[Bug fortran/26784] Fortran frontend ICEs on -fmudflap

[reichelt at gcc dot gnu dot org]

------- Comment #2 from reichelt at gcc dot gnu dot org  2006-03-26 11:15 -------
> It is not at all clear why you're trying to use libmudflap
> with gfortran.  Have you read the gcc.info of -fmudflap?

I know that you cannot use -fmudflap with gfortran. But that's not
the point. If I specify an invalid option the frontend should produce
a nice error instead of a bogus warning and an ICE.
(Maybe ice-on-invalid-code is a better description than ice-on-valid-code,
although the code might be valid, it's the the command line option that
isn't.)

For 
  gfortran -c -finvalid-option file.f90
I get
  f951: error: unrecognized command line option "-finvalid-option"
which is OK.

But for
  gfortran -c -fmudflap file.f90
I get
  f951: warning: command line option "-fno-builtin" is valid for
C/C++/ObjC/ObjC++ but not for Fortran
  bug.f90:0: internal compiler error: mudflap: this language is not supported
  Please submit a full bug report, [etc.]
which is not OK. An ICE indicates a bug in the compiler per definition.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26784