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.h

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2019 Intel Corporation. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+
+#ifndef AOT_LLVM_LAZYJIT_H
+#define AOT_LLVM_LAZYJIT_H
+
+#include "llvm-c/Error.h"
+#include "llvm-c/Orc.h"
+#include "llvm-c/TargetMachine.h"
+#include "llvm-c/Types.h"
+#if LLVM_VERSION_MAJOR >= 12
+#include "llvm-c/LLJIT.h"
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef LLVMOrcLLJITBuilderRef LLVMOrcLLLazyJITBuilderRef;
+
+typedef LLVMOrcLLJITRef LLVMOrcLLLazyJITRef;
+
+LLVMOrcJITTargetMachineBuilderRef
+LLVMOrcJITTargetMachineBuilderCreateFromTargetMachine(LLVMTargetMachineRef TM);
+
+LLVMOrcLLLazyJITBuilderRef
+LLVMOrcCreateLLLazyJITBuilder(void);
+
+void
+LLVMOrcDisposeLLLazyJITBuilder(LLVMOrcLLLazyJITBuilderRef Builder);
+
+LLVMErrorRef
+LLVMOrcCreateLLLazyJIT(LLVMOrcLLLazyJITRef *Result,
+                       LLVMOrcLLLazyJITBuilderRef Builder);
+
+LLVMErrorRef
+LLVMOrcDisposeLLLazyJIT(LLVMOrcLLLazyJITRef J);
+
+LLVMOrcJITDylibRef
+LLVMOrcLLLazyJITGetMainJITDylib(LLVMOrcLLLazyJITRef J);
+
+const char *
+LLVMOrcLLLazyJITGetTripleString(LLVMOrcLLLazyJITRef J);
+
+char
+LLVMOrcLLLazyJITGetGlobalPrefix(LLVMOrcLLLazyJITRef J);
+
+LLVMErrorRef
+LLVMOrcLLLazyJITAddLLVMIRModule(LLVMOrcLLLazyJITRef J,
+                                LLVMOrcJITDylibRef JD,
+                                LLVMOrcThreadSafeModuleRef TSM);
+
+LLVMErrorRef
+LLVMOrcLLLazyJITLookup(LLVMOrcLLLazyJITRef J,
+                       LLVMOrcJITTargetAddress *Result,
+                       const char *Name);
+
+const char *
+LLVMOrcLLLazyJITGetTripleString(LLVMOrcLLLazyJITRef J);
+
+void
+LLVMOrcLLLazyJITBuilderSetJITTargetMachineBuilder(
+                        LLVMOrcLLLazyJITBuilderRef Builder,
+                        LLVMOrcJITTargetMachineBuilderRef JTMB);
+
+char
+LLVMOrcLLLazyJITGetGlobalPrefix(LLVMOrcLLLazyJITRef J);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* end of AOT_LLVM_LAZYJIT_H */
+