Ulrich Drepper  <drepper@redhat.com>

	PR libstdc++/23591
	* scripts/create_testsuite_files: Support for "C" test files.
	* testsuite/lib/libstdc++.exp: Same.
	* testsuite/libstdc++-dg/normal.exp: Same.
	* testsuite/ext/mt_allocator/22309_thread.cc: Update names.
	* testsuite/19_diagnostics/23591_thread-1.c: New.
	* testsuite/testsuite_shared.cc: Add tests, rename existing functions.
	* libsupc++/eh_globals.cc: Make global thread local if possible.
	* configure.ac: Use GCC_CHECK_TLS.
	* acinclude.m4: Include tls.m4.
	* configure: Regenerate.
	* config.h.in: Same.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@107350 138bc75d-0d04-0410-961f-82ee72b054a4