--- a/configure.ac	Sat Aug 23 12:48:55 2014 +0200
+++ b/configure.ac	Sat Aug 23 23:38:18 2014 +0200
@@ -58,6 +58,7 @@
 else
   CFLAGS="-g -O2 -fomit-frame-pointer -fno-strict-aliasing -Wall -Wshadow -Wwrite-strings -Wstrict-prototypes -Winline"
 fi
+LIBS="$LIBS -lm"
 
 
 AC_CHECK_LIB(xml2,xmlParseFile,result=yes,result=no)