no warning with old-fashioned function headers

[Edmund GRIMLEY EVANS]

Is there a good reason for this x() not giving a warning, even with
-Wall? There is a warning with y().

I expect there's a note somewhere in the code that explains both this
and why the gcc code itself uses the old sort of function headers, but
I haven't found it ...


int x(a, b)
     int a;
     int b;
{
  return x(a);
}

int y(int a, int b)
{
  return y(a);
}