POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/hypotl.html}
-Gnulib module: ---
+Gnulib module: hypotl or hypotl-ieee
-Portability problems fixed by Gnulib:
+Portability problems fixed by either Gnulib module @code{hypotl} or @code{hypotl-ieee}:
@itemize
+@item
+This function is missing on some platforms:
+FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 9, Cygwin, MSVC 9, Interix 3.5, BeOS.
+@item
+This function produces very imprecise results on some platforms:
+OpenBSD 5.1/SPARC.
@end itemize
-Portability problems not fixed by Gnulib:
+Portability problems fixed by Gnulib module @code{hypotl-ieee}:
@itemize
@item
-This function is missing on some platforms:
-FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 9, Cygwin, Interix 3.5, BeOS.
+When the arguments are mixed NaN and Infinity, this function returns a wrong
+value on some platforms:
+OSF/1 5.1, mingw, MSVC 9.
+@end itemize
+
+Portability problems not fixed by Gnulib:
+@itemize
@end itemize