Compilation error when HAVE_SETAFFINITY is disabled

When I disable affinity by commenting out #define HAVE_SETAFFINITY 1 in config.h I get the following compiler errors:

engine.c(3298): error: identifier "nr_affinity_cores" is undefined
      for (int i = 0; i < nr_affinity_cores; i++) printf("%i ", cpuid[i]);
                          ^

engine.c(3298): error: identifier "cpuid" is undefined
      for (int i = 0; i < nr_affinity_cores; i++) printf("%i ", cpuid[i]);