[Bug c/38308] New: -Wformat does not work for wide strings

[Bug c/38308] New: -Wformat does not work for wide strings

[bonzini at gnu dot org]

GCC does not warn for this:

int main()
{
  wprintf (L"%s", 5);
}

GCC should try converting the string to single-byte (e.g. to UTF-8, which would
work for any wchar_t encoding in which 0-127 maps to char's encoding) and test
the format string.


-- 
           Summary: -Wformat does not work for wide strings
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bonzini at gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38308

[Bug c/38308] -Wformat does not work for wide strings

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2008-11-28 16:58 -------
A patch was posted a while back:
http://gcc.gnu.org/ml/gcc-patches/2001-12/msg01579.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38308

[Bug c/38308] -Wformat does not work for wide strings

[joseph at codesourcery dot com]

------- Comment #2 from joseph at codesourcery dot com  2008-11-28 17:26 -------
Subject: Re:  -Wformat does not work for wide strings

In view of the removal of c4x support I don't now think any patch for this 
needs to address the format of STRING_CSTs for non-8-bit target bytes.  
But it should still have appropriate accessors for extracting bytes / 
multibyte characters / wide characters from strings (such that support for 
non-8-bit target bytes could be added to those accessors later), though 
without necessarily finding all existing code that should be using those 
accessors.

See also bug 20110 on the format checking not allowing for the execution 
character set once it's extracted a character from the string.  For wide 
characters it's -fwide-exec-charset that's relevant.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38308

[Bug c/38308] -Wformat does not work for wide strings

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2008-11-29 03:12 -------
Confirmed.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-11-29 03:12:35
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38308