[COMMITTED] Use C99 math macros

[Joseph Myers]

On Wed, 3 Jun 2015, Wilco Dijkstra wrote:

> diff --git a/sysdeps/ieee754/ldbl-opt/nldbl-finite.c b/sysdeps/ieee754/ldbl-opt/nldbl-finite.c

> -  return __finite (x);
> +  return finite (x);

Are you sure about this change?  "finite", as opposed to isfinite, is a 
non-type-generic BSD function; I'd expect this to cause the "finite" 
function name to be used for the call instead of __finite.  (Using 
isfinite here should be fine.)

-- 
Joseph S. Myers
joseph@codesourcery.com