[PATCH] fix some -Werror fallout in the absence of FP round/exception support

[Joseph Myers]

On Fri, 26 Dec 2014, Chris Metcalf wrote:

> Due to tile missing a bunch of FP exception and rounding
> support, the tests generate warnings.  These changes fix the
> warnings by just not compiling some unused functions, and
> adding some attribute((unused)) tags.
> 
> This seems pretty straightforward but I wanted to get some
> signoff before committing.

OK with the missing space added between "__attribute__" and "((unused))" 
(throughout the patch).

-- 
Joseph S. Myers
joseph@codesourcery.com