systemd-analyze plot > test.svg produces output with all y and height
element attributes equal to zero. This of course causes the resulting
svg to appear blank (zero height). Bug does not affect x86. Looks like
a compiler optimization may be the culprit.
https://github.com/archlinuxarm/PKGBUILDs/issues/815
#include "pager.h"
#define SCALE_X (0.1 / 1000.0) /* pixels per us */
-#define SCALE_Y 20.0
+#define SCALE_Y (20.0)
#define compare(a, b) (((a) > (b))? 1 : (((b) > (a))? -1 : 0))