Re: [Qemu-devel] [PATCH] mingw: Do not perform string format checks

[Johannes Schindelin]

Hi,

On Mon, 15 Jun 2009, Jan Kiszka wrote:

> Johannes Schindelin wrote:
> > Hi,
> > 
> > On Sun, 14 Jun 2009, Jan Kiszka wrote:
> > 
> >> Blue Swirl wrote:
> >>> On 6/14/09, Jan Kiszka <address@hidden> wrote:
> >>>> [ I can't check the situation with cygwin, so this is mingw-only. ]
> >>>>
> >>>>  gcc still does not support the Windows-specific format string modifier
> >>>>  "I64". Therefore, it makes no sense to check for format string
> >>>>  correctness and generate tons of false positives.
> >>> I don't have this problem, currently mingw builds with zero warnings
> >>> for me. But I didn't enable automatic -Werror flag for mingw just
> >>> because I guessed this would happen. What's the gcc version you're
> >>> using?
> >> i686-pc-mingw32-gcc (GCC) 4.3.3
> > 
> > 4.3.3 is known to show this bad behavior.  AFAICT it is fixed in 4.4.0.  
> > (At least it fixed things for msysGit.)
> > 
> > FWIW by "bad behavior" I mean that a compiler warning is emitted when 
> > using %I64, but not when using %ll.  But when executing the program, it 
> > actually _requires_ a %I64, _not_ a %ll.
> > 
> > In light of this, I _strongly_ recommend updating to 4.4.0.
> 
> I will, once I come across a pre-built one that fits.

The de-facto standard is http://www.tdragon.net/recentgcc/

Hth,
Dscho