constref1.c

gcc-you can use this code to learn something about gcc, and inquire further into linux,

// { dg-do compile }

// Copyright (C) 2002 Free Software Foundation, Inc.
// Contributed by Matt Austern 12 Sep 2002 <[e-mail]>

// Make sure that we can pass a cast-expression as an argument that's
// passed by const reference.

void bar (const long&)
{ }

void foo (int x)
{
  bar ((long) x);
}