Enable lazy Orc JIT feature (#732)

The feature is disabled by default, to enable it, please use
`cmake -DWAMR_BUILD_JIT=1 -DWAMR_BUILD_LAZY_JIT=1`
to build iwasm.

core/iwasm/compilation/aot_llvm_lazyjit.cpp

@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2019 Intel Corporation. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+
+#include "aot_llvm_lazyjit.h"
+
+LLVMOrcJITTargetMachineBuilderRef
+LLVMOrcJITTargetMachineBuilderFromTargetMachine(LLVMTargetMachineRef TM);
+
+LLVMOrcLLJITBuilderRef
+LLVMOrcCreateLLJITBuilder(void);
+
+void
+LLVMOrcDisposeLLJITBuilder(LLVMOrcLLJITBuilderRef Builder);
+
+LLVMErrorRef
+LLVMOrcCreateLLJIT(LLVMOrcLLJITRef *Result,
+                   LLVMOrcLLJITBuilderRef Builder);
+
+LLVMErrorRef
+LLVMOrcDisposeLLJIT(LLVMOrcLLJITRef J);
+
+LLVMOrcJITDylibRef
+LLVMOrcLLJITGetMainJITDylib(LLVMOrcLLJITRef J);
+
+const char *
+LLVMOrcLLJITGetTripleString(LLVMOrcLLJITRef J);
+
+char
+LLVMOrcLLJITGetGlobalPrefix(LLVMOrcLLJITRef J);
+
+LLVMErrorRef
+LLVMOrcLLJITAddLLVMIRModule(LLVMOrcLLJITRef J,
+                            LLVMOrcJITDylibRef JD,
+                            LLVMOrcThreadSafeModuleRef TSM);
+
+LLVMErrorRef
+LLVMOrcLLJITLookup(LLVMOrcLLJITRef J,
+                   LLVMOrcJITTargetAddress *Result,
+                   const char *Name);
+
+const char *
+LLVMOrcLLJITGetTripleString(LLVMOrcLLJITRef J);
+
+void
+LLVMOrcLLJITBuilderSetJITTargetMachineBuilder(
+                        LLVMOrcLLJITBuilderRef Builder,
+                        LLVMOrcJITTargetMachineBuilderRef JTMB);
+
+char
+LLVMOrcLLJITGetGlobalPrefix(LLVMOrcLLJITRef J);
+
+#if LLVM_VERSION_MAJOR < 12
+LLVMOrcJITTargetMachineBuilderRef
+LLVMOrcJITTargetMachineBuilderCreateFromTargetMachine(LLVMTargetMachineRef TM)
+{
+    return LLVMOrcJITTargetMachineBuilderFromTargetMachine(TM);
+}
+#endif
+
+LLVMOrcJITDylibRef
+LLVMOrcLLLazyJITGetMainJITDylib(LLVMOrcLLLazyJITRef J)
+{
+    return LLVMOrcLLJITGetMainJITDylib(J);
+}
+
+LLVMOrcLLLazyJITBuilderRef
+LLVMOrcCreateLLLazyJITBuilder(void)
+{
+    return LLVMOrcCreateLLJITBuilder();
+}
+
+void
+LLVMOrcDisposeLLLazyJITBuilder(LLVMOrcLLLazyJITBuilderRef Builder)
+{
+    return LLVMOrcDisposeLLJITBuilder(Builder);
+}
+
+LLVMErrorRef
+LLVMOrcCreateLLLazyJIT(LLVMOrcLLLazyJITRef *Result,
+                       LLVMOrcLLLazyJITBuilderRef Builder)
+{
+    return LLVMOrcCreateLLJIT(Result, Builder);
+}
+
+LLVMErrorRef
+LLVMOrcDisposeLLLazyJIT(LLVMOrcLLLazyJITRef J)
+{
+    return LLVMOrcDisposeLLJIT(J);
+}
+
+LLVMErrorRef
+LLVMOrcLLLazyJITAddLLVMIRModule(LLVMOrcLLLazyJITRef J,
+                                LLVMOrcJITDylibRef JD,
+                                LLVMOrcThreadSafeModuleRef TSM)
+{
+    return LLVMOrcLLJITAddLLVMIRModule(J, JD, TSM);
+}
+
+LLVMErrorRef
+LLVMOrcLLLazyJITLookup(LLVMOrcLLLazyJITRef J,
+                       LLVMOrcJITTargetAddress *Result,
+                       const char *Name)
+{
+    return LLVMOrcLLJITLookup(J, Result, Name);
+}
+
+const char *
+LLVMOrcLLLazyJITGetTripleString(LLVMOrcLLLazyJITRef J)
+{
+    return LLVMOrcLLJITGetTripleString(J);
+}
+
+void
+LLVMOrcLLLazyJITBuilderSetJITTargetMachineBuilder(
+                    LLVMOrcLLLazyJITBuilderRef Builder,
+                    LLVMOrcJITTargetMachineBuilderRef JTMB)
+{
+    return LLVMOrcLLJITBuilderSetJITTargetMachineBuilder(Builder, JTMB);
+}
+
+char
+LLVMOrcLLLazyJITGetGlobalPrefix(LLVMOrcLLLazyJITRef J)
+{
+    return LLVMOrcLLJITGetGlobalPrefix(J);
+}
+