gmtime_r
========

POSIX specification: http://www.opengroup.org/susv3xsh/gmtime_r.html

Gnulib module: ---

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This function is missing on some platforms: mingw.

  * Some platforms define a function of this name that is incompatible to POSIX.