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 The linker lines that generate these issues vary, but they are of the form: g++-9 -fopenmp -std=c++14 -DNDEBUG *.o -o foo or: gfortran -fopenmp -ffast-math -funroll-loops -ftree-vectorize -ffree-form -O2 *.o -o foo which I think is valid, since passing -fopenmp to the driver should link the necessary libraries, in which it would find the symbols that the front-ends emitted. I have read the release notes and can’t find anything related. Any advice? Thanks, FX
