cross-platform: macOS dylib (shared library) support [passing all the tests]

Author: obastemur

bin/ChakraCore/CMakeLists.txt

@@ -32,6 +32,8 @@ if(CMAKE_SYSTEM_NAME STREQUAL Linux)
     -Wl,--no-whole-archive
     -Wl,--end-group
     )
+elseif(CMAKE_SYSTEM_NAME STREQUAL Darwin)
+  set(LINKER_START_GROUP -Wl,-force_load,)
 endif()
 
 # common link deps

bin/ChakraCore/ChakraCoreDllFunc.cpp

@@ -16,6 +16,16 @@
 #include "Base/VTuneChakraProfile.h"
 #endif
 
+#ifdef __APPLE__
+// dummy usage of JSRT to force export JSRT on dylib
+#include "ChakraCore.h"
+void DummyJSRTCall() {
+    JsRuntimeHandle *runtime;
+    JsRuntimeAttributes attr;
+    JsCreateRuntime(attr, nullptr, runtime);
+}
+#endif
+
 extern HANDLE g_hInstance;
 #ifdef _WIN32
 static ATOM  lockedDll = 0;
@@ -61,7 +71,7 @@ static BOOL AttachProcess(HANDLE hmod)
 #endif
 #ifdef VTUNE_PROFILING
     VTuneChakraProfile::Register();
-#endif 
+#endif
     ValueType::Initialize();
     ThreadContext::GlobalInitialize();
 
@@ -166,7 +176,7 @@ EXTERN_C BOOL WINAPI DllMain(HINSTANCE hmod, DWORD dwReason, PVOID pvReserved)
 #endif
 #ifdef VTUNE_PROFILING
         VTuneChakraProfile::UnRegister();
-#endif 
+#endif
 
         // don't do anything if we are in forceful shutdown
         // try to clean up handles in graceful shutdown

lib/Jsrt/ChakraCommon.h

@@ -61,10 +61,16 @@ typedef BYTE* ChakraBytePtr;
 #define CHAKRA_CALLBACK
 #endif // __i386__
 
+#ifndef _WIN32
+#define SET_API_VISIBILITY __attribute__((visibility("default")))
+#else
+#define SET_API_VISIBILITY
+#endif
+
 #ifdef __cplusplus
-#define CHAKRA_API extern "C" JsErrorCode
+#define CHAKRA_API SET_API_VISIBILITY extern "C" JsErrorCode
 #else
-#define CHAKRA_API JsErrorCode
+#define CHAKRA_API SET_API_VISIBILITY extern JsErrorCode
 #endif
 
 #include <stddef.h>  // for size_t