atomic X requires runtime support ...

[mdav2]

I am trying to cross compile for macOS target, and I receive the following error:

/opt/x86_64-apple-darwin14/x86_64-apple-darwin14/sys-root/usr/include/c++/v1/atomic:926:17: error: 
      atomic load requires runtime support that is not available for this
      target
        {return __c11_atomic_load(&__a_, __m);}
                ^
src/internal/1m/reduce.cxx:47:31: note: in instantiation of member function
      'std::__1::__atomic_base<tblis::atomic_reducer_helper<std::__1::complex<double>
      >, false>::load' requested here
        result = local_result.load().first;
                              ^
2 errors generated.

However, when I compile natively on macOS El Capitan, everything works fine.

Does anyone have suggestions for resolving this issue? Cross posted to BinaryBuilder issues, which is the cross compilation environment.

[devinamatthews]

I had no idea it was possible to cross-compile for macOS... the atomic functions come from libatomic on linux and libSystem on macOS (or are builtins perhaps?), so maybe that is the issue.

[mdav2]

Okay, that makes sense. I'll do some more digging.