2015-05-08  Gregor Richards  <gregor.richards@uwaterloo.ca>
	    Szabolcs Nagy  <szabolcs.nagy@arm.com>

	* config.gcc (LIBC_MUSL): New tm_defines macro.
	* config/linux.h (OPTION_MUSL): Define.
	(MUSL_DYNAMIC_LINKER, MUSL_DYNAMIC_LINKER32,)
	(MUSL_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKERX32,)
	(INCLUDE_DEFAULTS_MUSL_GPP, INCLUDE_DEFAULTS_MUSL_LOCAL,)
	(INCLUDE_DEFAULTS_MUSL_PREFIX, INCLUDE_DEFAULTS_MUSL_CROSS,)
	(INCLUDE_DEFAULTS_MUSL_TOOL, INCLUDE_DEFAULTS_MUSL_NATIVE): Define.
	* config/linux.opt (mmusl): New option.
	* doc/invoke.texi (GNU/Linux Options): Document -mmusl.
	* configure.ac (gcc_cv_libc_provides_ssp): Add *-*-musl*.
	(gcc_cv_target_dl_iterate_phdr): Add *-linux-musl*.
	* configure: Regenerate.

Co-Authored-By: Szabolcs Nagy <szabolcs.nagy@arm.com>

From-SVN: r222904