From 655f4dfedbb2b3ca8600777eb1011bb1df0ecf79 Mon Sep 17 00:00:00 2001
From: Johannes Schickel
Date: Fri, 12 Feb 2016 18:18:46 +0100
Subject: WIN32: Fix compilation with MinGW-w64 based Win32 compiler.

---
 backends/platform/sdl/win32/win32-main.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'backends/platform/sdl/win32/win32-main.cpp')

diff --git a/backends/platform/sdl/win32/win32-main.cpp b/backends/platform/sdl/win32/win32-main.cpp
index c6339f0c8c..4864347d81 100644
--- a/backends/platform/sdl/win32/win32-main.cpp
+++ b/backends/platform/sdl/win32/win32-main.cpp
@@ -44,7 +44,12 @@ int __stdcall WinMain(HINSTANCE /*hInst*/, HINSTANCE /*hPrevInst*/,  LPSTR /*lpC
 	SDL_SetModuleHandle(GetModuleHandle(NULL));
 #endif
 // HACK: __argc, __argv are broken and return zero when using mingwrt 4.0+ on MinGW
-#if defined(__GNUC__) && defined(__MINGW32__) && !defined(__MINGW64__)
+// HACK: MinGW-w64 based toolchains neither feature _argc nor _argv. The 32 bit
+// incarnation only defines __MINGW32__. This leads to build breakage due to
+// missing declarations. Luckily MinGW-w64 based toolchains define
+// __MINGW64_VERSION_foo macros inside _mingw.h, which is included from all
+// system headers. Thus we abuse that to detect them.
+#if defined(__GNUC__) && defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR)
 	return main(_argc, _argv);
 #else
 	return main(__argc, __argv);
-- 
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