Work around HP-UX and AIX C compiler bugs with built-in _Bool.

diff --git a/lib/ChangeLog b/lib/ChangeLog
index 163a204835191fbe6a54aacf9b94460da648b542..c3f544ab1413b9d0309d94130d2deca6d5c581a8 100644 (file)
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,9 @@
+2006-01-24  Bruno Haible  <bruno@clisp.org>
+
+       * stdbool_.h (_Bool) [HP-UX cc, AIX cc,xlc] : Define as 'signed char'
+       to avoid problems with the built-in _Bool type.
+       Reported by Paul Eggert on 2005-11-26.
+
 2006-01-24  Jim Meyering  <jim@meyering.net>
 
        * socket_.h: Remove useless parentheses in uses of cpp `defined'.

diff --git a/lib/stdbool_.h b/lib/stdbool_.h
index 3177ae03cf48588f39d4cfae235889d3a010f376..586b5c71733290d36297c857a7d16ee33ae291ea 100644 (file)
--- a/lib/stdbool_.h
+++ b/lib/stdbool_.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2001, 2002, 2003, 2006 Free Software Foundation, Inc.
    Written by Bruno Haible <haible@clisp.cons.org>, 2001.
 
    This program is free software; you can redistribute it and/or modify
@@ -71,7 +71,18 @@
    (see ISO C 99 6.3.1.1.(2)).  So we add a negative value to the
    enum; this ensures that '_Bool' promotes to 'int'.  */
 #if !(defined __cplusplus || defined __BEOS__)
-# if !@HAVE__BOOL@
+# if @HAVE__BOOL@
+#  if defined __HP_cc || defined __xlc__
+    /* Some HP-UX cc and AIX IBM C compiler versions have compiler bugs when
+       the built-in _Bool type is used.  See
+         http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
+         http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html
+         http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086.html
+       Override it.  */
+#   define _Bool signed char
+enum { false = 0, true = 1 };
+#  endif
+# else
 #  if defined __SUNPRO_C && (__SUNPRO_C < 0x550 || __STDC__ == 1)
     /* Avoid stupid "warning: _Bool is a keyword in ISO C99".  */
 #   define _Bool signed char