1  /*
       2   * Copyright (c) 2018-2021 Dmitry V. Levin <ldv@strace.io>
       3   * All rights reserved.
       4   *
       5   * SPDX-License-Identifier: LGPL-2.1-or-later
       6   */
       7  
       8  #ifndef STRACE_STATIC_ASSERT_H
       9  # define STRACE_STATIC_ASSERT_H
      10  
      11  # include "assert.h"
      12  
      13  # if defined HAVE_STATIC_ASSERT || defined static_assert
      14  
      15  /* static_assert is already available */
      16  
      17  # elif defined HAVE__STATIC_ASSERT
      18  
      19  #  undef static_assert
      20  #  define static_assert _Static_assert
      21  
      22  # else /* !HAVE_STATIC_ASSERT && !HAVE__STATIC_ASSERT */
      23  
      24  /* Otherwise it is impossible to use the fallback inside functions. */
      25  #  if defined __GNUC__
      26  #   pragma GCC diagnostic ignored "-Wnested-externs"
      27  #  endif
      28  
      29  #  define static_assert(expr, message) \
      30  	extern int (*strace_static_assert(int))[sizeof(int[2 * !!(expr) - 1])]
      31  
      32  # endif
      33  
      34  #endif /* !STRACE_STATIC_ASSERT_H */