asctime_r
=========

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

Gnulib module: extensions

Portability problems fixed by Gnulib:

  * This function has an incompatible declaration on some platforms: Solaris 11 2011-11 (when _POSIX_PTHREAD_SEMANTICS is not defined).

Portability problems not fixed by Gnulib:

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

  * This function may put more than 26 bytes into the argument buffer if an invalid year is passed.