[Bug c/57647] lvalue required as increment operand

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57647

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
While 4.7 issues warning: value computed is not used, 4.8 and 4.9 do not for
int
main ()
{
  char bar = 4;
  char *foo = &bar;
  (unsigned long *)foo++;
  return 0;
}

For 4.7, you can just add cast to void
(void) (unsigned long *)foo++;
to silence the warning.