setkey
======

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

Gnulib module: ---

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This function is missing on some platforms: NetBSD 5.0, Minix 3.1.8, Cygwin, mingw, MSVC 9, BeOS.

  * This function is not declared in <stdlib.h> (without -D_GNU_SOURCE) on some platforms: glibc (at least 2.11--2.13).