[Octave-bug-tracker] [bug #54390] liboctave/external incompatibilities with upcoming Fortran 2018

[Mike Miller]

Follow-up Comment #3, bug #54390 (project octave):

Rik - I think we basically require at least Fortran 77 support. Octave used to
build with g77 and I doubt any changes were needed to move from g77 to
gfortran.

This is the first time I've seen gfortran spit out any deprecation messages
about features that are being pruned from the Fortran language. And it's
possible that these will remain warnings forever, maybe gfortran will keep
supporting these structures forever if it's desired to keep building old
code.

The -std option to gfortran doesn't seem as flexible as the g++ option. I
think we want to use -std=gnu, which is the default, but with gfortran 9, that
is now including these new warning messages.

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