config patch to turn off -Wformat for systems that include it in -Wall

[Joseph S. Myers]

On Thu, 25 Mar 2010, Mike Stump wrote:

> This patch tuns off -Wformat for systems that include it in -Wall.  
> Apple's gcc would be one such system.  On other systems, this shouldn't 
> have any effect.  I originally wanted to put this into config/mh-darwin, 
> but those flags come before -Wall on the command line and hence can't 
> effect it.

Standard FSF GCC includes -Wformat in -Wall and we have -Wformat 
functionality *specifically and solely present for use in building GCC*, 
so this patch is quite definitely wrong and will inevitably lead to many 
bugs being introduced into GCC.  Perhaps you could explain the actual 
problem you are trying to fix.

-- 
Joseph S. Myers
joseph@codesourcery.com