- fortran: -DLIBOMP_FORTRAN_MODULES=True (needs virtual/fortran?) - hwloc: -DLIBOMP_USE_HWLOC=True (needs sys-apps/hwloc) - ompt: -DLIBOMP_OMPT_SUPPORT=ON (possibly: -DLIBOMP_OMPT_BLAME=True -DLIBOMP_OMPT_TRACE=True) Reported by Paweł Ośmiałowski via mail.
So: Fortran means serious trouble. It installs quasi-binary .mod files to /usr/include which differ between ABIs and I have no clue how to wrap them properly.