From 13362237d4ea5984bbe5a303940d41a4996c20b7 Mon Sep 17 00:00:00 2001
From: oetiker <oetiker@a5681a0c-68f1-0310-ab6d-d61299d08faa>
Date: Mon, 10 Aug 2009 11:47:18 +0000
Subject: [PATCH] include math.h when testing IEEE

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk@1887 a5681a0c-68f1-0310-ab6d-d61299d08faa
---
 program/m4/acinclude.m4 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/program/m4/acinclude.m4 b/program/m4/acinclude.m4
index f1b61192..c1e5c4bd 100644
--- a/program/m4/acinclude.m4
+++ b/program/m4/acinclude.m4
@@ -390,6 +390,10 @@ AC_CACHE_VAL([rd_cv_ieee_$2],
 #  define isinf(a) (fpclassify(a) == FP_INFINITE)
 #endif
 
+#if HAVE_MATH_H
+#include <math.h>
+#endif
+
 #include <stdio.h>
 int main(void){
     double rrdnan,rrdinf,rrdc,rrdzero;
-- 
2.30.2