/* Test of <stdbool.h> substitute.
- Copyright (C) 2002-2007, 2009-2016 Free Software Foundation, Inc.
+ Copyright (C) 2002-2007, 2009-2021 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
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/>. */
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
-/* We want this test to succeed even when using gcc's -Werror; but to
- do that requires a pragma that didn't exist before 4.3.0. */
-#ifndef __GNUC__
+/* Define ADDRESS_CHECK_OKAY if it is OK to assign an address to a 'bool'
+ and this does not generate a warning (because we want this test to succeed
+ even when using gcc's -Werror). */
+#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) \
+ || (__clang_major__ >= 4)
+/* We can silence the warning. */
+# pragma GCC diagnostic ignored "-Waddress"
# define ADDRESS_CHECK_OKAY
-#elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)
-/* No way to silence -Waddress. */
+#elif defined __GNUC__ || defined __clang__
+/* There may be a warning. */
#else
-# pragma GCC diagnostic ignored "-Waddress"
+/* Ignore warnings from other compilers. */
# define ADDRESS_CHECK_OKAY
#endif
/* Several tests cannot be guaranteed with gnulib's <stdbool.h>, at
least, not for all compilers and compiler options. */
-#if HAVE_STDBOOL_H || 3 <= __GNUC__
+#if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__
struct s { _Bool s: 1; _Bool t; } s;
#endif
char a[true == 1 ? 1 : -1];
char b[false == 0 ? 1 : -1];
char c[__bool_true_false_are_defined == 1 ? 1 : -1];
-#if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above. */
+#if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__ /* See above. */
char d[(bool) 0.5 == true ? 1 : -1];
# ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning. */
/* C99 may plausibly be interpreted as not requiring support for a cast from
a variable's address to bool in a static initializer. So treat it like a
GCC extension. */
-# ifdef __GNUC__
+# if defined __GNUC__ || defined __clang__
bool e = &s;
# endif
# endif
#endif
char g[true];
char h[sizeof (_Bool)];
-#if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above. */
+#if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__ /* See above. */
char i[sizeof s.t];
#endif
enum { j = false, k = true, l = false * true, m = true * 256 };
char o[sizeof n == m * sizeof n[0] ? 1 : -1];
char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
/* Catch a bug in an HP-UX C compiler. See
- http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
- http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html
+ https://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
+ https://lists.gnu.org/r/bug-coreutils/2005-11/msg00161.html
*/
_Bool q = true;
_Bool *pq = &q;
{
int error = 0;
-#if HAVE_STDBOOL_H || 3 <= __GNUC__ /* See above. */
+#if HAVE_STDBOOL_H || 3 <= __GNUC_ || 4 <= __clang_major___ /* See above. */
# ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning. */
/* A cast from a variable's address to bool is valid in expressions. */
{
/* Catch a bug in IBM AIX xlc compiler version 6.0.0.0
reported by James Lemley on 2005-10-05; see
- http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086.html
+ https://lists.gnu.org/r/bug-coreutils/2005-10/msg00086.html
This is a runtime test, since a corresponding compile-time
test would rely on initializer extensions. */
{