Re: [gfortran,patch] Ignore byte order mark at start of file

[Tobias Schlüter <tobias dot schlueter at physik dot uni-muenchen dot de>]

Brooks Moses wrote:
> This part assumes that line[1] and line[2] exist.  However, line[] is 
> allocated in load_line as having length maxlen, which is set to 
> gfc_option.free_line_length if we have free-form source with limited 
> line lengths, and there is no guarantee that free_line_length is 3 or 
> higher.
>
> Thus, these should be conditioned on line_len > 2 or 3 as appropriate.

Exactly this point came up in FX and my discussion on IRC :-) 
-ffree-line-length < 3 makes no sense because the END statement may not 
be continued, and every program unit will have one of them.  I wanted to 
craft a patch ensuring that restriction tomorrow.  Please be my guest if 
you want to submit the obvious patch to options.c yourself.

> > Index: gcc/testsuite/gfortran.dg/bom_UTF16-LE.f90
> > ===================================================================
> > --- gcc/testsuite/gfortran.dg/bom_UTF16-LE.f90    (revision 0)
> > +++ gcc/testsuite/gfortran.dg/bom_UTF16-LE.f90    (revision 0)
> > @@ -0,0 +1,7 @@
> > +ÿþp·r·i·n·t· ·*·,· ·"·H·e·l·l·o· ·w·o·r·l·d·"·
> > +·
> > +·e·n·d·
> > +·
> > +·!· ·{· ·d·g·-·d·o· ·c·o·m·p·i·l·e· ·}·
> > +·
> > +·
>
> Does the testsuite harness know what to do with a "dg-do compile" that's 
> in UTF-16 format?

An interesting question, that I didn't think of.

Cheers,
- Tobi