1 /* unused-result.h -- macros for ensuring callers don't ignore return values
2 Copyright (C) 2010, Free Software Foundation, Inc.
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.
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.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 /* Taken from coreutils' fts_.h */
19 #ifndef _UNUSED_RESULT_H
20 # define _UNUSED_RESULT_H 1
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))
27 # define __GNUC_PREREQ(maj, min) 0
31 # if __GNUC_PREREQ (3,4)
32 # undef __attribute_warn_unused_result__
33 # define __attribute_warn_unused_result__ \
34 __attribute__ ((__warn_unused_result__))
36 # define __attribute_warn_unused_result__ /* empty */