#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!