The addition of rint() (by Peter Schneider-Kamp; I forgot to mention
that before) in the previous patch has one problem; rint() is not in
the C math library on all platforms (e.g. not for VC++). Make it
conditional on HAVE_RINT.
diff --git a/Doc/lib/libmath.tex b/Doc/lib/libmath.tex
index f4fd2f2..c20fd7f 100644
--- a/Doc/lib/libmath.tex
+++ b/Doc/lib/libmath.tex
@@ -95,6 +95,7 @@
\begin{funcdesc}{rint}{x, y}
Return the integer nearest to \var{x} as a real.
+(Only available on platforms where this is in the standard C math library.)
\end{funcdesc}
\begin{funcdesc}{sin}{x}