@node unsetenv
@section @code{unsetenv}
@findex unsetenv

POSIX specification: @url{http://www.opengroup.org/susv3xsh/unsetenv.html}

Gnulib module: setenv

Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 9, mingw, BeOS.
@item
This function has the return type @samp{void} instead of @samp{int} on some
platforms:
MacOS X 10.3, FreeBSD 6.0, NetBSD 1.6, OpenBSD 3.8, OSF/1 5.1.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@end itemize