20001121-1.c

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

double d;

__inline__ double foo (void)
{
  return d;
}

__inline__ int bar (void)
{
  foo();
  return 0;
}

int main (void)
{
  if (bar ())
    abort ();
  exit (0);
}