Merge "math operations are only present in the cc not in the header."

compiler2/Real.cc

@@ -25,6 +25,7 @@
 #include <stdlib.h>
 #include <errno.h>
 #include <string.h>
+#include <cmath>
 
 namespace Common {
 

compiler2/Real.hh

@@ -18,7 +18,6 @@
 #define _Common_Real_HH
 
 #include "string.hh"
-#include <math.h>
 
 // older versions of gcc do not have numeric_limits<double> or it is wrong
 // and they do not have constants defined by C99 standard