gcc/:
	* config/i386/i386.c (ix86_supports_split_stack): -fsplit-stack
	requires assembler support for CFI directives.
libgcc/:
	* configure.ac: Test whether assembler supports CFI directives.
	* config.host: Only add t-stack and i386/t-stack-i386 to
	tmake_file if libgcc_cv_cfi is "yes".
	* configure: Rebuild.

From-SVN: r164671