RFA: Allowing __sync_* functions to be added to libgcc

[Ian Lance Taylor]

Richard Sandiford <rdsandiford@googlemail.com> writes:

> gcc/
> 	* Makefile.in (libgcc.mvars): Add LIBGCC_SYNC and LIBGCC_SYNC_CFLAGS.
> 	* libgcc-std.ver (GCC_4.4.0): New version, inherited from GCC_4.3.0.
> 	Add synchronization functions.
> 	* config/sync.c: New file.
> 	* config/mips/t-libgcc-mips16 (LIBGCC_SYNC): Define.
> 	(LIBGCC_SYNC_CFLAGS): Likewise.
>
> libgcc/
> 	* Makefile.in: Add support for __sync_* libgcc functions.

This is OK.

Thanks.

Ian