So here is the libgcc patch only.
ChangeLog gcc's libgcc
2012-02-28 Kai Tietz <kti...@redhat.com>
* config/i386/sfp-machine.h (_FP_STRUCT_LAYOUT): Define it
for mingw-targets as attribute gcc_struct.
Ok for apply?
Regards,
Kai
Index: config/i386/sfp-machine.h
===================================================================
--- config/i386/sfp-machine.h (revision 184486)
+++ config/i386/sfp-machine.h (working copy)
@@ -1,3 +1,8 @@
+#ifdef __MINGW32__
+ /* Make sure we are using gnu-style bitfield handling. */
+#define _FP_STRUCT_LAYOUT __attribute__ ((gcc_struct))
+#endif
+
#ifdef __x86_64__
#include "config/i386/64/sfp-machine.h"
#else
