To support gcc from the GCC Toolset 9 (for -fopenmp and -fopenacc to work), we should update libgomp from DTS 9. This was done for RHEL 7 system gcc as well, see gcc48-libgomp-20160715.patch.
Patch available.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2019:3565