Fix warning to be compatible with Windows

Author: mcbarton

include/clang/Interpreter/CppInterOp.h

@@ -2,7 +2,12 @@
 #define CLANG_CPPINTEROP_H
 
 #include "CppInterOp/CppInterOp.h"
-#warning                                                                       \
+#if defined(_MSC_VER)
+    #pragma message("#include <clang/Interpreter/CppInterOp.h> is deprecated; use #include <CppInterOp/CppInterOp.h")
+#else
+    #warning                                                                       \
     "#include <clang/Interpreter/CppInterOp.h> is deprecated; use #include <CppInterOp/CppInterOp.h"
+#endif
+
 
 #endif // CLANG_CPPINTEROP_H