> On 6 May 2019, at 09:02, Jakub Jelinek <ja...@redhat.com> wrote: > > On Mon, May 06, 2019 at 02:41:41PM +0200, FX wrote: >> Hi gcc and gfortran developers, >> >> While testing GCC 9.1.0 before shipping it as part of Homebrew for macOS, >> we’re seeing the following OpenMP-based failure when recompiling several >> software packages with GCC 9. It includes both C++ and Fortran codes, which >> were working fine with the exact same setup and GCC 8.3.0. >> >> The missing symbols we’re seeing are always in this list: >> _GOMP_loop_nonmonotonic_dynamic_next >> _GOMP_loop_nonmonotonic_dynamic_start >> _GOMP_loop_ull_nonmonotonic_guided_next >> _GOMP_loop_ull_nonmonotonic_guided_start > > Those are certainly exported from my GCC 9 libgomp.so.1.0.0 (at least on > Linux but I don't see how it could not be elsewhere).
I can’t, at present, see how it would be different Darwin. > So, the most likely explanation would be you are compiling something with > GCC 9, but linking against GCC 8 or earlier version of libgomp. Could you file a PR with a reproducer - presumably even a trivial OpenMP program will fail? thanks Iain
