[Bug c/64955] RFE: have -Wformat suggest the correct format string to use

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64955

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-02-27
                 CC|                            |manu at gcc dot gnu.org
          Component|c++                         |c
     Ever confirmed|0                           |1

--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #0)
> Currently, -Wformat tells me that I got something wrong but doesn't tell we
> what the correct format string is:

I think this should not be hard given the tables already available when
checking formats. This could be an EasyHack.

About generating a patch, we would first need precise locations within format
strings (PR52952), then implement the fix-it hints (PR62314) and editors like
Emacs could parse them to patch the code. Unfortunately, the time I can
dedicate to GCC has been very much reduced lately and I haven't been able to
find anyone to continue this work.