[Bug libstdc++/58938] std::exception_ptr is missing on architectures with incomplete atomic int support

[philip.deegan at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58938

--- Comment #17 from Philip Deegan <philip.deegan at gmail dot com> ---
Building bin-utils/gcc/glibc with --with-arch=armv7-a did the trick.

Atomic is not required.

However, if a thread calls std::current_exception it segfaults in
libstdc++-v3/libsupc++/eh_ptr.cc line 190:
__cxa_exception *header = globals->caughtExceptions;

Can only test static pthread linking currently with Wl,--whole-archive
-lpthread -Wl,--no-whole-archive