preprocessor/5416: Need flag for cpp to allow fortran comments

[Neil Booth]

Matt Fago wrote:-

> Using cpp with g77 is abusing cpp? I hope not!

Of course it is, Fortran is not C, or a C-family language.

> I can certainly use sed, but I had hoped it would not be necessary
> in the future. BTW, suggesting that people use c-style comments in
> Fortran code seems silly, and would be difficult in my case even
> with sed.

I didn't suggest using C-style comments.

Neil.