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Date:	Sat, 25 Jul 2009 19:07:37 -0400
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Subject:	math.h:nexttoward missing in cygwin
From:	David Manura <dm DOT list AT math2 DOT org>
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The math.h nexttoward function [1] in math.h is not available in
Cygwin gcc (but does exist under the ming compiler in Cygwin).  It's
not clear to me though when nexttoward is preferred over nextafter.
Boost calls nexttoward a legacy function [2].

[1] http://www.opengroup.org/onlinepubs/009695399/functions/nextafter.html
[2] http://www.boost.org/doc/libs/1_39_0/libs/math/doc/sf_and_dist/html/math_toolkit/special/next_float/nextafter.html

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