https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109467
--- Comment #2 from sandra at gcc dot gnu.org --- I guess the best thing to do is follow the respective standards, e.g. %<KEYWORD%> for Fortran keywords %<keyword%> for OpenMP keywords I guess Gnu extension keywords could be either upper or lower case, provided both are recognized. There are likely a lot of test cases that match on error messages that would have to be adjusted.
