@itemize
@item
This function is missing on some platforms:
-NetBSD 3.0, OpenBSD 3.8, AIX 4.3.2, HP-UX 11, IRIX 6.5, OSF/1 5.1,
+NetBSD 5.0, OpenBSD 3.8, AIX 4.3.2, HP-UX 11, IRIX 6.5, OSF/1 5.1,
Solaris 10, Cygwin 1.5.x, mingw, Interix 3.5.
@end itemize