--- a/libgcc/gthr-posix.h	(revision 186092)
+++ b/libgcc/gthr-posix.h	(working copy)
@@ -88,7 +88,7 @@
 # define __GTHREAD_COND_INIT_FUNCTION __gthread_cond_init_function
 #endif
 
-#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+#if SUPPORTS_WEAK && GTHREAD_USE_WEAK && !defined(__MINGW32__)
 # ifndef __gthrw_pragma
 #  define __gthrw_pragma(pragma)
 # endif