X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=m4%2Facinclude.m4;h=c1e5c4bd9d3adea7155dfc3b5e964c06842a103d;hp=f1b611920503072d8556b39d33ea28c9a745a9aa;hb=4b1f8050075d8912369b1cd27fba8815133839cf;hpb=71db1316eb097bcad2005ca95f430b9ecedaa760

diff --git a/m4/acinclude.m4 b/m4/acinclude.m4
index f1b6119..c1e5c4b 100644
--- a/m4/acinclude.m4
+++ b/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;