Call custom macro set_msvc_crt_flags if users set CRT flags (#405)

Same CRT compile option are reqiured to avoid link errors on Windows.
MD and MDd are choosed by default for release and debug build in LLVM.
If users set MT or MTd flags, they also need to add the flags for
opencl-clang sources using a custom macro set_msvc_crt_flags.

Author: haonanya1

CMakeLists.txt

@@ -298,6 +298,14 @@ add_library(${TARGET_NAME} SHARED
     $<TARGET_OBJECTS:cl_headers>
 )
 
+# Same CRT compile option are reqiured to avoid link errors on Windows.
+# MD and MDd are choosed by default for release and debug build in LLVM.
+# If users set MT or MTd flags, they also need to add the flags for
+# opencl-clang sources using a custom macro set_msvc_crt_flags.
+if(COMMAND set_msvc_crt_flags)
+    set_msvc_crt_flags(${TARGET_NAME})
+endif()
+
 add_dependencies(${TARGET_NAME} CClangCompileOptions)
 
 if (WIN32)