@section @code{siglongjmp}
@findex siglongjmp
-POSIX specification: @url{http://www.opengroup.org/susv3xsh/siglongjmp.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/siglongjmp.html}
Gnulib module: ---
@itemize
@item
This function is missing on some platforms:
-Cygwin, mingw.
+mingw.
+
+@item
+This is only provided as a macro on some platforms:
+Cygwin.
@end itemize