Raise wasi-sdk to 25 and wabt to 1.0.37 (#4187)

Raise wasi-sdk to 25 and wabt to 1.0.37. It includes
  - Refactor CI workflow to install WASI-SDK and WABT from a composite action
  - Use ExternalProject to bring wasm-apps for few samples. file/ wasi-threads/
  - Refactor sample build and test steps in SGX compilation workflow for improved clarity and efficiency (workaround)

Add CMake support for EMSCRIPTEN and WAMRC, update module paths

samples/file/CMakeLists.txt

@@ -6,4 +6,20 @@ project(file)
 
 ################ wasm application ###############
 add_subdirectory(src)
-add_subdirectory(wasm-app)
+
+# Use ExternalProject to avoid incorporating WAMR library compilation flags into the
+# compilation of the wasm application, which could lead to compatibility
+# issues due to different targets.
+# Like: clang: error: unsupported option '-arch' for target 'wasm32-wasi'
+list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR}/../cmake)
+find_package(WASISDK REQUIRED)
+
+include(ExternalProject)
+ExternalProject_Add(wasm-app
+  SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/wasm-app"
+  CONFIGURE_COMMAND ${CMAKE_COMMAND} -S ${CMAKE_CURRENT_SOURCE_DIR}/wasm-app -B build
+                      -DWASI_SDK_PREFIX=${WASISDK_HOME}
+                      -DCMAKE_TOOLCHAIN_FILE=${WASISDK_TOOLCHAIN}
+  BUILD_COMMAND     ${CMAKE_COMMAND} --build build
+  INSTALL_COMMAND   ${CMAKE_COMMAND} --install build --prefix ${CMAKE_CURRENT_BINARY_DIR}
+)

samples/file/wasm-app/CMakeLists.txt

@@ -2,25 +2,10 @@
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 cmake_minimum_required(VERSION 3.14)
-project(wasm-app)
+project(file_wasm)
 
-set (WAMR_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../..)
+set (CMAKE_BUILD_TYPE Debug)  # Otherwise no debug symbols (addr2line)
 
-if (APPLE)
-    set (HAVE_FLAG_SEARCH_PATHS_FIRST 0)
-    set (CMAKE_C_LINK_FLAGS "")
-    set (CMAKE_CXX_LINK_FLAGS "")
-endif ()
-
-set (CMAKE_SYSTEM_PROCESSOR wasm32)
-
-if (NOT DEFINED WASI_SDK_DIR)
-    set (WASI_SDK_DIR               "/opt/wasi-sdk")
-endif ()
-
-set (CMAKE_C_COMPILER_TARGET        "wasm32-wasi")
-set (CMAKE_C_COMPILER               "${WASI_SDK_DIR}/bin/clang")
-set (CMAKE_C_FLAGS                  "${CMAKE_C_FLAGS} -O3 -Wno-unused-command-line-argument")
-
-add_executable(file.wasm main.c)
-target_link_libraries(file.wasm)
+add_executable(file main.c)
+set_target_properties (file PROPERTIES SUFFIX .wasm)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/file.wasm DESTINATION wasm-app)