[PATCH] Use -frounding-math for math testsuite

[Joseph S. Myers]

On Wed, 2 May 2012, Andreas Jaeger wrote:

> Still, we should tell GCC that we manipulate the rounding mode and
> therefore add -frounding-math to these files that call fesetround. This
> works around the bug as well and will avoid problems in the future if
> GCC optimizes further.
> 
> Tested on Linux/x86-64.
> 
> Ok to commit? 

Please commit this.  Strictly we should compile all the libraries with 
-frounding-math as well, since library functions may be called in any 
rounding mode (and without -frounding-math, round-to-nearest is assumed); 
the only things for which it's not needed are the miscellaneous 
executables, and those testcases (i.e. all except the ones this patch 
addresses) that don't change the rounding mode.

-- 
Joseph S. Myers
joseph@codesourcery.com