localtime_r
===========

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

Gnulib module: time_r

Portability problems fixed by Gnulib:

  * This function is missing on some platforms: mingw.

  * Some platforms define a function of this name that is incompatible to POSIX: HP-UX 10.

Portability problems not fixed by Gnulib: