[PATCH v2] Let fpclassify use the builtin when optimizing for size in C++ mode (bug 22146)

[Joseph Myers]

On Wed, 20 Sep 2017, Gabriel F. T. Gomes wrote:

> 	[BZ #22146]
> 	math/math.h: Let fpclassify use the builtin in C++ mode, even
> 	when optimazing for size.

OK.

-- 
Joseph S. Myers
joseph@codesourcery.com