text: /* This testcase is part of GDB, the GNU debugger.
  
     Copyright 2013-2020 Free Software Foundation, Inc.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #if 0
  # define HEADER 1
  #endif
  #if 1
  # undef HEADER
  # define HEADER 2
  void header_two_func (void) {}
  #endif
  #if 0
  /* #include "header.h" does not work, why?  */
  # include <header.h>
  #endif
  