5 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/conj.html}
9 Portability problems fixed by Gnulib:
13 Portability problems not fixed by Gnulib:
16 This function is missing on some platforms:
17 FreeBSD 5.2.1, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, HP-UX 11, IRIX 6.5,
18 OSF/1 4.0, Solaris 9, Cygwin 1.7.7, mingw, Interix 3.5.