gcc/testsuite/gcc.dg/cpp/macro11.c

   1 /* Copyright (C) 2001 Free Software Foundation, Inc.  */
   2
   3 /* { dg-do preprocess } */
   4
   5 /* Source: Neil Booth, 2 Oct 2001.
   6
   7    Tests that we clear the disabled flag that is set by the
   8    macro-defined-to-itself optimization (the optimization might not be
   9    worth it).  */
  10
  11 #define foo foo
  12 #undef foo
  13 #define foo 1
  14 #if !foo
  15 #error foo still disabled!
  16 #endif