tzname
======

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

Gnulib module: ---

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This variable is missing on some platforms: IRIX 6.5, OSF/1 5.1, mingw.

  * The address of this variable is not a compile-time constant on some platforms: Cygwin, mingw.