minor: prefer stdlib to cmath

1 files changed, 4 insertions, 2 deletions

diff --git a/tools/utils.c b/tools/utils.c
index c544f20..602a144 100644
--- a/tools/utils.c
+++ b/tools/utils.c
@@ -1,8 +1,10 @@
 #include <string>
 #include <sstream>
 #include <iomanip>
-//#include <stdlib.h>     /* for abs() */
-#include <cmath>
+#include <stdlib.h>     /* for abs() */
+/////                   <cmath> would not be an improvement
+/////                   due to lack of interger abs()
+/////                   and ambiguous (and inefficient) promotion
 #include <ctype.h>      /* for isalnum() */
 
 // strip off the directory part of a path, leaving just