Merge pull request #1808 in HDFFV/hdf5 from ~DEROBINS/hdf5_der:gnu-flags-work to develop
* commit '7d291d059da6287f769951c4854c566da0b93ce8':
Parallel Fortran tests now use the MPI module instead of including mpif.h.
First stab at gfortran versions. Tested on gfortran 7-9 so far.
Moved the -std=f2008 option to gfortran 9 for now.
Updated gfortran options. * Removed conclude_fc.am, which was causing verbose builds. Need to investigate more, though. * Added gfortran 9 warnings and flags. This will need to be separated into other version blocks based on when the options first appeared. * The standard is now explicitly set at 2008.
