[Bug fortran/53934] Better CPP macro diagnostics

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53934
Bug 53934 depends on bug 44054, which changed state.

Bug 44054 Summary: Handle -Werror, -Werror=, -fdiagnostics-show-option, !GCC$ 
diagnostic (pragmas) and color
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44054

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution|--- |FIXED

[Bug fortran/53934] Better CPP macro diagnostics

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53934

Dominique d'Humieres  changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
   Last reconfirmed||2015-11-07
 Ever confirmed|0   |1

[Bug fortran/53934] Better CPP macro diagnostics

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53934

--- Comment #3 from Manuel López-Ibáñez manu at gcc dot gnu.org ---
*** Bug 49766 has been marked as a duplicate of this bug. ***

[Bug fortran/53934] Better CPP macro diagnostics

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53934
Bug 53934 depends on bug 53552, which changed state.

Bug 53552 Summary: Add support for !GCC$ warning directive (cf. #pragma warning)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53552

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 Resolution|--- |DUPLICATE

[Bug fortran/53934] Better CPP macro diagnostics

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53934

--- Comment #2 from Manuel López-Ibáñez manu at gcc dot gnu.org ---
How is Fortran using CPP? Does it preprocess the whole file externally and then
passes it to the Fortran FE? If so, this is not going to work since the
locations generated by macro expansion are only generated when preprocessing.
If Fortran reads the already preprocessed file, then there are not macros at
all.

Fortran would need to do the preprocessing in-process like the C/C++ FEs to
even start thinking about implementing this. Once that is done and PR44054 is
fixed, then this should be trivial.

[Bug fortran/53934] Better CPP macro diagnostics

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53934

Manuel López-Ibáñez manu at gcc dot gnu.org changed:

   What|Removed |Added

 CC||manu at gcc dot gnu.org

--- Comment #1 from Manuel López-Ibáñez manu at gcc dot gnu.org 2012-10-09 
09:15:10 UTC ---
(In reply to comment #0)
 Expected: Something similar. Possibly related to PR44054 and PR53552

See tree-diagnostic.c: maybe_unwind_expanded_macro_loc.

You could reimplement it in gfortran using fortran diagnostics machinery. But
if you reimplemented the gfortran diagnostics machinery in terms of the general
diagnostics machinery, it will just work (and you will also fix those PRs).
Note that the function does not use anything C/C++ specific, not even
tree-specific.