--- /dev/null
+@node clog
+@section @code{clog}
+@findex clog
+
+POSIX specification: @url{http://www.opengroup.org/susv3xsh/clog.html}
+
+Gnulib module: ---
+
+Portability problems fixed by Gnulib:
+@itemize
+@end itemize
+
+Portability problems not fixed by Gnulib:
+@itemize
+@item
+This function is missing on some platforms:
+FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 9, Cygwin, mingw, Interix 3.5.
+@end itemize