nextafter
=========

POSIX specification:
 http://www.opengroup.org/onlinepubs/9699919799/functions/nextafter.html

Gnulib module: nextafter

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This function is missing on some platforms: Minix 3.1.8, MSVC 9.

  * This function is not declared on some platforms: IRIX 5.3.