------- Comment #5 from kargl at gcc dot gnu dot org 2010-02-16 16:01 ------- (In reply to comment #4) > Subject: Re: gfortran: spurious warning of line truncation > at col 72 > > On Tue, 16 Feb 2010, patrick dot wallace at stfc dot ac dot uk wrote: > > > Mystery solved. It is to do with line endings. When gfortran sees > > a file with DOS line endings it interprets the CR and LF as separate > > characters. This is why demonstrating the effect is so slippery. > > > > I guess gfortran is within its rights to work this way, and only > > accept Unix line endings. But I would argue that this is unhelpful, > > and that it would be better to make gfortran detect the condition > > and deal with it sympathetically. > > I think all the front ends should behave like the C-family ones in this > regard, and accept all of CR, LF and CRLF as meaning end-of-line > regardless of the host OS. >
Well, it's a counting issue. Fixed-form Fortran is required to have exactly 72 characters in a line of code. Does CRLF count as one character or two? gfortran currently counts CRLF as two characters, which is the source of the problem and the reason why I could not reproduce the problem. It might be possible to ignore CR in the gfortran parser. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43078
