[PATCH][libstc++v3]Add new dg-require-thread-fence directive.
libstdc++-v3/
2015-04-22 Renlin Li <renlin.li@arm.com>
* testsuite/lib/dg-options.exp (dg-require-thread-fence): New.
* testsuite/lib/libstdc++.exp (check_v3_target_thread_fence): New.
* testsuite/29_atomics/atomic_flag/clear/1.cc: Use it.
* testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc: Likewise.
* testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@222324 138bc75d-0d04-0410-961f-82ee72b054a4