From: Rich Felker <dalias@aerifal.cx>
Date: Sat, 3 Mar 2012 03:35:37 +0000 (-0500)
Subject: fix nan/infinity macros in math.h, etc.
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=405ce58dcf59ecfb3e245fed0b96b1f35fbeaec1;hp=405ce58dcf59ecfb3e245fed0b96b1f35fbeaec1

fix nan/infinity macros in math.h, etc.

the previous version not only failed to work in c++, but also failed
to produce constant expressions, making the macros useless as
initializers for objects of static storage duration.

gcc 3.3 and later have builtins for these, which sadly seem to be the
most "portable" solution. the alternative definitions produce
exceptions (for NAN) and compiler warnings (for INFINITY) on newer
versions of gcc.
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