Fix compilation on MinGW

include/v8.h

 // Copyright 2007-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 23 matching lines @@
  *
  * For other documentation see http://code.google.com/apis/v8/
  */
 
 #ifndef V8_H_
 #define V8_H_
 
 #include <stdio.h>
 
 #ifdef _WIN32
+// When compiling on MinGW stdint.h is available.
+#ifdef __MINGW32__
+#include <stdint.h>
+#else  // __MINGW32__
 typedef signed char int8_t;
 typedef unsigned char uint8_t;
 typedef short int16_t;  // NOLINT
 typedef unsigned short uint16_t;  // NOLINT
 typedef int int32_t;
 typedef unsigned int uint32_t;
 typedef __int64 int64_t;
 typedef unsigned __int64 uint64_t;
-// intptr_t is defined in crtdefs.h through stdio.h.
+// intptr_t and friends are defined in crtdefs.h through stdio.h.
+#endif  // __MINGW32__
 
 // Setup for Windows DLL export/import. When building the V8 DLL the
 // BUILDING_V8_SHARED needs to be defined. When building a program which uses
 // the V8 DLL USING_V8_SHARED needs to be defined. When either building the V8
 // static library or building a program which uses the V8 static library neither
 // BUILDING_V8_SHARED nor USING_V8_SHARED should be defined.
 // The reason for having both V8EXPORT and V8EXPORT_INLINE is that classes which
 // have their code inside this header file need to have __declspec(dllexport)
 // when building the DLL but cannot have __declspec(dllimport) when building
 // a program which uses the DLL.
@@ skipping 2529 matching lines @@
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef V8EXPORT_INLINE
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_