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[patch i386 windows]: Fix weak-symbol support for 64-bit windows target

Hello,

This patch fixes the handling of weak symbols for 64-bit windows
pe-coff target and providing same feature as for 32-bit pe-coff
windows targets. As this target has set
the pic-flag, but pe-coff doesn't support GOT table, some trickery was
necessary to avoid the emitting
of GOT table dereferencing for this target.

ChangeLog

2010-11-04  Kai Tietz

	* config/i386/i386.c (legitimize_pic_address): Special case
	for 64-bit windows target.
	(output_pic_addr_const): Don't output @GOTPCREL for
	64-bit windows target.
	(x86_output_mi_thunk): Use direct jump for target
	64-bit windows.
	* config/i386/winnt.c (i386_pe_binds_local_p): Enable 64-bit
	weak.

Tested for x86_64-pc-mingw32, and x86_64-pc-linux-gnu. Ok for apply?

Regards,
Kai


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Attachment: x64_weak.diff
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