strerror
========

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

Gnulib module: strerror

Portability problems fixed by Gnulib:

  * This function is missing on some old platforms.

  * This function fails to return a string for out-of-range integers on some platforms: Solaris 8

Portability problems not fixed by Gnulib: