PR libfortran/33583

	PR libfortran/33583
	PR libfortran/33698

	* intrinsics/c99_functions.c (tgamma, tgammaf, lgamma, lgammaf):
	New fallback functions.
	* c99_protos.h (tgamma, tgammaf, lgamma, lgammaf): New prototypes.
	* configure.ac: Add checks for tgamma, tgammaf, tgammal, lgamma,
	lgammaf and lgammal.
	* config.h.in: Regenerate.
	* configure: Regenerate.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@130245 138bc75d-0d04-0410-961f-82ee72b054a4