--- /dev/null
+Get HZ value from system rather than requiring via CPPFLAGS
+
+Patch by Robin Getz <rgetz@blackfin.uclinux.org>
+
+--- a/dhry.h
++++ b/dhry.h
+@@ -359,6 +359,10 @@
+ /* for "times" */
+ #endif
+
++#ifndef HZ
++#include <sys/param.h>
++#endif
++
+ #define Mic_secs_Per_Second 1000000.0
+ /* Berkeley UNIX C returns process times in seconds/HZ */
+