1  /* unused-result.h -- macros for ensuring callers don't ignore return values
       2     Copyright (C) 2010-2022 Free Software Foundation, Inc.
       3  
       4     This program is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published by
       6     the Free Software Foundation, either version 3 of the License, or
       7     (at your option) any later version.
       8  
       9     This program is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program.  If not, see <https://www.gnu.org/licenses/>.
      16  */
      17  
      18  /* Taken from coreutils' fts_.h */
      19  #ifndef INC_UNUSED_RESULT_H
      20  # define INC_UNUSED_RESULT_H 1
      21  
      22  # ifndef __GNUC_PREREQ
      23  #  if defined __GNUC__ && defined __GNUC_MINOR__
      24  #   define __GNUC_PREREQ(maj, min) \
      25            ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
      26  #  else
      27  #   define __GNUC_PREREQ(maj, min) 0
      28  #  endif
      29  # endif
      30  
      31  # if __GNUC_PREREQ (3,4)
      32  #  undef __attribute_warn_unused_result__
      33  #  define __attribute_warn_unused_result__ \
      34      __attribute__ ((__warn_unused_result__))
      35  # else
      36  #  define __attribute_warn_unused_result__ /* empty */
      37  # endif
      38  
      39  #endif