cpucycles.c: In function ‘djbsort_cpucycles_persecond’:
cpucycles.c:20:12: error: ‘HW_CPUSPEED’ undeclared (first use in this function)
   20 |   oid[1] = HW_CPUSPEED;
      |            ^~~~~~~~~~~
cpucycles.c:20:12: note: each undeclared identifier is reported only once for each function it appears in
