface/wgl_shared_utils.h b/core/iwasm/lib/native-interface/wgl_shared_utils.h
index 0d64b436..1163d1b9 100644
--- a/core/iwasm/lib/native-interface/wgl_shared_utils.h
+++ b/core/iwasm/lib/native-interface/wgl_shared_utils.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WAMR_GRAPHIC_LIBRARY_SHARED_UTILS_H
diff --git a/core/iwasm/lib/native/base/base_lib_export.c b/core/iwasm/lib/native/base/base_lib_export.c
index fb62e7be..e22f4635 100644
--- a/core/iwasm/lib/native/base/base_lib_export.c
+++ b/core/iwasm/lib/native/base/base_lib_export.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdio.h>
diff --git a/core/iwasm/lib/native/base/base_lib_export.h b/core/iwasm/lib/native/base/base_lib_export.h
index c3456b18..db9922ec 100644
--- a/core/iwasm/lib/native/base/base_lib_export.h
+++ b/core/iwasm/lib/native/base/base_lib_export.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BASE_LIB_EXPORT_H_
diff --git a/core/iwasm/lib/native/base/request_response.c b/core/iwasm/lib/native/base/request_response.c
index 7efccb90..97491e50 100644
--- a/core/iwasm/lib/native/base/request_response.c
+++ b/core/iwasm/lib/native/base/request_response.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "app_manager_export.h"
diff --git a/core/iwasm/lib/native/base/runtime_lib.h b/core/iwasm/lib/native/base/runtime_lib.h
index 972d9df8..ef5aa3af 100644
--- a/core/iwasm/lib/native/base/runtime_lib.h
+++ b/core/iwasm/lib/native/base/runtime_lib.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef LIB_BASE_RUNTIME_LIB_H_
diff --git a/core/iwasm/lib/native/base/timer_wrapper.c b/core/iwasm/lib/native/base/timer_wrapper.c
index 7c7e1e05..ce9bacd9 100644
--- a/core/iwasm/lib/native/base/timer_wrapper.c
+++ b/core/iwasm/lib/native/base/timer_wrapper.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "runtime_timer.h"
diff --git a/core/iwasm/lib/native/base/wasm_lib_base.cmake b/core/iwasm/lib/native/base/wasm_lib_base.cmake
index de80a578..e7976d0e 100644
--- a/core/iwasm/lib/native/base/wasm_lib_base.cmake
+++ b/core/iwasm/lib/native/base/wasm_lib_base.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (WASM_LIB_BASE_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/iwasm/lib/native/extension/connection/connection.inl b/core/iwasm/lib/native/extension/connection/connection.inl
index e7366509..fdab6774 100644
--- a/core/iwasm/lib/native/extension/connection/connection.inl
+++ b/core/iwasm/lib/native/extension/connection/connection.inl
@@ -1,17 +1,6 @@
 /*
 * Copyright (C) 2019 Intel Corporation.  All rights reserved.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */
 
 EXPORT_WASM_API(wasm_open_connection),
diff --git a/core/iwasm/lib/native/extension/connection/connection_lib.h b/core/iwasm/lib/native/extension/connection/connection_lib.h
index 15b6d035..9a09a10b 100644
--- a/core/iwasm/lib/native/extension/connection/connection_lib.h
+++ b/core/iwasm/lib/native/extension/connection/connection_lib.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef CONNECTION_LIB_H_
diff --git a/core/iwasm/lib/native/extension/connection/connection_wrapper.c b/core/iwasm/lib/native/extension/connection/connection_wrapper.c
index d74d37ce..1d408d57 100644
--- a/core/iwasm/lib/native/extension/connection/connection_wrapper.c
+++ b/core/iwasm/lib/native/extension/connection/connection_wrapper.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "connection_lib.h"
diff --git a/core/iwasm/lib/native/extension/connection/linux/conn_tcp.c b/core/iwasm/lib/native/extension/connection/linux/conn_tcp.c
index 3a6bded2..e676e53a 100644
--- a/core/iwasm/lib/native/extension/connection/linux/conn_tcp.c
+++ b/core/iwasm/lib/native/extension/connection/linux/conn_tcp.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "conn_tcp.h"
diff --git a/core/iwasm/lib/native/extension/connection/linux/conn_tcp.h b/core/iwasm/lib/native/extension/connection/linux/conn_tcp.h
index 84caf2a1..c1b560e3 100644
--- a/core/iwasm/lib/native/extension/connection/linux/conn_tcp.h
+++ b/core/iwasm/lib/native/extension/connection/linux/conn_tcp.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef CONN_LINUX_TCP_H_
diff --git a/core/iwasm/lib/native/extension/connection/linux/conn_uart.c b/core/iwasm/lib/native/extension/connection/linux/conn_uart.c
index 6ca848b6..06318c2c 100644
--- a/core/iwasm/lib/native/extension/connection/linux/conn_uart.c
+++ b/core/iwasm/lib/native/extension/connection/linux/conn_uart.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "conn_uart.h"
diff --git a/core/iwasm/lib/native/extension/connection/linux/conn_uart.h b/core/iwasm/lib/native/extension/connection/linux/conn_uart.h
index 1e67811d..9d40fb00 100644
--- a/core/iwasm/lib/native/extension/connection/linux/conn_uart.h
+++ b/core/iwasm/lib/native/extension/connection/linux/conn_uart.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef CONN_LINUX_UART_H_
diff --git a/core/iwasm/lib/native/extension/connection/linux/conn_udp.c b/core/iwasm/lib/native/extension/connection/linux/conn_udp.c
index d93c23f8..e7093a71 100644
--- a/core/iwasm/lib/native/extension/connection/linux/conn_udp.c
+++ b/core/iwasm/lib/native/extension/connection/linux/conn_udp.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "conn_udp.h"
diff --git a/core/iwasm/lib/native/extension/connection/linux/conn_udp.h b/core/iwasm/lib/native/extension/connection/linux/conn_udp.h
index f3cbf4b1..37b9db79 100644
--- a/core/iwasm/lib/native/extension/connection/linux/conn_udp.h
+++ b/core/iwasm/lib/native/extension/connection/linux/conn_udp.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef CONN_LINUX_UDP_H_
diff --git a/core/iwasm/lib/native/extension/connection/linux/connection_mgr.c b/core/iwasm/lib/native/extension/connection/linux/connection_mgr.c
index f6b87165..78690666 100644
--- a/core/iwasm/lib/native/extension/connection/linux/connection_mgr.c
+++ b/core/iwasm/lib/native/extension/connection/linux/connection_mgr.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 /*
diff --git a/core/iwasm/lib/native/extension/connection/linux/connection_mgr.cmake b/core/iwasm/lib/native/extension/connection/linux/connection_mgr.cmake
index 72ab4554..c8f2b487 100644
--- a/core/iwasm/lib/native/extension/connection/linux/connection_mgr.cmake
+++ b/core/iwasm/lib/native/extension/connection/linux/connection_mgr.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (WASM_LIB_CONN_MGR_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/iwasm/lib/native/extension/connection/wasm_lib_conn.cmake b/core/iwasm/lib/native/extension/connection/wasm_lib_conn.cmake
index 2018706e..66582c92 100644
--- a/core/iwasm/lib/native/extension/connection/wasm_lib_conn.cmake
+++ b/core/iwasm/lib/native/extension/connection/wasm_lib_conn.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (WASM_LIB_CONN_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/iwasm/lib/native/extension/connection/zephyr/connection_lib_impl.c b/core/iwasm/lib/native/extension/connection/zephyr/connection_lib_impl.c
index 37943707..9c30edca 100644
--- a/core/iwasm/lib/native/extension/connection/zephyr/connection_lib_impl.c
+++ b/core/iwasm/lib/native/extension/connection/zephyr/connection_lib_impl.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 /*
diff --git a/core/iwasm/lib/native/extension/gui/wamr_gui.inl b/core/iwasm/lib/native/extension/gui/wamr_gui.inl
index 49ce5bff..1b892cc8 100644
--- a/core/iwasm/lib/native/extension/gui/wamr_gui.inl
+++ b/core/iwasm/lib/native/extension/gui/wamr_gui.inl
@@ -1,17 +1,6 @@
 /*
 * Copyright (C) 2019 Intel Corporation.  All rights reserved.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */
 
 /* button */
diff --git a/core/iwasm/lib/native/extension/gui/wasm_lib_gui.cmake b/core/iwasm/lib/native/extension/gui/wasm_lib_gui.cmake
index d8af8c9e..3658cd44 100644
--- a/core/iwasm/lib/native/extension/gui/wasm_lib_gui.cmake
+++ b/core/iwasm/lib/native/extension/gui/wasm_lib_gui.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (WASM_LIB_GUI_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/iwasm/lib/native/extension/gui/wgl_btn_wrapper.c b/core/iwasm/lib/native/extension/gui/wgl_btn_wrapper.c
index 9b5c85a9..5abd7578 100644
--- a/core/iwasm/lib/native/extension/gui/wgl_btn_wrapper.c
+++ b/core/iwasm/lib/native/extension/gui/wgl_btn_wrapper.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "native_interface.h"
diff --git a/core/iwasm/lib/native/extension/gui/wgl_cb_wrapper.c b/core/iwasm/lib/native/extension/gui/wgl_cb_wrapper.c
index 90abbc40..4f238afd 100644
--- a/core/iwasm/lib/native/extension/gui/wgl_cb_wrapper.c
+++ b/core/iwasm/lib/native/extension/gui/wgl_cb_wrapper.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "lvgl.h"
diff --git a/core/iwasm/lib/native/extension/gui/wgl_cont_wrapper.c b/core/iwasm/lib/native/extension/gui/wgl_cont_wrapper.c
index 709ed753..70eeb0f4 100644
--- a/core/iwasm/lib/native/extension/gui/wgl_cont_wrapper.c
+++ b/core/iwasm/lib/native/extension/gui/wgl_cont_wrapper.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "lvgl.h"
diff --git a/core/iwasm/lib/native/extension/gui/wgl_label_wrapper.c b/core/iwasm/lib/native/extension/gui/wgl_label_wrapper.c
index 0a7062de..a844b724 100644
--- a/core/iwasm/lib/native/extension/gui/wgl_label_wrapper.c
+++ b/core/iwasm/lib/native/extension/gui/wgl_label_wrapper.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "lvgl.h"
diff --git a/core/iwasm/lib/native/extension/gui/wgl_list_wrapper.c b/core/iwasm/lib/native/extension/gui/wgl_list_wrapper.c
index df9ba3d3..8e6c601d 100644
--- a/core/iwasm/lib/native/extension/gui/wgl_list_wrapper.c
+++ b/core/iwasm/lib/native/extension/gui/wgl_list_wrapper.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "native_interface.h"
diff --git a/core/iwasm/lib/native/extension/gui/wgl_obj_wrapper.c b/core/iwasm/lib/native/extension/gui/wgl_obj_wrapper.c
index cd15dab2..14bad3a2 100644
--- a/core/iwasm/lib/native/extension/gui/wgl_obj_wrapper.c
+++ b/core/iwasm/lib/native/extension/gui/wgl_obj_wrapper.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "lvgl.h"
diff --git a/core/iwasm/lib/native/extension/sensor/runtime_sensor.c b/core/iwasm/lib/native/extension/sensor/runtime_sensor.c
index 3dd0cf62..1a01993c 100644
--- a/core/iwasm/lib/native/extension/sensor/runtime_sensor.c
+++ b/core/iwasm/lib/native/extension/sensor/runtime_sensor.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "runtime_sensor.h"
diff --git a/core/iwasm/lib/native/extension/sensor/runtime_sensor.h b/core/iwasm/lib/native/extension/sensor/runtime_sensor.h
index f19b4f09..2ba4859e 100644
--- a/core/iwasm/lib/native/extension/sensor/runtime_sensor.h
+++ b/core/iwasm/lib/native/extension/sensor/runtime_sensor.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef LIB_EXTENSION_RUNTIME_SENSOR_H_
diff --git a/core/iwasm/lib/native/extension/sensor/runtime_sensor.inl b/core/iwasm/lib/native/extension/sensor/runtime_sensor.inl
index ea8a6d3a..e1884341 100644
--- a/core/iwasm/lib/native/extension/sensor/runtime_sensor.inl
+++ b/core/iwasm/lib/native/extension/sensor/runtime_sensor.inl
@@ -1,17 +1,6 @@
 /*
 * Copyright (C) 2019 Intel Corporation.  All rights reserved.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */
 
 EXPORT_WASM_API(wasm_sensor_open),
diff --git a/core/iwasm/lib/native/extension/sensor/sensor_mgr_ref.c b/core/iwasm/lib/native/extension/sensor/sensor_mgr_ref.c
index a5093135..adac713d 100644
--- a/core/iwasm/lib/native/extension/sensor/sensor_mgr_ref.c
+++ b/core/iwasm/lib/native/extension/sensor/sensor_mgr_ref.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_common.h"
diff --git a/core/iwasm/lib/native/extension/sensor/wasm_lib_sensor.cmake b/core/iwasm/lib/native/extension/sensor/wasm_lib_sensor.cmake
index 9461f841..49ce5564 100644
--- a/core/iwasm/lib/native/extension/sensor/wasm_lib_sensor.cmake
+++ b/core/iwasm/lib/native/extension/sensor/wasm_lib_sensor.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (WASM_LIB_SENSOR_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/iwasm/lib/native/extension/template/lib_export_template.c b/core/iwasm/lib/native/extension/template/lib_export_template.c
index 6becf41c..35159728 100644
--- a/core/iwasm/lib/native/extension/template/lib_export_template.c
+++ b/core/iwasm/lib/native/extension/template/lib_export_template.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdio.h>
diff --git a/core/iwasm/lib/native/libc/libc_wrapper.c b/core/iwasm/lib/native/libc/libc_wrapper.c
index 4127f4f4..22f848f7 100644
--- a/core/iwasm/lib/native/libc/libc_wrapper.c
+++ b/core/iwasm/lib/native/libc/libc_wrapper.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_native.h"
diff --git a/core/iwasm/lib/native/libc/wasm_libc.cmake b/core/iwasm/lib/native/libc/wasm_libc.cmake
index 52e55123..f84c3ac6 100644
--- a/core/iwasm/lib/native/libc/wasm_libc.cmake
+++ b/core/iwasm/lib/native/libc/wasm_libc.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (WASM_LIBC_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/iwasm/products/alios-things/iwasm.mk b/core/iwasm/products/alios-things/iwasm.mk
index 803578c1..29773812 100644
--- a/core/iwasm/products/alios-things/iwasm.mk
+++ b/core/iwasm/products/alios-things/iwasm.mk
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 NAME := iwasm
 IWASM_ROOT := iwasm
diff --git a/core/iwasm/products/alios-things/src/ext_lib_export.c b/core/iwasm/products/alios-things/src/ext_lib_export.c
index 8d78f3ae..8813f0db 100644
--- a/core/iwasm/products/alios-things/src/ext_lib_export.c
+++ b/core/iwasm/products/alios-things/src/ext_lib_export.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "lib_export.h"
diff --git a/core/iwasm/products/alios-things/src/main.c b/core/iwasm/products/alios-things/src/main.c
index 33624785..e4f42f1c 100644
--- a/core/iwasm/products/alios-things/src/main.c
+++ b/core/iwasm/products/alios-things/src/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdlib.h>
diff --git a/core/iwasm/products/alios-things/src/test_wasm.h b/core/iwasm/products/alios-things/src/test_wasm.h
index aa9572b0..a2f12706 100644
--- a/core/iwasm/products/alios-things/src/test_wasm.h
+++ b/core/iwasm/products/alios-things/src/test_wasm.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 unsigned char wasm_test_file[] = { 0x00, 0x61, 0x73, 0x6D, 0x01, 0x00, 0x00,
diff --git a/core/iwasm/products/darwin/CMakeLists.txt b/core/iwasm/products/darwin/CMakeLists.txt
index e327f3ca..868ba37a 100644
--- a/core/iwasm/products/darwin/CMakeLists.txt
+++ b/core/iwasm/products/darwin/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 cmake_minimum_required (VERSION 2.8)
 
diff --git a/core/iwasm/products/darwin/ext_lib_export.c b/core/iwasm/products/darwin/ext_lib_export.c
index 8d78f3ae..8813f0db 100644
--- a/core/iwasm/products/darwin/ext_lib_export.c
+++ b/core/iwasm/products/darwin/ext_lib_export.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "lib_export.h"
diff --git a/core/iwasm/products/darwin/main.c b/core/iwasm/products/darwin/main.c
index 65f464c0..f6b04c0e 100644
--- a/core/iwasm/products/darwin/main.c
+++ b/core/iwasm/products/darwin/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _GNU_SOURCE
diff --git a/core/iwasm/products/linux-sgx/CMakeLists.txt b/core/iwasm/products/linux-sgx/CMakeLists.txt
index 9f9f980e..698abfac 100644
--- a/core/iwasm/products/linux-sgx/CMakeLists.txt
+++ b/core/iwasm/products/linux-sgx/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 cmake_minimum_required (VERSION 2.8)
 
diff --git a/core/iwasm/products/linux-sgx/ext_lib_export.c b/core/iwasm/products/linux-sgx/ext_lib_export.c
index 8d78f3ae..8813f0db 100644
--- a/core/iwasm/products/linux-sgx/ext_lib_export.c
+++ b/core/iwasm/products/linux-sgx/ext_lib_export.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "lib_export.h"
diff --git a/core/iwasm/products/linux/CMakeLists.txt b/core/iwasm/products/linux/CMakeLists.txt
index b21c4ad6..ab36f22e 100644
--- a/core/iwasm/products/linux/CMakeLists.txt
+++ b/core/iwasm/products/linux/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 cmake_minimum_required (VERSION 2.8)
 
diff --git a/core/iwasm/products/linux/ext_lib_export.c b/core/iwasm/products/linux/ext_lib_export.c
index 8d78f3ae..8813f0db 100644
--- a/core/iwasm/products/linux/ext_lib_export.c
+++ b/core/iwasm/products/linux/ext_lib_export.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "lib_export.h"
diff --git a/core/iwasm/products/linux/main.c b/core/iwasm/products/linux/main.c
index 86c6e5e7..481e8365 100644
--- a/core/iwasm/products/linux/main.c
+++ b/core/iwasm/products/linux/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _GNU_SOURCE
diff --git a/core/iwasm/products/vxworks/CMakeLists.txt b/core/iwasm/products/vxworks/CMakeLists.txt
index 53aa4278..20e2fcf1 100644
--- a/core/iwasm/products/vxworks/CMakeLists.txt
+++ b/core/iwasm/products/vxworks/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 cmake_minimum_required (VERSION 2.8)
 
diff --git a/core/iwasm/products/vxworks/ext_lib_export.c b/core/iwasm/products/vxworks/ext_lib_export.c
index 8d78f3ae..8813f0db 100644
--- a/core/iwasm/products/vxworks/ext_lib_export.c
+++ b/core/iwasm/products/vxworks/ext_lib_export.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "lib_export.h"
diff --git a/core/iwasm/products/vxworks/main.c b/core/iwasm/products/vxworks/main.c
index 22caee8a..df8513be 100644
--- a/core/iwasm/products/vxworks/main.c
+++ b/core/iwasm/products/vxworks/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _GNU_SOURCE
diff --git a/core/iwasm/products/zephyr/simple/CMakeLists.txt b/core/iwasm/products/zephyr/simple/CMakeLists.txt
index a62bebf6..1ba22bff 100644
--- a/core/iwasm/products/zephyr/simple/CMakeLists.txt
+++ b/core/iwasm/products/zephyr/simple/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 cmake_minimum_required(VERSION 3.8.2)
 
diff --git a/core/iwasm/products/zephyr/simple/src/ext_lib_export.c b/core/iwasm/products/zephyr/simple/src/ext_lib_export.c
index 8d78f3ae..8813f0db 100644
--- a/core/iwasm/products/zephyr/simple/src/ext_lib_export.c
+++ b/core/iwasm/products/zephyr/simple/src/ext_lib_export.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "lib_export.h"
diff --git a/core/iwasm/products/zephyr/simple/src/main.c b/core/iwasm/products/zephyr/simple/src/main.c
index da85a3bb..42e21d10 100644
--- a/core/iwasm/products/zephyr/simple/src/main.c
+++ b/core/iwasm/products/zephyr/simple/src/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdlib.h>
diff --git a/core/iwasm/products/zephyr/simple/src/test_wasm.h b/core/iwasm/products/zephyr/simple/src/test_wasm.h
index aa9572b0..a2f12706 100644
--- a/core/iwasm/products/zephyr/simple/src/test_wasm.h
+++ b/core/iwasm/products/zephyr/simple/src/test_wasm.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 unsigned char wasm_test_file[] = { 0x00, 0x61, 0x73, 0x6D, 0x01, 0x00, 0x00,
diff --git a/core/iwasm/runtime/include/bh_memory.h b/core/iwasm/runtime/include/bh_memory.h
index 352137a3..b2c091d2 100644
--- a/core/iwasm/runtime/include/bh_memory.h
+++ b/core/iwasm/runtime/include/bh_memory.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_MEMORY_H
diff --git a/core/iwasm/runtime/include/ext_lib_export.h b/core/iwasm/runtime/include/ext_lib_export.h
index a2f111fc..fbf8d17d 100644
--- a/core/iwasm/runtime/include/ext_lib_export.h
+++ b/core/iwasm/runtime/include/ext_lib_export.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _EXT_LIB_EXPORT_H_
diff --git a/core/iwasm/runtime/include/lib_export.h b/core/iwasm/runtime/include/lib_export.h
index e5eb6b7e..2d3de172 100644
--- a/core/iwasm/runtime/include/lib_export.h
+++ b/core/iwasm/runtime/include/lib_export.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _LIB_EXPORT_H_
diff --git a/core/iwasm/runtime/include/wasm_application.h b/core/iwasm/runtime/include/wasm_application.h
index 31813b2e..635ed26d 100644
--- a/core/iwasm/runtime/include/wasm_application.h
+++ b/core/iwasm/runtime/include/wasm_application.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Taobao (China) Inc.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_APPLICATION_H
diff --git a/core/iwasm/runtime/include/wasm_dlfcn.h b/core/iwasm/runtime/include/wasm_dlfcn.h
index ce45de2b..eeddef61 100644
--- a/core/iwasm/runtime/include/wasm_dlfcn.h
+++ b/core/iwasm/runtime/include/wasm_dlfcn.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_DLFCN_H
diff --git a/core/iwasm/runtime/include/wasm_export.h b/core/iwasm/runtime/include/wasm_export.h
index 2322cc57..98be2c91 100644
--- a/core/iwasm/runtime/include/wasm_export.h
+++ b/core/iwasm/runtime/include/wasm_export.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_EXPORT_H
diff --git a/core/iwasm/runtime/include/wasm_hashmap.h b/core/iwasm/runtime/include/wasm_hashmap.h
index f90c0cc1..93988810 100644
--- a/core/iwasm/runtime/include/wasm_hashmap.h
+++ b/core/iwasm/runtime/include/wasm_hashmap.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef WASM_HASHMAP_H
diff --git a/core/iwasm/runtime/include/wasm_log.h b/core/iwasm/runtime/include/wasm_log.h
index cba03b04..38243803 100644
--- a/core/iwasm/runtime/include/wasm_log.h
+++ b/core/iwasm/runtime/include/wasm_log.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 /**
diff --git a/core/iwasm/runtime/include/wasm_vector.h b/core/iwasm/runtime/include/wasm_vector.h
index e11832ed..a18588c4 100644
--- a/core/iwasm/runtime/include/wasm_vector.h
+++ b/core/iwasm/runtime/include/wasm_vector.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_VECTOR_H
diff --git a/core/iwasm/runtime/platform/alios/wasm_native.c b/core/iwasm/runtime/platform/alios/wasm_native.c
index 43276fe6..70f87d38 100644
--- a/core/iwasm/runtime/platform/alios/wasm_native.c
+++ b/core/iwasm/runtime/platform/alios/wasm_native.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_native.h"
diff --git a/core/iwasm/runtime/platform/darwin/platform.cmake b/core/iwasm/runtime/platform/darwin/platform.cmake
index ea7f7497..887a4fc5 100644
--- a/core/iwasm/runtime/platform/darwin/platform.cmake
+++ b/core/iwasm/runtime/platform/darwin/platform.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 add_definitions (-D__POSIX__ -D_XOPEN_SOURCE=600 -D_POSIX_C_SOURCE=200809L)
 
diff --git a/core/iwasm/runtime/platform/darwin/wasm_native.c b/core/iwasm/runtime/platform/darwin/wasm_native.c
index 8feb8412..fc3303ea 100644
--- a/core/iwasm/runtime/platform/darwin/wasm_native.c
+++ b/core/iwasm/runtime/platform/darwin/wasm_native.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_native.h"
diff --git a/core/iwasm/runtime/platform/include/wa_thread.h b/core/iwasm/runtime/platform/include/wa_thread.h
index 245dc5d6..2873bc82 100644
--- a/core/iwasm/runtime/platform/include/wa_thread.h
+++ b/core/iwasm/runtime/platform/include/wa_thread.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 /**
diff --git a/core/iwasm/runtime/platform/include/wasm_assert.h b/core/iwasm/runtime/platform/include/wasm_assert.h
index 687c8e59..f0f8b0dc 100644
--- a/core/iwasm/runtime/platform/include/wasm_assert.h
+++ b/core/iwasm/runtime/platform/include/wasm_assert.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_ASSERT_H
diff --git a/core/iwasm/runtime/platform/include/wasm_config.h b/core/iwasm/runtime/platform/include/wasm_config.h
index 06aa5e10..bb273257 100644
--- a/core/iwasm/runtime/platform/include/wasm_config.h
+++ b/core/iwasm/runtime/platform/include/wasm_config.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_CONFIG_H
diff --git a/core/iwasm/runtime/platform/include/wasm_memory.h b/core/iwasm/runtime/platform/include/wasm_memory.h
index 549ba476..b1f04a20 100644
--- a/core/iwasm/runtime/platform/include/wasm_memory.h
+++ b/core/iwasm/runtime/platform/include/wasm_memory.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_MEMORY_H
diff --git a/core/iwasm/runtime/platform/include/wasm_platform_log.h b/core/iwasm/runtime/platform/include/wasm_platform_log.h
index e74de3ff..48983840 100644
--- a/core/iwasm/runtime/platform/include/wasm_platform_log.h
+++ b/core/iwasm/runtime/platform/include/wasm_platform_log.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_PLATFORM_LOG
diff --git a/core/iwasm/runtime/platform/linux-sgx/platform.cmake b/core/iwasm/runtime/platform/linux-sgx/platform.cmake
index c01fd0e5..e687f830 100644
--- a/core/iwasm/runtime/platform/linux-sgx/platform.cmake
+++ b/core/iwasm/runtime/platform/linux-sgx/platform.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 add_definitions (-D__POSIX__ -D_XOPEN_SOURCE=600 -D_POSIX_C_SOURCE=199309L)
 
diff --git a/core/iwasm/runtime/platform/linux-sgx/wasm_native.c b/core/iwasm/runtime/platform/linux-sgx/wasm_native.c
index b8d64b08..40e70e15 100644
--- a/core/iwasm/runtime/platform/linux-sgx/wasm_native.c
+++ b/core/iwasm/runtime/platform/linux-sgx/wasm_native.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _GNU_SOURCE
diff --git a/core/iwasm/runtime/platform/linux/platform.cmake b/core/iwasm/runtime/platform/linux/platform.cmake
index c01fd0e5..e687f830 100644
--- a/core/iwasm/runtime/platform/linux/platform.cmake
+++ b/core/iwasm/runtime/platform/linux/platform.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 add_definitions (-D__POSIX__ -D_XOPEN_SOURCE=600 -D_POSIX_C_SOURCE=199309L)
 
diff --git a/core/iwasm/runtime/platform/linux/wasm_native.c b/core/iwasm/runtime/platform/linux/wasm_native.c
index 638f5734..22c68151 100644
--- a/core/iwasm/runtime/platform/linux/wasm_native.c
+++ b/core/iwasm/runtime/platform/linux/wasm_native.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _GNU_SOURCE
diff --git a/core/iwasm/runtime/platform/vxworks/platform.cmake b/core/iwasm/runtime/platform/vxworks/platform.cmake
index c01fd0e5..e687f830 100644
--- a/core/iwasm/runtime/platform/vxworks/platform.cmake
+++ b/core/iwasm/runtime/platform/vxworks/platform.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 add_definitions (-D__POSIX__ -D_XOPEN_SOURCE=600 -D_POSIX_C_SOURCE=199309L)
 
diff --git a/core/iwasm/runtime/platform/vxworks/wasm_native.c b/core/iwasm/runtime/platform/vxworks/wasm_native.c
index 43276fe6..70f87d38 100644
--- a/core/iwasm/runtime/platform/vxworks/wasm_native.c
+++ b/core/iwasm/runtime/platform/vxworks/wasm_native.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_native.h"
diff --git a/core/iwasm/runtime/platform/zephyr/wasm_native.c b/core/iwasm/runtime/platform/zephyr/wasm_native.c
index 43276fe6..70f87d38 100644
--- a/core/iwasm/runtime/platform/zephyr/wasm_native.c
+++ b/core/iwasm/runtime/platform/zephyr/wasm_native.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_native.h"
diff --git a/core/iwasm/runtime/utils/utils.cmake b/core/iwasm/runtime/utils/utils.cmake
index a636cb4c..cc39b97d 100644
--- a/core/iwasm/runtime/utils/utils.cmake
+++ b/core/iwasm/runtime/utils/utils.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (UTILS_LIB_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/iwasm/runtime/utils/wasm_dlfcn.c b/core/iwasm/runtime/utils/wasm_dlfcn.c
index 56439c71..d4d1dc40 100644
--- a/core/iwasm/runtime/utils/wasm_dlfcn.c
+++ b/core/iwasm/runtime/utils/wasm_dlfcn.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/iwasm/runtime/utils/wasm_hashmap.c b/core/iwasm/runtime/utils/wasm_hashmap.c
index f0a24a41..adaef5d8 100644
--- a/core/iwasm/runtime/utils/wasm_hashmap.c
+++ b/core/iwasm/runtime/utils/wasm_hashmap.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_hashmap.h"
diff --git a/core/iwasm/runtime/utils/wasm_log.c b/core/iwasm/runtime/utils/wasm_log.c
index 0bbb877b..e551c94b 100644
--- a/core/iwasm/runtime/utils/wasm_log.c
+++ b/core/iwasm/runtime/utils/wasm_log.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_log.h"
diff --git a/core/iwasm/runtime/utils/wasm_vector.c b/core/iwasm/runtime/utils/wasm_vector.c
index c3606da3..5e90a7a6 100644
--- a/core/iwasm/runtime/utils/wasm_vector.c
+++ b/core/iwasm/runtime/utils/wasm_vector.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_log.h"
diff --git a/core/iwasm/runtime/vmcore-wasm/invokeNative_arm.s b/core/iwasm/runtime/vmcore-wasm/invokeNative_arm.s
index 8d909144..3618c582 100644
--- a/core/iwasm/runtime/vmcore-wasm/invokeNative_arm.s
+++ b/core/iwasm/runtime/vmcore-wasm/invokeNative_arm.s
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
         .text
         .align  2
diff --git a/core/iwasm/runtime/vmcore-wasm/invokeNative_em64.s b/core/iwasm/runtime/vmcore-wasm/invokeNative_em64.s
index 34bc9c27..26a0a8b8 100644
--- a/core/iwasm/runtime/vmcore-wasm/invokeNative_em64.s
+++ b/core/iwasm/runtime/vmcore-wasm/invokeNative_em64.s
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
     .text
     .align 2
diff --git a/core/iwasm/runtime/vmcore-wasm/invokeNative_general.c b/core/iwasm/runtime/vmcore-wasm/invokeNative_general.c
index 09e1b622..dc2db2db 100644
--- a/core/iwasm/runtime/vmcore-wasm/invokeNative_general.c
+++ b/core/iwasm/runtime/vmcore-wasm/invokeNative_general.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_runtime.h"
diff --git a/core/iwasm/runtime/vmcore-wasm/invokeNative_ia32.s b/core/iwasm/runtime/vmcore-wasm/invokeNative_ia32.s
index 6fb66b60..8a121609 100644
--- a/core/iwasm/runtime/vmcore-wasm/invokeNative_ia32.s
+++ b/core/iwasm/runtime/vmcore-wasm/invokeNative_ia32.s
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
     .text
diff --git a/core/iwasm/runtime/vmcore-wasm/invokeNative_mips.s b/core/iwasm/runtime/vmcore-wasm/invokeNative_mips.s
index 78a212b2..645f4f2e 100644
--- a/core/iwasm/runtime/vmcore-wasm/invokeNative_mips.s
+++ b/core/iwasm/runtime/vmcore-wasm/invokeNative_mips.s
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
     .text
diff --git a/core/iwasm/runtime/vmcore-wasm/vmcore.cmake b/core/iwasm/runtime/vmcore-wasm/vmcore.cmake
index ff69c003..00cd35df 100644
--- a/core/iwasm/runtime/vmcore-wasm/vmcore.cmake
+++ b/core/iwasm/runtime/vmcore-wasm/vmcore.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (VMCORE_LIB_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/iwasm/runtime/vmcore-wasm/wasm.h b/core/iwasm/runtime/vmcore-wasm/wasm.h
index 06b655e2..f9077103 100644
--- a/core/iwasm/runtime/vmcore-wasm/wasm.h
+++ b/core/iwasm/runtime/vmcore-wasm/wasm.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_H_
diff --git a/core/iwasm/runtime/vmcore-wasm/wasm_application.c b/core/iwasm/runtime/vmcore-wasm/wasm_application.c
index d3aef0c6..8fcabde7 100644
--- a/core/iwasm/runtime/vmcore-wasm/wasm_application.c
+++ b/core/iwasm/runtime/vmcore-wasm/wasm_application.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <errno.h>
diff --git a/core/iwasm/runtime/vmcore-wasm/wasm_interp.c b/core/iwasm/runtime/vmcore-wasm/wasm_interp.c
index 0b219863..47e51e75 100644
--- a/core/iwasm/runtime/vmcore-wasm/wasm_interp.c
+++ b/core/iwasm/runtime/vmcore-wasm/wasm_interp.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_interp.h"
diff --git a/core/iwasm/runtime/vmcore-wasm/wasm_interp.h b/core/iwasm/runtime/vmcore-wasm/wasm_interp.h
index 50bb3d71..e7a1d779 100644
--- a/core/iwasm/runtime/vmcore-wasm/wasm_interp.h
+++ b/core/iwasm/runtime/vmcore-wasm/wasm_interp.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_INTERP_H
diff --git a/core/iwasm/runtime/vmcore-wasm/wasm_loader.c b/core/iwasm/runtime/vmcore-wasm/wasm_loader.c
index 0b2760be..81144c31 100644
--- a/core/iwasm/runtime/vmcore-wasm/wasm_loader.c
+++ b/core/iwasm/runtime/vmcore-wasm/wasm_loader.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_loader.h"
diff --git a/core/iwasm/runtime/vmcore-wasm/wasm_loader.h b/core/iwasm/runtime/vmcore-wasm/wasm_loader.h
index 1a393960..c0a982eb 100644
--- a/core/iwasm/runtime/vmcore-wasm/wasm_loader.h
+++ b/core/iwasm/runtime/vmcore-wasm/wasm_loader.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 #ifndef _WASM_LOADER_H
 #define _WASM_LOADER_H
diff --git a/core/iwasm/runtime/vmcore-wasm/wasm_native.h b/core/iwasm/runtime/vmcore-wasm/wasm_native.h
index 74b0fb05..8efd0efe 100644
--- a/core/iwasm/runtime/vmcore-wasm/wasm_native.h
+++ b/core/iwasm/runtime/vmcore-wasm/wasm_native.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_NATIVE_H
diff --git a/core/iwasm/runtime/vmcore-wasm/wasm_opcode.h b/core/iwasm/runtime/vmcore-wasm/wasm_opcode.h
index 2917bf42..4868be34 100644
--- a/core/iwasm/runtime/vmcore-wasm/wasm_opcode.h
+++ b/core/iwasm/runtime/vmcore-wasm/wasm_opcode.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_OPCODE_H
diff --git a/core/iwasm/runtime/vmcore-wasm/wasm_runtime.c b/core/iwasm/runtime/vmcore-wasm/wasm_runtime.c
index cfd10ff0..f6f4ef03 100644
--- a/core/iwasm/runtime/vmcore-wasm/wasm_runtime.c
+++ b/core/iwasm/runtime/vmcore-wasm/wasm_runtime.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_runtime.h"
diff --git a/core/iwasm/runtime/vmcore-wasm/wasm_runtime.h b/core/iwasm/runtime/vmcore-wasm/wasm_runtime.h
index 2eb12b75..47cc201e 100644
--- a/core/iwasm/runtime/vmcore-wasm/wasm_runtime.h
+++ b/core/iwasm/runtime/vmcore-wasm/wasm_runtime.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_RUNTIME_H
diff --git a/core/iwasm/runtime/vmcore-wasm/wasm_thread.h b/core/iwasm/runtime/vmcore-wasm/wasm_thread.h
index a1844f14..0bdb3f50 100644
--- a/core/iwasm/runtime/vmcore-wasm/wasm_thread.h
+++ b/core/iwasm/runtime/vmcore-wasm/wasm_thread.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WASM_RUNTIME_THREAD_H
diff --git a/core/shared-lib/coap/Makefile b/core/shared-lib/coap/Makefile
index 91353268..efb3b6a1 100644
--- a/core/shared-lib/coap/Makefile
+++ b/core/shared-lib/coap/Makefile
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 COAP_ROOT=${ZEPHYR_BASE}/subsys/aee/Beihai/runtime/utils/coap
 subdir-ccflags-y += -I${COAP_ROOT}/er-coap -I${COAP_ROOT}/extension
diff --git a/core/shared-lib/coap/er-coap/Makefile b/core/shared-lib/coap/er-coap/Makefile
index d2ba2cdc..1defea13 100644
--- a/core/shared-lib/coap/er-coap/Makefile
+++ b/core/shared-lib/coap/er-coap/Makefile
@@ -1,15 +1,4 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 obj-y += er-coap.o
diff --git a/core/shared-lib/coap/extension/Makefile b/core/shared-lib/coap/extension/Makefile
index 69f88738..32d65d0b 100644
--- a/core/shared-lib/coap/extension/Makefile
+++ b/core/shared-lib/coap/extension/Makefile
@@ -1,15 +1,4 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 obj-y += coap_over_tcp.o
diff --git a/core/shared-lib/coap/extension/coap_conversion.c b/core/shared-lib/coap/extension/coap_conversion.c
index 4c0819c9..6251499d 100644
--- a/core/shared-lib/coap/extension/coap_conversion.c
+++ b/core/shared-lib/coap/extension/coap_conversion.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "coap_ext.h"
diff --git a/core/shared-lib/coap/extension/coap_ext.h b/core/shared-lib/coap/extension/coap_ext.h
index a71596b5..416393f1 100755
--- a/core/shared-lib/coap/extension/coap_ext.h
+++ b/core/shared-lib/coap/extension/coap_ext.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef COAP_EXTENSION_COAP_EXT_H_
diff --git a/core/shared-lib/coap/extension/coap_over_tcp.c b/core/shared-lib/coap/extension/coap_over_tcp.c
index ae50e4c2..ee0dbd27 100755
--- a/core/shared-lib/coap/extension/coap_over_tcp.c
+++ b/core/shared-lib/coap/extension/coap_over_tcp.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <string.h>
diff --git a/core/shared-lib/coap/extension/coap_platforms.h b/core/shared-lib/coap/extension/coap_platforms.h
index e3a1ac4c..be5302b0 100755
--- a/core/shared-lib/coap/extension/coap_platforms.h
+++ b/core/shared-lib/coap/extension/coap_platforms.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef COAP_PLATFORMS_H_
diff --git a/core/shared-lib/coap/lib_coap.cmake b/core/shared-lib/coap/lib_coap.cmake
index 8a35f3cb..8970e5d6 100644
--- a/core/shared-lib/coap/lib_coap.cmake
+++ b/core/shared-lib/coap/lib_coap.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (LIB_COAP_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/shared-lib/include/bh_common.h b/core/shared-lib/include/bh_common.h
index c8e73cc6..8e309ad7 100644
--- a/core/shared-lib/include/bh_common.h
+++ b/core/shared-lib/include/bh_common.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_COMMON_H
diff --git a/core/shared-lib/include/bh_list.h b/core/shared-lib/include/bh_list.h
index 160cc505..2e429c69 100644
--- a/core/shared-lib/include/bh_list.h
+++ b/core/shared-lib/include/bh_list.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_LIST_H
diff --git a/core/shared-lib/include/bh_log.h b/core/shared-lib/include/bh_log.h
index fd2a88ce..66837ac5 100644
--- a/core/shared-lib/include/bh_log.h
+++ b/core/shared-lib/include/bh_log.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 /**
  * @file   bh_log.h
diff --git a/core/shared-lib/include/bh_memory.h b/core/shared-lib/include/bh_memory.h
index 352137a3..b2c091d2 100644
--- a/core/shared-lib/include/bh_memory.h
+++ b/core/shared-lib/include/bh_memory.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_MEMORY_H
diff --git a/core/shared-lib/include/bh_queue.h b/core/shared-lib/include/bh_queue.h
index d6f322e0..56f8b856 100644
--- a/core/shared-lib/include/bh_queue.h
+++ b/core/shared-lib/include/bh_queue.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_QUEUE_H
diff --git a/core/shared-lib/include/bni.h b/core/shared-lib/include/bni.h
index 36e797fd..437cf41d 100644
--- a/core/shared-lib/include/bni.h
+++ b/core/shared-lib/include/bni.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 /**
  * @file   bni.h
diff --git a/core/shared-lib/include/config.h b/core/shared-lib/include/config.h
index 820c835a..4bd0de22 100644
--- a/core/shared-lib/include/config.h
+++ b/core/shared-lib/include/config.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _CONFIG_H_
diff --git a/core/shared-lib/include/errcode.h b/core/shared-lib/include/errcode.h
index 5fc81cb8..7c952a1e 100755
--- a/core/shared-lib/include/errcode.h
+++ b/core/shared-lib/include/errcode.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 /**
  * @file   errcode.h
diff --git a/core/shared-lib/include/jeff_export.h b/core/shared-lib/include/jeff_export.h
index 3e45adb8..e9f4128d 100644
--- a/core/shared-lib/include/jeff_export.h
+++ b/core/shared-lib/include/jeff_export.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 /**
  * @file   jeff-export.h
diff --git a/core/shared-lib/include/korp_types.h b/core/shared-lib/include/korp_types.h
index daf6d6f4..14c15c2f 100755
--- a/core/shared-lib/include/korp_types.h
+++ b/core/shared-lib/include/korp_types.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _KORP_TYPES_H
diff --git a/core/shared-lib/include/mem_alloc.h b/core/shared-lib/include/mem_alloc.h
index acda4a91..3e1cf957 100644
--- a/core/shared-lib/include/mem_alloc.h
+++ b/core/shared-lib/include/mem_alloc.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef __MEM_ALLOC_H
diff --git a/core/shared-lib/mem-alloc/bh_memory.c b/core/shared-lib/mem-alloc/bh_memory.c
index f0a6641e..45c252b1 100644
--- a/core/shared-lib/mem-alloc/bh_memory.c
+++ b/core/shared-lib/mem-alloc/bh_memory.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_config.h"
diff --git a/core/shared-lib/mem-alloc/ems/ems_alloc.c b/core/shared-lib/mem-alloc/ems/ems_alloc.c
index ca575f35..a9c5c6e7 100644
--- a/core/shared-lib/mem-alloc/ems/ems_alloc.c
+++ b/core/shared-lib/mem-alloc/ems/ems_alloc.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "ems_gc_internal.h"
diff --git a/core/shared-lib/mem-alloc/ems/ems_gc.h b/core/shared-lib/mem-alloc/ems/ems_gc.h
index 38aba489..9c705db1 100644
--- a/core/shared-lib/mem-alloc/ems/ems_gc.h
+++ b/core/shared-lib/mem-alloc/ems/ems_gc.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 /**
diff --git a/core/shared-lib/mem-alloc/ems/ems_gc_internal.h b/core/shared-lib/mem-alloc/ems/ems_gc_internal.h
index 51308d2a..9ee66921 100644
--- a/core/shared-lib/mem-alloc/ems/ems_gc_internal.h
+++ b/core/shared-lib/mem-alloc/ems/ems_gc_internal.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _EMS_GC_INTERNAL_H
diff --git a/core/shared-lib/mem-alloc/ems/ems_hmu.c b/core/shared-lib/mem-alloc/ems/ems_hmu.c
index 6b612d8f..0a6d1abc 100644
--- a/core/shared-lib/mem-alloc/ems/ems_hmu.c
+++ b/core/shared-lib/mem-alloc/ems/ems_hmu.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "ems_gc_internal.h"
diff --git a/core/shared-lib/mem-alloc/ems/ems_kfc.c b/core/shared-lib/mem-alloc/ems/ems_kfc.c
index 4409d65d..8b619fdb 100644
--- a/core/shared-lib/mem-alloc/ems/ems_kfc.c
+++ b/core/shared-lib/mem-alloc/ems/ems_kfc.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "ems_gc_internal.h"
diff --git a/core/shared-lib/mem-alloc/mem_alloc.c b/core/shared-lib/mem-alloc/mem_alloc.c
index c19d669e..72670ff5 100644
--- a/core/shared-lib/mem-alloc/mem_alloc.c
+++ b/core/shared-lib/mem-alloc/mem_alloc.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "mem_alloc.h"
diff --git a/core/shared-lib/mem-alloc/mem_alloc.cmake b/core/shared-lib/mem-alloc/mem_alloc.cmake
index 28372ade..2a224bf5 100644
--- a/core/shared-lib/mem-alloc/mem_alloc.cmake
+++ b/core/shared-lib/mem-alloc/mem_alloc.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 
 set (MEM_ALLOC_DIR ${CMAKE_CURRENT_LIST_DIR})
diff --git a/core/shared-lib/platform/CMakeLists.txt b/core/shared-lib/platform/CMakeLists.txt
index 036ad4e5..0161f67c 100755
--- a/core/shared-lib/platform/CMakeLists.txt
+++ b/core/shared-lib/platform/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 include_directories (./include ../include ./${PLATFORM})
 
diff --git a/core/shared-lib/platform/Makefile b/core/shared-lib/platform/Makefile
index 6e8435d4..cd10597a 100644
--- a/core/shared-lib/platform/Makefile
+++ b/core/shared-lib/platform/Makefile
@@ -1,15 +1,4 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 obj-y += zephyr/
diff --git a/core/shared-lib/platform/alios/bh_assert.c b/core/shared-lib/platform/alios/bh_assert.c
index ba801669..60f3b2de 100644
--- a/core/shared-lib/platform/alios/bh_assert.c
+++ b/core/shared-lib/platform/alios/bh_assert.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/alios/bh_definition.c b/core/shared-lib/platform/alios/bh_definition.c
index 75628322..1bd85b12 100644
--- a/core/shared-lib/platform/alios/bh_definition.c
+++ b/core/shared-lib/platform/alios/bh_definition.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/alios/bh_platform.c b/core/shared-lib/platform/alios/bh_platform.c
index f8ca5735..9e0be0bf 100644
--- a/core/shared-lib/platform/alios/bh_platform.c
+++ b/core/shared-lib/platform/alios/bh_platform.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/alios/bh_platform.h b/core/shared-lib/platform/alios/bh_platform.h
index e23958c9..d15eacd5 100644
--- a/core/shared-lib/platform/alios/bh_platform.h
+++ b/core/shared-lib/platform/alios/bh_platform.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_PLATFORM_H
diff --git a/core/shared-lib/platform/alios/bh_platform_log.c b/core/shared-lib/platform/alios/bh_platform_log.c
index db0ac60f..8c9e114d 100644
--- a/core/shared-lib/platform/alios/bh_platform_log.c
+++ b/core/shared-lib/platform/alios/bh_platform_log.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/alios/bh_time.c b/core/shared-lib/platform/alios/bh_time.c
index e66590bc..cd827477 100644
--- a/core/shared-lib/platform/alios/bh_time.c
+++ b/core/shared-lib/platform/alios/bh_time.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_time.h"
diff --git a/core/shared-lib/platform/alios/shared_platform.cmake b/core/shared-lib/platform/alios/shared_platform.cmake
index 102ec9c7..cce0df72 100644
--- a/core/shared-lib/platform/alios/shared_platform.cmake
+++ b/core/shared-lib/platform/alios/shared_platform.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (PLATFORM_SHARED_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/shared-lib/platform/android/bh_assert.c b/core/shared-lib/platform/android/bh_assert.c
index b52a9aa5..c609fb93 100755
--- a/core/shared-lib/platform/android/bh_assert.c
+++ b/core/shared-lib/platform/android/bh_assert.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/android/bh_definition.c b/core/shared-lib/platform/android/bh_definition.c
index 47ee11ed..4e22ccb4 100755
--- a/core/shared-lib/platform/android/bh_definition.c
+++ b/core/shared-lib/platform/android/bh_definition.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_definition.h"
diff --git a/core/shared-lib/platform/android/bh_platform.h b/core/shared-lib/platform/android/bh_platform.h
index eff38612..14ab95b4 100755
--- a/core/shared-lib/platform/android/bh_platform.h
+++ b/core/shared-lib/platform/android/bh_platform.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_PLATFORM_H
diff --git a/core/shared-lib/platform/android/bh_platform_log.c b/core/shared-lib/platform/android/bh_platform_log.c
index 4ff03192..902ca7d6 100755
--- a/core/shared-lib/platform/android/bh_platform_log.c
+++ b/core/shared-lib/platform/android/bh_platform_log.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/android/bh_thread.c b/core/shared-lib/platform/android/bh_thread.c
index 6e4f4a57..b1007efa 100755
--- a/core/shared-lib/platform/android/bh_thread.c
+++ b/core/shared-lib/platform/android/bh_thread.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_thread.h"
diff --git a/core/shared-lib/platform/android/bh_time.c b/core/shared-lib/platform/android/bh_time.c
index 6dad5962..f108b8ad 100755
--- a/core/shared-lib/platform/android/bh_time.c
+++ b/core/shared-lib/platform/android/bh_time.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_time.h"
diff --git a/core/shared-lib/platform/darwin/bh_assert.c b/core/shared-lib/platform/darwin/bh_assert.c
index b52a9aa5..c609fb93 100644
--- a/core/shared-lib/platform/darwin/bh_assert.c
+++ b/core/shared-lib/platform/darwin/bh_assert.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/darwin/bh_definition.c b/core/shared-lib/platform/darwin/bh_definition.c
index ebd609ac..8fb58d2f 100644
--- a/core/shared-lib/platform/darwin/bh_definition.c
+++ b/core/shared-lib/platform/darwin/bh_definition.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/darwin/bh_platform.c b/core/shared-lib/platform/darwin/bh_platform.c
index 3ff600cf..a1c35233 100644
--- a/core/shared-lib/platform/darwin/bh_platform.c
+++ b/core/shared-lib/platform/darwin/bh_platform.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/darwin/bh_platform.h b/core/shared-lib/platform/darwin/bh_platform.h
index 2715670b..b25e1a88 100644
--- a/core/shared-lib/platform/darwin/bh_platform.h
+++ b/core/shared-lib/platform/darwin/bh_platform.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_PLATFORM_H
diff --git a/core/shared-lib/platform/darwin/bh_platform_log.c b/core/shared-lib/platform/darwin/bh_platform_log.c
index 4ff03192..902ca7d6 100644
--- a/core/shared-lib/platform/darwin/bh_platform_log.c
+++ b/core/shared-lib/platform/darwin/bh_platform_log.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/darwin/bh_thread.c b/core/shared-lib/platform/darwin/bh_thread.c
index 97879aa7..8619a7ad 100644
--- a/core/shared-lib/platform/darwin/bh_thread.c
+++ b/core/shared-lib/platform/darwin/bh_thread.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_thread.h"
diff --git a/core/shared-lib/platform/darwin/bh_time.c b/core/shared-lib/platform/darwin/bh_time.c
index 0627b08d..b8d9e8f8 100644
--- a/core/shared-lib/platform/darwin/bh_time.c
+++ b/core/shared-lib/platform/darwin/bh_time.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_time.h"
diff --git a/core/shared-lib/platform/darwin/shared_platform.cmake b/core/shared-lib/platform/darwin/shared_platform.cmake
index 5b403a09..2fdc1330 100644
--- a/core/shared-lib/platform/darwin/shared_platform.cmake
+++ b/core/shared-lib/platform/darwin/shared_platform.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (PLATFORM_SHARED_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/shared-lib/platform/include/bh_assert.h b/core/shared-lib/platform/include/bh_assert.h
index 585b7763..370f6cea 100644
--- a/core/shared-lib/platform/include/bh_assert.h
+++ b/core/shared-lib/platform/include/bh_assert.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_ASSERT_H
diff --git a/core/shared-lib/platform/include/bh_config.h b/core/shared-lib/platform/include/bh_config.h
index 37904311..0069194d 100644
--- a/core/shared-lib/platform/include/bh_config.h
+++ b/core/shared-lib/platform/include/bh_config.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 /**
diff --git a/core/shared-lib/platform/include/bh_definition.h b/core/shared-lib/platform/include/bh_definition.h
index 7780f413..f7fb8e82 100755
--- a/core/shared-lib/platform/include/bh_definition.h
+++ b/core/shared-lib/platform/include/bh_definition.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_DEFINITION_H
diff --git a/core/shared-lib/platform/include/bh_platform_log.h b/core/shared-lib/platform/include/bh_platform_log.h
index 9f2bac2c..2513055e 100644
--- a/core/shared-lib/platform/include/bh_platform_log.h
+++ b/core/shared-lib/platform/include/bh_platform_log.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef BH_PLATFORM_LOG
diff --git a/core/shared-lib/platform/include/bh_thread.h b/core/shared-lib/platform/include/bh_thread.h
index 5768c8f8..901e615e 100644
--- a/core/shared-lib/platform/include/bh_thread.h
+++ b/core/shared-lib/platform/include/bh_thread.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_THREAD_H
diff --git a/core/shared-lib/platform/include/bh_time.h b/core/shared-lib/platform/include/bh_time.h
index 13b0286f..e2fafbd5 100644
--- a/core/shared-lib/platform/include/bh_time.h
+++ b/core/shared-lib/platform/include/bh_time.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_TIME_H
diff --git a/core/shared-lib/platform/include/bh_types.h b/core/shared-lib/platform/include/bh_types.h
index 74e0dd68..4c4214e0 100644
--- a/core/shared-lib/platform/include/bh_types.h
+++ b/core/shared-lib/platform/include/bh_types.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_TYPES_H
diff --git a/core/shared-lib/platform/linux-sgx/bh_assert.c b/core/shared-lib/platform/linux-sgx/bh_assert.c
index b52a9aa5..c609fb93 100644
--- a/core/shared-lib/platform/linux-sgx/bh_assert.c
+++ b/core/shared-lib/platform/linux-sgx/bh_assert.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/linux-sgx/bh_definition.c b/core/shared-lib/platform/linux-sgx/bh_definition.c
index 42dd639a..5460c5a5 100644
--- a/core/shared-lib/platform/linux-sgx/bh_definition.c
+++ b/core/shared-lib/platform/linux-sgx/bh_definition.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/linux-sgx/bh_platform.c b/core/shared-lib/platform/linux-sgx/bh_platform.c
index d6f4c29c..10c2aecf 100644
--- a/core/shared-lib/platform/linux-sgx/bh_platform.c
+++ b/core/shared-lib/platform/linux-sgx/bh_platform.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_common.h"
diff --git a/core/shared-lib/platform/linux-sgx/bh_platform.h b/core/shared-lib/platform/linux-sgx/bh_platform.h
index 7a835ef8..e4f726b6 100644
--- a/core/shared-lib/platform/linux-sgx/bh_platform.h
+++ b/core/shared-lib/platform/linux-sgx/bh_platform.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_PLATFORM_H
diff --git a/core/shared-lib/platform/linux-sgx/bh_platform_log.c b/core/shared-lib/platform/linux-sgx/bh_platform_log.c
index 4ff03192..902ca7d6 100644
--- a/core/shared-lib/platform/linux-sgx/bh_platform_log.c
+++ b/core/shared-lib/platform/linux-sgx/bh_platform_log.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/linux-sgx/bh_thread.c b/core/shared-lib/platform/linux-sgx/bh_thread.c
index 8730e13c..cfd6aff2 100644
--- a/core/shared-lib/platform/linux-sgx/bh_thread.c
+++ b/core/shared-lib/platform/linux-sgx/bh_thread.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_thread.h"
diff --git a/core/shared-lib/platform/linux-sgx/bh_time.c b/core/shared-lib/platform/linux-sgx/bh_time.c
index 0627b08d..b8d9e8f8 100644
--- a/core/shared-lib/platform/linux-sgx/bh_time.c
+++ b/core/shared-lib/platform/linux-sgx/bh_time.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_time.h"
diff --git a/core/shared-lib/platform/linux-sgx/shared_platform.cmake b/core/shared-lib/platform/linux-sgx/shared_platform.cmake
index 5b403a09..2fdc1330 100644
--- a/core/shared-lib/platform/linux-sgx/shared_platform.cmake
+++ b/core/shared-lib/platform/linux-sgx/shared_platform.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (PLATFORM_SHARED_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/shared-lib/platform/linux/bh_assert.c b/core/shared-lib/platform/linux/bh_assert.c
index b52a9aa5..c609fb93 100644
--- a/core/shared-lib/platform/linux/bh_assert.c
+++ b/core/shared-lib/platform/linux/bh_assert.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/linux/bh_definition.c b/core/shared-lib/platform/linux/bh_definition.c
index ebd609ac..8fb58d2f 100644
--- a/core/shared-lib/platform/linux/bh_definition.c
+++ b/core/shared-lib/platform/linux/bh_definition.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/linux/bh_platform.c b/core/shared-lib/platform/linux/bh_platform.c
index 3ff600cf..a1c35233 100755
--- a/core/shared-lib/platform/linux/bh_platform.c
+++ b/core/shared-lib/platform/linux/bh_platform.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/linux/bh_platform.h b/core/shared-lib/platform/linux/bh_platform.h
index 47172c1f..ddd77a2f 100644
--- a/core/shared-lib/platform/linux/bh_platform.h
+++ b/core/shared-lib/platform/linux/bh_platform.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_PLATFORM_H
diff --git a/core/shared-lib/platform/linux/bh_platform_log.c b/core/shared-lib/platform/linux/bh_platform_log.c
index 4ff03192..902ca7d6 100644
--- a/core/shared-lib/platform/linux/bh_platform_log.c
+++ b/core/shared-lib/platform/linux/bh_platform_log.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/linux/bh_thread.c b/core/shared-lib/platform/linux/bh_thread.c
index d2cdd087..de865a3c 100755
--- a/core/shared-lib/platform/linux/bh_thread.c
+++ b/core/shared-lib/platform/linux/bh_thread.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_thread.h"
diff --git a/core/shared-lib/platform/linux/bh_time.c b/core/shared-lib/platform/linux/bh_time.c
index 0627b08d..b8d9e8f8 100755
--- a/core/shared-lib/platform/linux/bh_time.c
+++ b/core/shared-lib/platform/linux/bh_time.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_time.h"
diff --git a/core/shared-lib/platform/linux/shared_platform.cmake b/core/shared-lib/platform/linux/shared_platform.cmake
index 5b403a09..2fdc1330 100644
--- a/core/shared-lib/platform/linux/shared_platform.cmake
+++ b/core/shared-lib/platform/linux/shared_platform.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (PLATFORM_SHARED_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/shared-lib/platform/vxworks/bh_assert.c b/core/shared-lib/platform/vxworks/bh_assert.c
index b52a9aa5..c609fb93 100644
--- a/core/shared-lib/platform/vxworks/bh_assert.c
+++ b/core/shared-lib/platform/vxworks/bh_assert.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/vxworks/bh_definition.c b/core/shared-lib/platform/vxworks/bh_definition.c
index acdacf7f..1af69e13 100644
--- a/core/shared-lib/platform/vxworks/bh_definition.c
+++ b/core/shared-lib/platform/vxworks/bh_definition.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/vxworks/bh_platform.c b/core/shared-lib/platform/vxworks/bh_platform.c
index 5509a7e0..698c8574 100644
--- a/core/shared-lib/platform/vxworks/bh_platform.c
+++ b/core/shared-lib/platform/vxworks/bh_platform.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/vxworks/bh_platform.h b/core/shared-lib/platform/vxworks/bh_platform.h
index 4fae1e67..acc8ae4d 100644
--- a/core/shared-lib/platform/vxworks/bh_platform.h
+++ b/core/shared-lib/platform/vxworks/bh_platform.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_PLATFORM_H
diff --git a/core/shared-lib/platform/vxworks/bh_platform_log.c b/core/shared-lib/platform/vxworks/bh_platform_log.c
index 4ff03192..902ca7d6 100644
--- a/core/shared-lib/platform/vxworks/bh_platform_log.c
+++ b/core/shared-lib/platform/vxworks/bh_platform_log.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/vxworks/bh_thread.c b/core/shared-lib/platform/vxworks/bh_thread.c
index 8883c37b..b8ddb97d 100644
--- a/core/shared-lib/platform/vxworks/bh_thread.c
+++ b/core/shared-lib/platform/vxworks/bh_thread.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_thread.h"
diff --git a/core/shared-lib/platform/vxworks/bh_time.c b/core/shared-lib/platform/vxworks/bh_time.c
index 4cae3588..696c994d 100644
--- a/core/shared-lib/platform/vxworks/bh_time.c
+++ b/core/shared-lib/platform/vxworks/bh_time.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_time.h"
diff --git a/core/shared-lib/platform/vxworks/shared_platform.cmake b/core/shared-lib/platform/vxworks/shared_platform.cmake
index 5b403a09..2fdc1330 100644
--- a/core/shared-lib/platform/vxworks/shared_platform.cmake
+++ b/core/shared-lib/platform/vxworks/shared_platform.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (PLATFORM_SHARED_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/shared-lib/platform/win32/bh_assert.c b/core/shared-lib/platform/win32/bh_assert.c
index b0bbbcbe..17106e77 100644
--- a/core/shared-lib/platform/win32/bh_assert.c
+++ b/core/shared-lib/platform/win32/bh_assert.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/win32/bh_definition.c b/core/shared-lib/platform/win32/bh_definition.c
index 058804c6..2d0d4049 100644
--- a/core/shared-lib/platform/win32/bh_definition.c
+++ b/core/shared-lib/platform/win32/bh_definition.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_definition.h"
diff --git a/core/shared-lib/platform/win32/bh_platform.h b/core/shared-lib/platform/win32/bh_platform.h
index c898a747..5a604bc8 100755
--- a/core/shared-lib/platform/win32/bh_platform.h
+++ b/core/shared-lib/platform/win32/bh_platform.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_PLATFORM_H
diff --git a/core/shared-lib/platform/win32/bh_platform_log.c b/core/shared-lib/platform/win32/bh_platform_log.c
index 80bec06c..c9e243f3 100755
--- a/core/shared-lib/platform/win32/bh_platform_log.c
+++ b/core/shared-lib/platform/win32/bh_platform_log.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdio.h>
diff --git a/core/shared-lib/platform/win32/bh_thread.c b/core/shared-lib/platform/win32/bh_thread.c
index ab7e783b..406c3aba 100755
--- a/core/shared-lib/platform/win32/bh_thread.c
+++ b/core/shared-lib/platform/win32/bh_thread.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_thread.h"
diff --git a/core/shared-lib/platform/win32/bh_time.c b/core/shared-lib/platform/win32/bh_time.c
index c8d426c4..ab34b6b5 100755
--- a/core/shared-lib/platform/win32/bh_time.c
+++ b/core/shared-lib/platform/win32/bh_time.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdio.h>
diff --git a/core/shared-lib/platform/zephyr/Makefile b/core/shared-lib/platform/zephyr/Makefile
index 4528ff53..c1520f36 100644
--- a/core/shared-lib/platform/zephyr/Makefile
+++ b/core/shared-lib/platform/zephyr/Makefile
@@ -1,15 +1,4 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 obj-y += bh_assert.o bh_definition.o bh_memory.o bh_platform_log.o bh_thread.o bh_time.o
diff --git a/core/shared-lib/platform/zephyr/bh_assert.c b/core/shared-lib/platform/zephyr/bh_assert.c
index 121adddf..ad320598 100644
--- a/core/shared-lib/platform/zephyr/bh_assert.c
+++ b/core/shared-lib/platform/zephyr/bh_assert.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/zephyr/bh_definition.c b/core/shared-lib/platform/zephyr/bh_definition.c
index 5602c594..aae3ed82 100644
--- a/core/shared-lib/platform/zephyr/bh_definition.c
+++ b/core/shared-lib/platform/zephyr/bh_definition.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/zephyr/bh_platform.c b/core/shared-lib/platform/zephyr/bh_platform.c
index 7c4263b3..dd0e6b50 100755
--- a/core/shared-lib/platform/zephyr/bh_platform.c
+++ b/core/shared-lib/platform/zephyr/bh_platform.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/zephyr/bh_platform.h b/core/shared-lib/platform/zephyr/bh_platform.h
index 2602bee3..44614a15 100644
--- a/core/shared-lib/platform/zephyr/bh_platform.h
+++ b/core/shared-lib/platform/zephyr/bh_platform.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _BH_PLATFORM_H
diff --git a/core/shared-lib/platform/zephyr/bh_platform_log.c b/core/shared-lib/platform/zephyr/bh_platform_log.c
index c418cd81..aab7a795 100644
--- a/core/shared-lib/platform/zephyr/bh_platform_log.c
+++ b/core/shared-lib/platform/zephyr/bh_platform_log.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_platform.h"
diff --git a/core/shared-lib/platform/zephyr/bh_thread.c b/core/shared-lib/platform/zephyr/bh_thread.c
index 99dd1a24..63586c73 100755
--- a/core/shared-lib/platform/zephyr/bh_thread.c
+++ b/core/shared-lib/platform/zephyr/bh_thread.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_thread.h"
diff --git a/core/shared-lib/platform/zephyr/bh_time.c b/core/shared-lib/platform/zephyr/bh_time.c
index 9fe2bdbb..b6db78ea 100755
--- a/core/shared-lib/platform/zephyr/bh_time.c
+++ b/core/shared-lib/platform/zephyr/bh_time.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_time.h"
diff --git a/core/shared-lib/platform/zephyr/shared_platform.cmake b/core/shared-lib/platform/zephyr/shared_platform.cmake
index 102ec9c7..cce0df72 100644
--- a/core/shared-lib/platform/zephyr/shared_platform.cmake
+++ b/core/shared-lib/platform/zephyr/shared_platform.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (PLATFORM_SHARED_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/core/shared-lib/shared_lib.cmake b/core/shared-lib/shared_lib.cmake
index 7c131940..e933d116 100644
--- a/core/shared-lib/shared_lib.cmake
+++ b/core/shared-lib/shared_lib.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 include (${CMAKE_CURRENT_LIST_DIR}/utils/shared_utils.cmake)
 include (${CMAKE_CURRENT_LIST_DIR}/mem-alloc/mem_alloc.cmake)
diff --git a/core/shared-lib/utils/CMakeLists.txt b/core/shared-lib/utils/CMakeLists.txt
index 1f2e561c..e2b37b9e 100644
--- a/core/shared-lib/utils/CMakeLists.txt
+++ b/core/shared-lib/utils/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 include_directories (. ../include ../platform/include ../platform/${PLATFORM} coap/er-coap coap/extension)
 
diff --git a/core/shared-lib/utils/Makefile b/core/shared-lib/utils/Makefile
index 0a2104cf..b5612a07 100644
--- a/core/shared-lib/utils/Makefile
+++ b/core/shared-lib/utils/Makefile
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 obj-y += bh_list.o bh_log.o attr-container.o bh_queue.o
 obj-y += coap/
diff --git a/core/shared-lib/utils/bh_list.c b/core/shared-lib/utils/bh_list.c
index 0c15ff51..9d6727af 100644
--- a/core/shared-lib/utils/bh_list.c
+++ b/core/shared-lib/utils/bh_list.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_list.h"
diff --git a/core/shared-lib/utils/bh_log.c b/core/shared-lib/utils/bh_log.c
index 58591fb6..0a7de033 100644
--- a/core/shared-lib/utils/bh_log.c
+++ b/core/shared-lib/utils/bh_log.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 /**
  * @file   bh_log.c
diff --git a/core/shared-lib/utils/bh_queue.c b/core/shared-lib/utils/bh_queue.c
index 980fb2ed..1a437995 100644
--- a/core/shared-lib/utils/bh_queue.c
+++ b/core/shared-lib/utils/bh_queue.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "bh_queue.h"
diff --git a/core/shared-lib/utils/runtime_timer.c b/core/shared-lib/utils/runtime_timer.c
index 5b9c344f..341e434f 100644
--- a/core/shared-lib/utils/runtime_timer.c
+++ b/core/shared-lib/utils/runtime_timer.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "runtime_timer.h"
diff --git a/core/shared-lib/utils/runtime_timer.h b/core/shared-lib/utils/runtime_timer.h
index efe25bbb..eb0ea9bc 100644
--- a/core/shared-lib/utils/runtime_timer.h
+++ b/core/shared-lib/utils/runtime_timer.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef LIB_BASE_RUNTIME_TIMER_H_
diff --git a/core/shared-lib/utils/shared_utils.cmake b/core/shared-lib/utils/shared_utils.cmake
index 910ea871..ceaf02c7 100644
--- a/core/shared-lib/utils/shared_utils.cmake
+++ b/core/shared-lib/utils/shared_utils.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set (UTILS_SHARED_DIR ${CMAKE_CURRENT_LIST_DIR})
 
diff --git a/samples/gui/lvgl-native-ui-app/CMakeLists.txt b/samples/gui/lvgl-native-ui-app/CMakeLists.txt
index ce40ffa8..ed73b2a4 100644
--- a/samples/gui/lvgl-native-ui-app/CMakeLists.txt
+++ b/samples/gui/lvgl-native-ui-app/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 cmake_minimum_required (VERSION 2.8.2)
 message ("lvgl_native_ui_app...")
diff --git a/samples/gui/lvgl-native-ui-app/main.c b/samples/gui/lvgl-native-ui-app/main.c
index 1e778385..aeff2f78 100644
--- a/samples/gui/lvgl-native-ui-app/main.c
+++ b/samples/gui/lvgl-native-ui-app/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 /**
diff --git a/samples/gui/lvgl-native-ui-app/system_header.h b/samples/gui/lvgl-native-ui-app/system_header.h
index 9c8b1d23..41d92386 100644
--- a/samples/gui/lvgl-native-ui-app/system_header.h
+++ b/samples/gui/lvgl-native-ui-app/system_header.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdio.h>
diff --git a/samples/gui/wasm-apps/lvgl-compatible/Makefile b/samples/gui/wasm-apps/lvgl-compatible/Makefile
index 4cea928a..77dfff72 100644
--- a/samples/gui/wasm-apps/lvgl-compatible/Makefile
+++ b/samples/gui/wasm-apps/lvgl-compatible/Makefile
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 CC = emcc
 APP_DIR = ${shell pwd}
diff --git a/samples/gui/wasm-apps/lvgl-compatible/src/main.c b/samples/gui/wasm-apps/lvgl-compatible/src/main.c
index 8f2c37a5..bb8fe035 100644
--- a/samples/gui/wasm-apps/lvgl-compatible/src/main.c
+++ b/samples/gui/wasm-apps/lvgl-compatible/src/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdlib.h>
diff --git a/samples/gui/wasm-apps/wgl/Makefile b/samples/gui/wasm-apps/wgl/Makefile
index 4df65bf8..73c9a9f5 100644
--- a/samples/gui/wasm-apps/wgl/Makefile
+++ b/samples/gui/wasm-apps/wgl/Makefile
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 CC = emcc
 APP_DIR = ${shell pwd}
diff --git a/samples/gui/wasm-apps/wgl/src/main.c b/samples/gui/wasm-apps/wgl/src/main.c
index bcd9f8ce..feebd060 100644
--- a/samples/gui/wasm-apps/wgl/src/main.c
+++ b/samples/gui/wasm-apps/wgl/src/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdlib.h>
diff --git a/samples/gui/wasm-runtime-wgl/src/platform/linux/main.c b/samples/gui/wasm-runtime-wgl/src/platform/linux/main.c
index 24cae03d..e8671532 100644
--- a/samples/gui/wasm-runtime-wgl/src/platform/linux/main.c
+++ b/samples/gui/wasm-runtime-wgl/src/platform/linux/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 extern void iwasm_main(int argc, char *argv[]);
 int main(int argc, char *argv[])
diff --git a/samples/gui/wasm-runtime-wgl/src/platform/zephyr/board_config.h b/samples/gui/wasm-runtime-wgl/src/platform/zephyr/board_config.h
index 1233c300..d7ea279a 100644
--- a/samples/gui/wasm-runtime-wgl/src/platform/zephyr/board_config.h
+++ b/samples/gui/wasm-runtime-wgl/src/platform/zephyr/board_config.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 #ifndef __BOARD_CONFIG_H__
 #define __BOARD_CONFIG_H__
diff --git a/samples/gui/wasm-runtime-wgl/src/platform/zephyr/iwasm_main.c b/samples/gui/wasm-runtime-wgl/src/platform/zephyr/iwasm_main.c
index 48681550..65ae26a8 100644
--- a/samples/gui/wasm-runtime-wgl/src/platform/zephyr/iwasm_main.c
+++ b/samples/gui/wasm-runtime-wgl/src/platform/zephyr/iwasm_main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 #include "bh_platform.h"
 #include "runtime_lib.h"
diff --git a/samples/gui/wasm-runtime-wgl/src/platform/zephyr/main.c b/samples/gui/wasm-runtime-wgl/src/platform/zephyr/main.c
index 708c8ffa..81a8f6bc 100644
--- a/samples/gui/wasm-runtime-wgl/src/platform/zephyr/main.c
+++ b/samples/gui/wasm-runtime-wgl/src/platform/zephyr/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdlib.h>
diff --git a/samples/gui/wasm-runtime-wgl/src/platform/zephyr/pin_config_jlf.h b/samples/gui/wasm-runtime-wgl/src/platform/zephyr/pin_config_jlf.h
index 5381b72d..3cde4ec1 100644
--- a/samples/gui/wasm-runtime-wgl/src/platform/zephyr/pin_config_jlf.h
+++ b/samples/gui/wasm-runtime-wgl/src/platform/zephyr/pin_config_jlf.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 #ifndef __PIN_CONFIG_JLF_H__
 #define __PIN_CONFIG_JLF_H__
diff --git a/samples/gui/wasm-runtime-wgl/src/platform/zephyr/pin_config_stm32.h b/samples/gui/wasm-runtime-wgl/src/platform/zephyr/pin_config_stm32.h
index 0ab295eb..fba36fab 100644
--- a/samples/gui/wasm-runtime-wgl/src/platform/zephyr/pin_config_stm32.h
+++ b/samples/gui/wasm-runtime-wgl/src/platform/zephyr/pin_config_stm32.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 #ifndef __PIN_CONFIG_STM32_H__
 #define __PIN_CONFIG_STM32_H__
diff --git a/samples/gui/wasm-runtime-wgl/zephyr-build/CMakeLists.txt b/samples/gui/wasm-runtime-wgl/zephyr-build/CMakeLists.txt
index 99066ed0..e2fca2cf 100644
--- a/samples/gui/wasm-runtime-wgl/zephyr-build/CMakeLists.txt
+++ b/samples/gui/wasm-runtime-wgl/zephyr-build/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 cmake_minimum_required(VERSION 3.8.2)
 
diff --git a/samples/littlevgl/vgl-native-ui-app/CMakeLists.txt b/samples/littlevgl/vgl-native-ui-app/CMakeLists.txt
index 5b14feb8..6c8ee67b 100644
--- a/samples/littlevgl/vgl-native-ui-app/CMakeLists.txt
+++ b/samples/littlevgl/vgl-native-ui-app/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 cmake_minimum_required (VERSION 2.8.2)
 message ("vgl_native_ui_app...")
diff --git a/samples/littlevgl/vgl-native-ui-app/CMakeLists.txt.in b/samples/littlevgl/vgl-native-ui-app/CMakeLists.txt.in
index 225af16b..bce7b16b 100644
--- a/samples/littlevgl/vgl-native-ui-app/CMakeLists.txt.in
+++ b/samples/littlevgl/vgl-native-ui-app/CMakeLists.txt.in
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 cmake_minimum_required(VERSION 2.8.2)
 
diff --git a/samples/littlevgl/vgl-native-ui-app/lv-drivers/display_indev.h b/samples/littlevgl/vgl-native-ui-app/lv-drivers/display_indev.h
index f1b966e0..3aa6e161 100644
--- a/samples/littlevgl/vgl-native-ui-app/lv-drivers/display_indev.h
+++ b/samples/littlevgl/vgl-native-ui-app/lv-drivers/display_indev.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef DISPLAY_INDEV_H_
diff --git a/samples/littlevgl/vgl-native-ui-app/lv-drivers/linux_display_indev.c b/samples/littlevgl/vgl-native-ui-app/lv-drivers/linux_display_indev.c
index e8bbc521..cf6ff82a 100644
--- a/samples/littlevgl/vgl-native-ui-app/lv-drivers/linux_display_indev.c
+++ b/samples/littlevgl/vgl-native-ui-app/lv-drivers/linux_display_indev.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdio.h>
diff --git a/samples/littlevgl/vgl-native-ui-app/lv-drivers/system_header.h b/samples/littlevgl/vgl-native-ui-app/lv-drivers/system_header.h
index 9c8b1d23..41d92386 100644
--- a/samples/littlevgl/vgl-native-ui-app/lv-drivers/system_header.h
+++ b/samples/littlevgl/vgl-native-ui-app/lv-drivers/system_header.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdio.h>
diff --git a/samples/littlevgl/vgl-native-ui-app/main.c b/samples/littlevgl/vgl-native-ui-app/main.c
index 59d0e6b6..ef26e5e3 100644
--- a/samples/littlevgl/vgl-native-ui-app/main.c
+++ b/samples/littlevgl/vgl-native-ui-app/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 /**
diff --git a/samples/littlevgl/vgl-wasm-runtime/src/platform/linux/display_indev.c b/samples/littlevgl/vgl-wasm-runtime/src/platform/linux/display_indev.c
index 5fe98d42..b9334fbf 100644
--- a/samples/littlevgl/vgl-wasm-runtime/src/platform/linux/display_indev.c
+++ b/samples/littlevgl/vgl-wasm-runtime/src/platform/linux/display_indev.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdio.h>
diff --git a/samples/littlevgl/vgl-wasm-runtime/src/platform/linux/main.c b/samples/littlevgl/vgl-wasm-runtime/src/platform/linux/main.c
index 24cae03d..e8671532 100644
--- a/samples/littlevgl/vgl-wasm-runtime/src/platform/linux/main.c
+++ b/samples/littlevgl/vgl-wasm-runtime/src/platform/linux/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 extern void iwasm_main(int argc, char *argv[]);
 int main(int argc, char *argv[])
diff --git a/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/board_config.h b/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/board_config.h
index 1233c300..d7ea279a 100644
--- a/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/board_config.h
+++ b/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/board_config.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 #ifndef __BOARD_CONFIG_H__
 #define __BOARD_CONFIG_H__
diff --git a/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/display_indev.c b/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/display_indev.c
index 58ac43f7..c1d82729 100644
--- a/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/display_indev.c
+++ b/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/display_indev.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 #include <stdio.h>
 #include <stdbool.h>
diff --git a/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/iwasm_main.c b/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/iwasm_main.c
index 64e27d71..c77a96c6 100644
--- a/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/iwasm_main.c
+++ b/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/iwasm_main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 #include "bh_platform.h"
 #include "runtime_lib.h"
diff --git a/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/main.c b/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/main.c
index 2b91f0b4..c44c54d9 100644
--- a/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/main.c
+++ b/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdlib.h>
diff --git a/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/pin_config_jlf.h b/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/pin_config_jlf.h
index 5381b72d..3cde4ec1 100644
--- a/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/pin_config_jlf.h
+++ b/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/pin_config_jlf.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 #ifndef __PIN_CONFIG_JLF_H__
 #define __PIN_CONFIG_JLF_H__
diff --git a/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/pin_config_stm32.h b/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/pin_config_stm32.h
index 0ab295eb..fba36fab 100644
--- a/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/pin_config_stm32.h
+++ b/samples/littlevgl/vgl-wasm-runtime/src/platform/zephyr/pin_config_stm32.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 #ifndef __PIN_CONFIG_STM32_H__
 #define __PIN_CONFIG_STM32_H__
diff --git a/samples/littlevgl/vgl-wasm-runtime/zephyr-build/CMakeLists.txt b/samples/littlevgl/vgl-wasm-runtime/zephyr-build/CMakeLists.txt
index b59fd4a8..511048d6 100644
--- a/samples/littlevgl/vgl-wasm-runtime/zephyr-build/CMakeLists.txt
+++ b/samples/littlevgl/vgl-wasm-runtime/zephyr-build/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 cmake_minimum_required(VERSION 3.8.2)
 
diff --git a/samples/littlevgl/wasm-apps/Makefile_wasm_app b/samples/littlevgl/wasm-apps/Makefile_wasm_app
index b9003ac8..97046d91 100644
--- a/samples/littlevgl/wasm-apps/Makefile_wasm_app
+++ b/samples/littlevgl/wasm-apps/Makefile_wasm_app
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 CC = emcc
 LVGL_DIR = ${shell pwd}
diff --git a/samples/littlevgl/wasm-apps/build_wasm_app.sh b/samples/littlevgl/wasm-apps/build_wasm_app.sh
index a88d2a76..1bb59e02 100755
--- a/samples/littlevgl/wasm-apps/build_wasm_app.sh
+++ b/samples/littlevgl/wasm-apps/build_wasm_app.sh
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 #!/bin/sh
 if [ ! -d "lvgl" ]; then
diff --git a/samples/littlevgl/wasm-apps/src/display_indev.h b/samples/littlevgl/wasm-apps/src/display_indev.h
index 7188bd44..fe07d9ab 100644
--- a/samples/littlevgl/wasm-apps/src/display_indev.h
+++ b/samples/littlevgl/wasm-apps/src/display_indev.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef DISPLAY_INDEV_H_
diff --git a/samples/littlevgl/wasm-apps/src/main.c b/samples/littlevgl/wasm-apps/src/main.c
index 7bb50c20..c5187d3f 100644
--- a/samples/littlevgl/wasm-apps/src/main.c
+++ b/samples/littlevgl/wasm-apps/src/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 /**
diff --git a/samples/littlevgl/wasm-apps/src/system_header.h b/samples/littlevgl/wasm-apps/src/system_header.h
index 5333432b..8d943c87 100644
--- a/samples/littlevgl/wasm-apps/src/system_header.h
+++ b/samples/littlevgl/wasm-apps/src/system_header.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdio.h>
diff --git a/samples/simple/wasm-apps/connection.c b/samples/simple/wasm-apps/connection.c
index 89aed517..cfaa5ad4 100644
--- a/samples/simple/wasm-apps/connection.c
+++ b/samples/simple/wasm-apps/connection.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_app.h"
diff --git a/samples/simple/wasm-apps/event_publisher.c b/samples/simple/wasm-apps/event_publisher.c
index 96717eec..d86fe1d2 100644
--- a/samples/simple/wasm-apps/event_publisher.c
+++ b/samples/simple/wasm-apps/event_publisher.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_app.h"
diff --git a/samples/simple/wasm-apps/event_subscriber.c b/samples/simple/wasm-apps/event_subscriber.c
index aea0d77f..f7d393fc 100644
--- a/samples/simple/wasm-apps/event_subscriber.c
+++ b/samples/simple/wasm-apps/event_subscriber.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_app.h"
diff --git a/samples/simple/wasm-apps/gui.c b/samples/simple/wasm-apps/gui.c
index b3beb9d0..0ab1a7be 100644
--- a/samples/simple/wasm-apps/gui.c
+++ b/samples/simple/wasm-apps/gui.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 
diff --git a/samples/simple/wasm-apps/gui_lvgl_compatible.c b/samples/simple/wasm-apps/gui_lvgl_compatible.c
index 8f2c37a5..bb8fe035 100644
--- a/samples/simple/wasm-apps/gui_lvgl_compatible.c
+++ b/samples/simple/wasm-apps/gui_lvgl_compatible.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdlib.h>
diff --git a/samples/simple/wasm-apps/request_handler.c b/samples/simple/wasm-apps/request_handler.c
index b4820930..230637d5 100644
--- a/samples/simple/wasm-apps/request_handler.c
+++ b/samples/simple/wasm-apps/request_handler.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_app.h"
diff --git a/samples/simple/wasm-apps/request_sender.c b/samples/simple/wasm-apps/request_sender.c
index f1a9952b..1e885e57 100644
--- a/samples/simple/wasm-apps/request_sender.c
+++ b/samples/simple/wasm-apps/request_sender.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_app.h"
diff --git a/samples/simple/wasm-apps/sensor.c b/samples/simple/wasm-apps/sensor.c
index 32705889..efdd8bde 100644
--- a/samples/simple/wasm-apps/sensor.c
+++ b/samples/simple/wasm-apps/sensor.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_app.h"
diff --git a/samples/simple/wasm-apps/timer.c b/samples/simple/wasm-apps/timer.c
index d6605fe4..b6119d97 100644
--- a/samples/simple/wasm-apps/timer.c
+++ b/samples/simple/wasm-apps/timer.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "wasm_app.h"
diff --git a/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/application.html b/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/application.html
index 55852977..594c3e9a 100644
--- a/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/application.html
+++ b/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/application.html
@@ -1,16 +1,5 @@
 <!-- /* Copyright (C) 2019 Intel Corporation.  All rights reserved.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */ -->
 {% load static %}
 <!DOCTYPE html>
diff --git a/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/appstore.html b/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/appstore.html
index 36f1fb8d..8b75b33b 100644
--- a/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/appstore.html
+++ b/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/appstore.html
@@ -1,16 +1,5 @@
 <!-- /* Copyright (C) 2019 Intel Corporation.  All rights reserved.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */ -->
 {% load static %}
 <!DOCTYPE html>
diff --git a/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/help.html b/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/help.html
index 2e77cfad..38733e0e 100755
--- a/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/help.html
+++ b/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/help.html
@@ -1,16 +1,5 @@
 <!-- /* Copyright (C) 2019 Intel Corporation.  All rights reserved.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */ -->
 {% load static %}
 <!DOCTYPE html>
@@ -107,4 +96,4 @@
         </div>
     </body>
 
-</html>
\ No newline at end of file
+</html>
diff --git a/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/mysite.html b/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/mysite.html
index 88f0e923..24e5e54c 100644
--- a/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/mysite.html
+++ b/test-tools/IoT-APP-Store-Demo/wasm_django/devices/templates/mysite.html
@@ -1,16 +1,5 @@
 <!-- /* Copyright (C) 2019 Intel Corporation.  All rights reserved.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */ -->
 {% load static %}
 <!DOCTYPE html>
@@ -96,4 +85,4 @@ var dlist = {{dlist|safe}};/*Devices List that render to the current page*/
 <script type="text/javascript" src="{%static 'js/index.js'%}"></script>
 </body>
 
-</html>
\ No newline at end of file
+</html>
diff --git a/test-tools/IoT-APP-Store-Demo/wasm_django/devices/views.py b/test-tools/IoT-APP-Store-Demo/wasm_django/devices/views.py
index 4fd4c09c..cc11a27a 100755
--- a/test-tools/IoT-APP-Store-Demo/wasm_django/devices/views.py
+++ b/test-tools/IoT-APP-Store-Demo/wasm_django/devices/views.py
@@ -1,17 +1,6 @@
 '''
  /* Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 '''
 
diff --git a/test-tools/IoT-APP-Store-Demo/wasm_django/server/wasm_server.py b/test-tools/IoT-APP-Store-Demo/wasm_django/server/wasm_server.py
index 1754b368..5edeb90a 100755
--- a/test-tools/IoT-APP-Store-Demo/wasm_django/server/wasm_server.py
+++ b/test-tools/IoT-APP-Store-Demo/wasm_django/server/wasm_server.py
@@ -1,17 +1,6 @@
 '''
  /* Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 '''
 import select
diff --git a/test-tools/IoT-APP-Store-Demo/wasm_django/static/css/application.css b/test-tools/IoT-APP-Store-Demo/wasm_django/static/css/application.css
index 5876b942..220d4b61 100644
--- a/test-tools/IoT-APP-Store-Demo/wasm_django/static/css/application.css
+++ b/test-tools/IoT-APP-Store-Demo/wasm_django/static/css/application.css
@@ -1,16 +1,5 @@
 /* Copyright (C) 2019 Intel Corporation.  All rights reserved.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */
 
 {% load static %}
diff --git a/test-tools/IoT-APP-Store-Demo/wasm_django/static/css/appstore.css b/test-tools/IoT-APP-Store-Demo/wasm_django/static/css/appstore.css
index 2c49aa16..1cebcefe 100644
--- a/test-tools/IoT-APP-Store-Demo/wasm_django/static/css/appstore.css
+++ b/test-tools/IoT-APP-Store-Demo/wasm_django/static/css/appstore.css
@@ -1,16 +1,5 @@
 /* Copyright (C) 2019 Intel Corporation.  All rights reserved.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */
 {% load static %}
 <style>
diff --git a/test-tools/IoT-APP-Store-Demo/wasm_django/static/css/index.css b/test-tools/IoT-APP-Store-Demo/wasm_django/static/css/index.css
index 24284188..d459469a 100755
--- a/test-tools/IoT-APP-Store-Demo/wasm_django/static/css/index.css
+++ b/test-tools/IoT-APP-Store-Demo/wasm_django/static/css/index.css
@@ -1,16 +1,5 @@
 /* Copyright (C) 2019 Intel Corporation.  All rights reserved.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */
 {% load static %}
 <style>
diff --git a/test-tools/IoT-APP-Store-Demo/wasm_django/static/js/application.js b/test-tools/IoT-APP-Store-Demo/wasm_django/static/js/application.js
index d359962e..0510fb90 100644
--- a/test-tools/IoT-APP-Store-Demo/wasm_django/static/js/application.js
+++ b/test-tools/IoT-APP-Store-Demo/wasm_django/static/js/application.js
@@ -1,16 +1,5 @@
 /* Copyright (C) 2019 Intel Corporation.  All rights reserved.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */
 
 /*
diff --git a/test-tools/IoT-APP-Store-Demo/wasm_django/static/js/appstore.js b/test-tools/IoT-APP-Store-Demo/wasm_django/static/js/appstore.js
index 911de1f0..71d029ef 100644
--- a/test-tools/IoT-APP-Store-Demo/wasm_django/static/js/appstore.js
+++ b/test-tools/IoT-APP-Store-Demo/wasm_django/static/js/appstore.js
@@ -1,16 +1,5 @@
 /* Copyright (C) 2019 Intel Corporation.  All rights reserved.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */
 
 function setDivCenter(divname)
diff --git a/test-tools/IoT-APP-Store-Demo/wasm_django/static/js/index.js b/test-tools/IoT-APP-Store-Demo/wasm_django/static/js/index.js
index f80f7a59..b5850bd1 100644
--- a/test-tools/IoT-APP-Store-Demo/wasm_django/static/js/index.js
+++ b/test-tools/IoT-APP-Store-Demo/wasm_django/static/js/index.js
@@ -1,16 +1,5 @@
 /* Copyright (C) 2019 Intel Corporation.  All rights reserved.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
+* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */
 
 function setfooterposition(divname)
diff --git a/test-tools/host-tool/CMakeLists.txt b/test-tools/host-tool/CMakeLists.txt
index ea943870..9e185c15 100644
--- a/test-tools/host-tool/CMakeLists.txt
+++ b/test-tools/host-tool/CMakeLists.txt
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #
 
 cmake_minimum_required (VERSION 2.8.3)
diff --git a/test-tools/host-tool/src/host_tool_utils.c b/test-tools/host-tool/src/host_tool_utils.c
index 564bc087..1e9d049e 100644
--- a/test-tools/host-tool/src/host_tool_utils.c
+++ b/test-tools/host-tool/src/host_tool_utils.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include "host_tool_utils.h"
diff --git a/test-tools/host-tool/src/host_tool_utils.h b/test-tools/host-tool/src/host_tool_utils.h
index 33dafb6f..52cc896a 100644
--- a/test-tools/host-tool/src/host_tool_utils.h
+++ b/test-tools/host-tool/src/host_tool_utils.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _HOST_TOOL_UTILS_H_
diff --git a/test-tools/host-tool/src/main.c b/test-tools/host-tool/src/main.c
index e4a3a48d..f30fb1e2 100644
--- a/test-tools/host-tool/src/main.c
+++ b/test-tools/host-tool/src/main.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdbool.h>
diff --git a/test-tools/host-tool/src/transport.c b/test-tools/host-tool/src/transport.c
index 0ccb6276..3287339f 100644
--- a/test-tools/host-tool/src/transport.c
+++ b/test-tools/host-tool/src/transport.c
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #include <stdbool.h>
diff --git a/test-tools/host-tool/src/transport.h b/test-tools/host-tool/src/transport.h
index 6d978d79..2d98c126 100644
--- a/test-tools/host-tool/src/transport.h
+++ b/test-tools/host-tool/src/transport.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef DEPS_APP_MGR_HOST_TOOL_SRC_TRANSPORT_H_
diff --git a/test-tools/toolchain/generate_toolchain.py b/test-tools/toolchain/generate_toolchain.py
index 58b2154f..0a92b8bc 100755
--- a/test-tools/toolchain/generate_toolchain.py
+++ b/test-tools/toolchain/generate_toolchain.py
@@ -1,18 +1,7 @@
 #!/usr/bin/python3
 
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-# 
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-# 
-#     http://www.apache.org/licenses/LICENSE-2.0
-# 
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 import os
 import sys
diff --git a/test-tools/toolchain/sysroot/include/assert.h b/test-tools/toolchain/sysroot/include/assert.h
index 5dbcbd56..534a90de 100644
--- a/test-tools/toolchain/sysroot/include/assert.h
+++ b/test-tools/toolchain/sysroot/include/assert.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WAMR_LIBC_ASSERT_H
diff --git a/test-tools/toolchain/sysroot/include/ctype.h b/test-tools/toolchain/sysroot/include/ctype.h
index c23308f1..20a71dc7 100644
--- a/test-tools/toolchain/sysroot/include/ctype.h
+++ b/test-tools/toolchain/sysroot/include/ctype.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WAMR_LIBC_CTYPE_H
diff --git a/test-tools/toolchain/sysroot/include/errno.h b/test-tools/toolchain/sysroot/include/errno.h
index 69d9ec4d..9e9cca19 100644
--- a/test-tools/toolchain/sysroot/include/errno.h
+++ b/test-tools/toolchain/sysroot/include/errno.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WAMR_LIBC_ERRNO_H
diff --git a/test-tools/toolchain/sysroot/include/fcntl.h b/test-tools/toolchain/sysroot/include/fcntl.h
index 4d6d24da..a67c24a2 100644
--- a/test-tools/toolchain/sysroot/include/fcntl.h
+++ b/test-tools/toolchain/sysroot/include/fcntl.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WAMR_LIBC_FCNTL_H
diff --git a/test-tools/toolchain/sysroot/include/inttypes.h b/test-tools/toolchain/sysroot/include/inttypes.h
index f79aaf5b..ac069d39 100644
--- a/test-tools/toolchain/sysroot/include/inttypes.h
+++ b/test-tools/toolchain/sysroot/include/inttypes.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WAMR_LIBC_INTTYPES_H
diff --git a/test-tools/toolchain/sysroot/include/limits.h b/test-tools/toolchain/sysroot/include/limits.h
index 6e6fd85f..ba153887 100644
--- a/test-tools/toolchain/sysroot/include/limits.h
+++ b/test-tools/toolchain/sysroot/include/limits.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WAMR_LIBC_LIMITS_H
diff --git a/test-tools/toolchain/sysroot/include/stdbool.h b/test-tools/toolchain/sysroot/include/stdbool.h
index e87c74b5..29e03f9d 100644
--- a/test-tools/toolchain/sysroot/include/stdbool.h
+++ b/test-tools/toolchain/sysroot/include/stdbool.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WAMR_LIBC_STDBOOL_H
diff --git a/test-tools/toolchain/sysroot/include/stdint.h b/test-tools/toolchain/sysroot/include/stdint.h
index 5054e80f..4734c00c 100644
--- a/test-tools/toolchain/sysroot/include/stdint.h
+++ b/test-tools/toolchain/sysroot/include/stdint.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WAMR_LIBC_STDINT_H
diff --git a/test-tools/toolchain/sysroot/include/stdio.h b/test-tools/toolchain/sysroot/include/stdio.h
index cccf2296..d7350f33 100644
--- a/test-tools/toolchain/sysroot/include/stdio.h
+++ b/test-tools/toolchain/sysroot/include/stdio.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WAMR_LIBC_STDIO_H
diff --git a/test-tools/toolchain/sysroot/include/stdlib.h b/test-tools/toolchain/sysroot/include/stdlib.h
index d65f6184..8fdd17c2 100644
--- a/test-tools/toolchain/sysroot/include/stdlib.h
+++ b/test-tools/toolchain/sysroot/include/stdlib.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WAMR_LIBC_STDLIB_H
diff --git a/test-tools/toolchain/sysroot/include/string.h b/test-tools/toolchain/sysroot/include/string.h
index 2921de4e..c5d17e8d 100644
--- a/test-tools/toolchain/sysroot/include/string.h
+++ b/test-tools/toolchain/sysroot/include/string.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WAMR_LIBC_STRING_H
diff --git a/test-tools/toolchain/sysroot/include/strings.h b/test-tools/toolchain/sysroot/include/strings.h
index d29dc512..7f1bec6f 100644
--- a/test-tools/toolchain/sysroot/include/strings.h
+++ b/test-tools/toolchain/sysroot/include/strings.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WAMR_LIBC_STRINGS_H
diff --git a/test-tools/toolchain/sysroot/include/time.h b/test-tools/toolchain/sysroot/include/time.h
index c08f3bf5..5da37a58 100644
--- a/test-tools/toolchain/sysroot/include/time.h
+++ b/test-tools/toolchain/sysroot/include/time.h
@@ -1,17 +1,6 @@
 /*
  * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  */
 
 #ifndef _WAMR_LIBC_TIME_H
diff --git a/test-tools/toolchain/wamr_toolchain.cmake b/test-tools/toolchain/wamr_toolchain.cmake
index 97b730ea..4c925bd0 100644
--- a/test-tools/toolchain/wamr_toolchain.cmake
+++ b/test-tools/toolchain/wamr_toolchain.cmake
@@ -1,16 +1,5 @@
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 SET(CMAKE_SYSTEM_NAME Linux)
 SET(CMAKE_SYSTEM_PROCESSOR wasm32)