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-rw-r--r--doc/posix-functions/hypot.texi12
1 files changed, 10 insertions, 2 deletions
diff --git a/doc/posix-functions/hypot.texi b/doc/posix-functions/hypot.texi
index 84d4b9d54a..eda9a6be02 100644
--- a/doc/posix-functions/hypot.texi
+++ b/doc/posix-functions/hypot.texi
@@ -4,12 +4,20 @@
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/hypot.html}
-Gnulib module: hypot
+Gnulib module: hypot or hypot-ieee
-Portability problems fixed by Gnulib:
+Portability problems fixed by either Gnulib module @code{hypot} or @code{hypot-ieee}:
@itemize
@end itemize
+Portability problems fixed by Gnulib module @code{hypot-ieee}:
+@itemize
+@item
+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