[Bug fortran/47720] problems with makefile dependency generation using -M

[dfranke at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47720

Daniel Franke <dfranke at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |dfranke at gcc dot gnu.org

--- Comment #6 from Daniel Franke <dfranke at gcc dot gnu.org> 2011-07-24 19:35:42 UTC ---
See also #44526 (I think there's another related PR somewhere, can't find it
right now).

The -cpp is required as the C preprocesor and libcpp are being used to generate
the Makefile dependencies. As you probably know, in itself Fortran doesn't
really have a concept of a preprocessor.