Added initial Linux MinGW-w64 support.

CMake/linux-amd64-mingw32msvc.cmake

@@ -0,0 +1,15 @@
+# Define the cross compilation environment for cross compiling from linux 
+# to Win64 it is to be used when Debian cross compilation toolchain is 
+# available.
+SET(CMAKE_SYSTEM_NAME    Windows) # Target system name
+SET(CMAKE_SYSTEM_VERSION 1)       # Not really used.
+SET(CMAKE_C_COMPILER     "amd64-mingw32msvc-gcc")
+SET(CMAKE_CXX_COMPILER   "amd64-mingw32msvc-g++")
+SET(CMAKE_RANLIB         "amd64-mingw32msvc-ranlib")
+
+
+#Configure the behaviour of the find commands 
+SET(CMAKE_FIND_ROOT_PATH "/usr/amd64-mingw32msvc")
+SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

include/GL/glfw3.h

@@ -67,6 +67,12 @@ extern "C" {
  #endif
 #endif /* APIENTRY */
 
+/* TEMPORARY MinGW-w64 hacks.
+ */
+#if __MINGW64__
+ #define WINAPI
+#include <stddef.h>
+#endif
 
 /* The following three defines are here solely to make some Windows-based
  * <GL/gl.h> files happy. Theoretically we could include <windows.h>, but

src/win32_init.c

@@ -200,7 +200,7 @@ int _glfwPlatformInit(void)
     // as possible in the hope of still being the foreground process)
     SystemParametersInfo(SPI_GETFOREGROUNDLOCKTIMEOUT, 0,
                          &_glfwLibrary.Win32.foregroundLockTimeout, 0);
-    SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, (LPVOID) 0,
+    SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, UIntToPtr(0),
                          SPIF_SENDCHANGE);
 
     if (!initLibraries())
@@ -246,7 +246,7 @@ int _glfwPlatformTerminate(void)
 
     // Restore previous FOREGROUNDLOCKTIMEOUT system setting
     SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0,
-                         (LPVOID) _glfwLibrary.Win32.foregroundLockTimeout,
+                         UIntToPtr(_glfwLibrary.Win32.foregroundLockTimeout),
                          SPIF_SENDCHANGE);
 
     return GL_TRUE;

src/win32_platform.h

@@ -51,7 +51,9 @@
 #endif
 
 // GLFW requires Windows XP
+#ifndef WINVER
 #define WINVER 0x0501
+#endif
 
 #include <windows.h>
 #include <mmsystem.h>