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libstdc++-v3/ * configure.ac (--enable-linux-futex): Add new configure option. (HAVE_LINUX_FUTEX): New AC_DEFINE. * Makefile.in: Rebuilt. * aclocal.m4: Rebuilt. * configure: Rebuilt. * config.h.in: Rebuilt. * config/cpu/generic/cxxabi_tweaks.h (_GLIBCXX_GUARD_BIT, _GLIBCXX_GUARD_PENDING_BIT, _GLIBCXX_GUARD_WAITING_BIT): Define. * config/cpu/arm/cxxabi_tweaks.h (_GLIBCXX_GUARD_BIT, _GLIBCXX_GUARD_PENDING_BIT, _GLIBCXX_GUARD_WAITING_BIT): Define. * libsupc++/guard.cc: Include climits and syscall.h. (_GLIBCXX_USE_FUTEX): Define if futex syscall and atomic builtins are supported. (_GLIBCXX_FUTEX_WAIT, _GLIBCXX_FUTEX_WAKE): Likewise. (__guard_test_bit): New static inline. (__cxa_guard_acquire, __cxa_guard_release, __cxa_guard_abort): Use atomic builtins and futex syscall if _GLIBCXX_USE_FUTEX. config/ * futex.m4: New file. libgomp/ * configure.ac: Move futex checking into ../config/futex.m4. * configure: Rebuilt. * aclocal.m4: Rebuilt. * Makefile.in: Rebuilt. * configure.tgt: Rename have_tls to gcc_cv_have_tls to match 2007-10-15 ../config/tls.m4 change. From-SVN: r131399
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