include/:
	* libiberty.h (asprintf): Don't declare if HAVE_DECL_ASPRINTF is
	not defined.
libiberty/:
	* configure.ac: Add AC_GNU_SOURCE.
	* Makefile.in (COMPILE.c): Add -D_GNU_SOURCE.
	* configure, config.in: Rebuild.
	* floatformat.c (_GNU_SOURCE): Don't define if already defined.

From-SVN: r223589