math.h:nexttoward missing in cygwin

[David Manura]

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

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple