[cfe-commits] r167567 - in /cfe/trunk: include/clang/Driver/Driver.h include/clang/Driver/Types.h lib/Driver/Driver.cpp lib/Driver/ToolChains.cpp lib/Driver/Tools.cpp lib/Driver/Tools.h lib/Driver/Types.cpp lib/Driver/WindowsToolChain.cpp

[Hal Finkel]

----- Original Message -----
> From: "Joerg Sonnenberger" <joerg at britannica.bec.de>
> To: cfe-commits at cs.uiuc.edu
> Sent: Tuesday, November 13, 2012 2:10:02 AM
> Subject: Re: [cfe-commits] r167567 - in /cfe/trunk: include/clang/Driver/Driver.h include/clang/Driver/Types.h
> lib/Driver/Driver.cpp lib/Driver/ToolChains.cpp lib/Driver/Tools.cpp lib/Driver/Tools.h lib/Driver/Types.cpp
> lib/Driver/WindowsToolChain.cpp
> 
> On Mon, Nov 12, 2012 at 07:54:15PM -0800, Richard Smith wrote:
> > On Mon, Nov 12, 2012 at 7:14 PM, Rafael Espíndola
> > <rafael.espindola at gmail.com> wrote:
> > >> Consider:
> > >>
> > >> cat << EOF > test.F
> > >>       PROGRAM HELLOW
> > >>       WRITE(UNIT=*, FMT=*) 'Hello World'
> > >>       END
> > >> EOF
> > >>
> > >> clang-cpp test.F
> > >
> > > This used to run
> > > f951 test.F -cpp=/tmp/ccOj9mhO.f90 -E -quiet -v test.F -o - -m64
> > > -mtune=generic -march=x86-64 -fsyntax-only
> > >
> > > Now it tries to run clang as a preprocessor and fails because of
> > > the
> > > "-x f95-cpp-input". Is the fortran preprocessor the same as the c
> > > one?
> > 
> > It's similar, but not quite the same. There is a patch to support
> > Fortran preprocessing in Clang:
> > 
> > http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20120430/057199.html
> > 
> > (There's also Fortran 95's coco preprocessor, which is not the same
> > at
> > all, but I assume that's not what's wanted here.)
> 
> While I think proper support for the Fortran preprocessing rules
> would
> be nice, I wonder if reverting this change for clang 3.2 is not the
> better option?

If you just need preprocessing, then adding some file types so make the compiler treat the source like C should work perfectly (that is, after all, what most of the original Fortran preprocessors did as far as I know). For anything more involved, we might want to revert this and do some more planning.

 -Hal

> 
> Joerg
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> 

-- 
Hal Finkel
Postdoctoral Appointee
Leadership Computing Facility
Argonne National Laboratory