[Bug other/42966] add some indication that a warning has been converted to an error

[manu at gcc dot gnu dot org]

------- Comment #1 from manu at gcc dot gnu dot org  2010-02-05 01:20 -------
@Simon,

I think this solution would be accepted more readily by everybody, since anyway
we already have the [-W*] markers for most warnings except default ones. What
do you think?

I specially like showing the flag for disabling but that would be perhaps more
transgressive.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42966