1  /* Linux definitions of functions used by static libc main startup.
       2     Copyright (C) 2017-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #ifdef SHARED
      20  # include_next <startup.h>
      21  #else
      22  # include <sysdep.h>
      23  
      24  /* Avoid a run-time invocation of strlen.  */
      25  #define _startup_fatal(message)                                         \
      26    do                                                                    \
      27      {                                                                   \
      28        size_t __message_length = __builtin_strlen (message);             \
      29        if (! __builtin_constant_p (__message_length))                    \
      30          {                                                               \
      31            extern void _startup_fatal_not_constant (void);               \
      32            _startup_fatal_not_constant ();                               \
      33          }                                                               \
      34        INTERNAL_SYSCALL_CALL (write, STDERR_FILENO, (message),           \
      35                               __message_length);                         \
      36        INTERNAL_SYSCALL_CALL (exit_group, 127);                          \
      37      }                                                                   \
      38    while (0)
      39  #endif  /* !SHARED */