[Bug c/65158] printf attribute error reporting assumes single-byte characters

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65158

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2018-09-14
                 CC|                            |msebor at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
There is no format specifier in C or POSIX that involves a multibyte character.
 They're all single byte characters in the 7-bit ASCII range that should
convert to single byte characters in most (all?) encodings.  It would take an
unusual character set to map a 7-bit character to a multibyte sequence.  Is it
worth worrying about this corner case?

(-Wformat doesn't currently handle the -fexec-charset= option so that should
presumably be a higher priority problem to fix.)