[Bug fortran/53077] suggestion to add the .f extension to the list of file extensions that trigger enabling of the preprocessor

[slayoo at staszic dot waw.pl]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53077

--- Comment #2 from Sylwester Arabas <slayoo at staszic dot waw.pl> 2012-04-22 
21:36:33 UTC ---
Hmm... apparently the PGI compiler uses the same rule for enabling preprocessor
with .f and .F extensions. Then, if there's some important reason behind it (?)
perhaps at least the warning message could be improved by indicating that the
preprocessor is off.