strace/static_assert.h

/*
 * Copyright (c) 2018 Dmitry V. Levin <ldv@altlinux.org>
 * All rights reserved.
 *
 * SPDX-License-Identifier: LGPL-2.1-or-later
 */

#ifndef STRACE_STATIC_ASSERT_H
#define STRACE_STATIC_ASSERT_H

#include "assert.h"

#if defined HAVE_STATIC_ASSERT

/* static_assert is already available */

#elif defined HAVE__STATIC_ASSERT

# undef static_assert
# define static_assert _Static_assert

#else /* !HAVE_STATIC_ASSERT && !HAVE__STATIC_ASSERT */

# define static_assert(expr, message) \
	extern int (*strace_static_assert(int))[sizeof(int[2 * !!(expr) - 1])]

#endif

#endif /* !STRACE_STATIC_ASSERT_H */
Introduce static_assert We are going to use static_assert provided by <assert.h> or, if it doesn't work, our cheap imitation that doesn't display the message specified as the second argument of static_assert. * configure.ac (AC_CACHE_CHECK): Check for static_assert in <assert.h>, define HAVE_STATIC_ASSERT if it is available. * static_assert.h: New file. * Makefile.am (strace_SOURCES): Add it. 2018-04-04 01:52:54 +03:00			`/*`
			`* Copyright (c) 2018 Dmitry V. Levin <ldv@altlinux.org>`
			`* All rights reserved.`
			`*`
Change the license of strace to LGPL-2.1-or-later strace is now provided under the terms of the GNU Lesser General Public License version 2.1 or later, see COPYING for more details. strace test suite is now provided under the terms of the GNU General Public License version 2 or later, see tests/COPYING for more details. 2018-12-10 03:00:00 +03:00			`* SPDX-License-Identifier: LGPL-2.1-or-later`
Introduce static_assert We are going to use static_assert provided by <assert.h> or, if it doesn't work, our cheap imitation that doesn't display the message specified as the second argument of static_assert. * configure.ac (AC_CACHE_CHECK): Check for static_assert in <assert.h>, define HAVE_STATIC_ASSERT if it is available. * static_assert.h: New file. * Makefile.am (strace_SOURCES): Add it. 2018-04-04 01:52:54 +03:00			`*/`

			`#ifndef STRACE_STATIC_ASSERT_H`
			`#define STRACE_STATIC_ASSERT_H`

			`#include "assert.h"`

build: try to use _Static_assert if static_assert is not available * configure.ac: Check for _Static_assert if static_assert is not available. * static_assert.h [!HAVE_STATIC_ASSERT && HAVE__STATIC_ASSERT] (static_assert): Define to _Static_assert. 2018-04-27 10:19:52 +03:00			`#if defined HAVE_STATIC_ASSERT`

			`/* static_assert is already available */`

			`#elif defined HAVE__STATIC_ASSERT`

			`# undef static_assert`
			`# define static_assert _Static_assert`

			`#else /* !HAVE_STATIC_ASSERT && !HAVE__STATIC_ASSERT */`
Introduce static_assert We are going to use static_assert provided by <assert.h> or, if it doesn't work, our cheap imitation that doesn't display the message specified as the second argument of static_assert. * configure.ac (AC_CACHE_CHECK): Check for static_assert in <assert.h>, define HAVE_STATIC_ASSERT if it is available. * static_assert.h: New file. * Makefile.am (strace_SOURCES): Add it. 2018-04-04 01:52:54 +03:00
			`# define static_assert(expr, message) \`
			`extern int (strace_static_assert(int))[sizeof(int[2 !!(expr) - 1])]`

			`#endif`

			`#endif /* !STRACE_STATIC_ASSERT_H */`