#include <sys/time.h>
#include <time.h>
#include <stdio.h>

#define HAVE_GETTIMEOFDAY

double
gmx_gettime()
{
#ifdef HAVE_GETTIMEOFDAY
  struct timeval t;
  struct timezone tz = { 0,0 };
  double seconds;
  
  gettimeofday(&t,&tz);
  
  seconds = (double) t.tv_sec + 1e-6*(double)t.tv_usec;
  
  return seconds;
#else
  double  seconds;
  
  seconds = time(NULL);
  
  return seconds;
#endif
}

int main () {
  clock_t prev;
  double t;
  double diff, diff_t;
  int i;

  prev = clock();
  t= gmx_gettime();

  for (i=0;i<1e9;i++);
  
  diff = (double)(clock() - prev)/(double)CLOCKS_PER_SEC;
  diff_t = gmx_gettime()-t;
  printf("%lf %lf\n",diff,diff_t);
  return 0;
}