libstdc++.exp (v3-build_support): Look for __GTHREADS...

libstdc++.exp (v3-build_support): Look for __GTHREADS...

	* testsuite/lib/libstdc++.exp (v3-build_support): Look for
	__GTHREADS, rather than _GLIBCXX_HAVE_GTHR_DEFAULT, to determine
	whether or not thread support is available.

	Backport:
	2005-03-25  Mark Mitchell  <mark@codesourcery.com>
	* testsuite/lib/libstdc++.exp (libstdc++_init): Define LOCALEDIR
	when testing an installed compiler.
	* testsuite/lib/libstdc++.exp (v3-build_support): Pass -w when
	compiling support objects.
	2005-03-23  Mark Mitchell  <mark@codesourcery.com>
	* testsuite/libstdc++-dg/normal.exp: Read testsuite_files, if it
	exists.
	* testsuite/lib/libstdc++.exp (libstdc++_wchar_t): Rename to ...
	(v3-wchar_t): ... this.
	(libstdc++_threads): Rename to ...
	(v3-threads): ... this.
	(libstdc++_test_objs): Rename to ...
	(v3-test_objs): ... this.
	(libstdc++_build_support): Rename to ...
	(v3-build_support): ... this.
	* testsuite/libstdc++-dg/normal.exp: Adjust to use new names.
	* testsuite/lib/libstdc++.exp (libstdc++_init): Improve handling
	of compilers not in the build directory.
	(libstdc++_wchar_t): New variable.
	(libstdc++_threads): Likewise.
	(libstdc++_test_objs): Likewise.
	(v3_target_compile): Use libstdc++_test_objs.
	(v3-list-tests): Remove.
	(listdc++_build_support): New function.
	* testsuite/libstdc++-dg/normal.exp: Rework to dynamically
	generate list of tests.
	2004-11-23  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
	* testsuite/lib/libstdc++.exp: Use new procs in target-libpath.exp.

From-SVN: r99259