--- /dev/null
+@node strcspn
+@section @code{strcspn}
+@findex strcspn
+
+POSIX specification: @url{http://www.opengroup.org/susv3xsh/strcspn.html}
+
+Gnulib module: strcspn
+
+Portability problems fixed by Gnulib:
+@itemize
+@item
+This function is missing on some old platforms.
+@end itemize
+
+Portability problems not fixed by Gnulib:
+@itemize
+@item
+This function cannot work correctly on character strings in multibyte locales.
+Gnulib provides an alternative function @code{mbscspn} that works on character
+strings in all locales.
+@end itemize