https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64735
--- Comment #9 from Pauli <suokkos at gmail dot com> --- atomicity.h uses exactly same builtins if _GLIBCXX_ATOMIC_BUILTINS is set 1. Difference include check for __gthread_active_p check and annotations for race detector. Annotations are empty macros in default build. Same code is uses for all other atomic operations in libstdc++. I'm finally having an working armv5te build from gcc-6-branch. I'm currently waiting the second unit test run to complete. If there is no unexpected failures from futures or exceptions I fill submit the complete patch later today.
