diff -ur ppl-0.9/utils/timings.cc ppl-0.9-patched/utils/timings.cc
--- ppl-0.9/utils/timings.cc	2006-01-01 09:27:38.000000000 +0100
+++ ppl-0.9-patched/utils/timings.cc	2008-02-13 19:15:10.000000000 +0100
@@ -29,6 +29,7 @@
 #include <iomanip>
 #include <cstring>
 #include <cerrno>
+#include <cstdlib>
 
 #ifdef HAVE_SYS_TIME_H
 # include <sys/time.h>