* include/bits/stl_threads.h (_Atomic_swap): Kill it...
(_Swap_lock_struct<>): ...and the horse it rode in on.
* src/globals.cc (_Swap_lock_struct<>): Likewise.
* include/ext/stl_rope.h (_Rope_RopeRep<>::_M_c_string_lock): New
member to support...
* include/ext/ropeimpl.h (rope<>::c_str): Follow *all* memory
visibility rules related to POSIX threads.
* testsuite/thread/pthread7-rope.cc: New test.
From-SVN: r66507
