gcc/
	* Makefile.in (libgcc.mvars): Add TARGET_SYSTEM_ROOT.
	* config/rs6000/aix.h (LINK_SYSCALLS_SPEC): Add %R to the
	!CROSS_DIRECTORY_STRUCTURE alternative and use it for
	CROSS_DIRECTORY_STRUCTURE too.
	(LINK_LIBG_SPEC): Likewise.
	(LIB_SPEC): Add %R to sysroot paths.
	* config/rs6000/aix43.h (CPP_SPEC): Add %R to sysroot paths.
	(CPLUSPLUS_CPP_SPEC, LIB_SPEC): Likewise.
	* config/rs6000/aix51.h: As for aix43.h.
	* config/rs6000/aix52.h: Likewise.
	* config/rs6000/aix53.h: Likewise.
	* config/rs6000/aix61.h: Likewise.
	* config/rs6000/t-aix52 (SHLIB_LINK): Add $(TARGET_SYSTEM_ROOT)
	to the beginning of sysroot paths.

From-SVN: r148094