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

[redi at gcc dot gnu.org]

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

--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Philip Deegan from comment #13)
> How would one fix this on ARMv7-A for instance? 
> 
> Compiling with "-march=armv7-a" on arm-linux-gnueabihf results in a link
> error for exception_ptr/current_exception/rethrow_exception etc.
> 
> gcc_5.3_ARM32HF/bin/gcc  -dM - -E -march=armv7-a < /dev/null | grep 
> ATOMIC_INT_LOCK_FREE
> #define __GCC_ATOMIC_INT_LOCK_FREE 2

Did you try linking with -latomic ?