Hello,

This patch enables by default for native Windows targets the
-mms-bitfields option, like the netware target does.

ChangeLog gcc/

	* config/i386/mingw32.h (TARGET_SUBTARGET_DEFAULT): Add
	MASK_MS_BITFIELD_LAYOUT bit.

ChangeLog gcc/testsuite

	* g++.dg/ext/bitfield2.C: Add for i?86/x86_64-*-mingw*
	targets the additional -mno-ms-bitfields and
	-Wno-packed-bitfield-compat options.
	* g++.dg/ext/bitfield3.C: Likewise.
	* g++.dg/ext/bitfield4.C: Likewise.
	* g++.dg/ext/bitfield5.C: Likewise.
	* gcc.dg/bitfld-15.c: Likewise.
	* gcc.dg/bitfld-16.c: Likewise.
	* gcc.dg/bitfld-17.c: Likewise.
	* gcc.dg/bitfld-18.c: Likewise.

Tested for i686-w64-mingw32, x86_64-w64-mingw32, and
x86_&4-pc-linux-gnu. Ok for apply?

Regards,
Kai