#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
-#include <assert.h>
#include <time.h>
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
/* Cygwin currently (as of 2005-04-08, Cygwin 1.5.14) lacks clock_getres,
but still defines _POSIX_TIMERS! Because of that we simply use the