sandbox/Antoonvh/testO.c

    We test if optimzation is actually turned on by the Makefile by checking for output:

    It is here. the sandbox server is just slower than I expected 
    #include "utils.h"
scalar s[];
int main() {
  system ("rm s.png s2.png");
#ifdef __OPTIMIZE__
  init_grid (256);
  foreach()
    s[] = x + sq(y);
  output_ppm (s, file = "s.png");
#else
  init_grid (128);
  foreach()
    s[] = sq(x) + y;
  output_ppm (s, file = "s2.png");
#endif
}

    The non __OPTIMIZE__d output does not exist:

    see?