I think g95 - like most compilers - do not have a flag to accept
STATIC. I assume STATIC was added before the Fortran standard
specified SAVE. A quick glance at the Fortran 77 standard shows that
SAVE exists since at least Fortran 77 (i.e. around the year 1977).
There is no good reason to use STATIC instead of SAVE. Additionally,
it should be relatively straight forward to change it.
Tobias