#4499 Fix for build of blenderplayer on windows/mingw/scons
fixes some invalid cflags for gcc on windows/mingw/scons
-if sys.platform=='win32':
+if (sys.platform=='win32') & ( Environment().subst('$CC') != 'gcc'):
cflags = ['/GR']
Patch looks ok but no mingw evironment here to test.
So mingw/sconsers to your testing stations.
We can always roll back!