| 1 | /* Test the "ignore-value" module.
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| 2 |
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| 3 | Copyright (C) 2011-2012 Free Software Foundation, Inc.
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| 4 |
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| 5 | This program is free software: you can redistribute it and/or modify
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| 6 | it under the terms of the GNU General Public License as published by
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| 7 | the Free Software Foundation; either version 3 of the License, or
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| 8 | (at your option) any later version.
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| 9 |
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| 10 | This program is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU General Public License
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| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */
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| 17 |
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| 18 | /* Written by Eric Blake. */
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| 19 |
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| 20 | #include <config.h>
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| 21 |
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| 22 | #include "ignore-value.h"
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| 23 |
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| 24 | #include <stdio.h>
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| 25 |
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| 26 | #ifndef _GL_ATTRIBUTE_RETURN_CHECK
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| 27 | # if __GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4)
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| 28 | # define _GL_ATTRIBUTE_RETURN_CHECK
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| 29 | # else
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| 30 | # define _GL_ATTRIBUTE_RETURN_CHECK __attribute__((__warn_unused_result__))
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| 31 | # endif
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| 32 | #endif
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| 33 |
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| 34 | struct s { int i; };
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| 35 | static char doChar (void) _GL_ATTRIBUTE_RETURN_CHECK;
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| 36 | static int doInt (void) _GL_ATTRIBUTE_RETURN_CHECK;
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| 37 | static off_t doOff (void) _GL_ATTRIBUTE_RETURN_CHECK;
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| 38 | static void *doPtr (void) _GL_ATTRIBUTE_RETURN_CHECK;
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| 39 | static struct s doStruct (void) _GL_ATTRIBUTE_RETURN_CHECK;
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| 40 |
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| 41 | static char
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| 42 | doChar (void)
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| 43 | {
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| 44 | return 0;
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| 45 | }
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| 46 |
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| 47 | static int
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| 48 | doInt (void)
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| 49 | {
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| 50 | return 0;
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| 51 | }
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| 52 |
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| 53 | static off_t
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| 54 | doOff (void)
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| 55 | {
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| 56 | return 0;
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| 57 | }
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| 58 |
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| 59 | static void *
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| 60 | doPtr (void)
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| 61 | {
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| 62 | return NULL;
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| 63 | }
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| 64 |
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| 65 | static struct s
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| 66 | doStruct (void)
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| 67 | {
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| 68 | static struct s s1;
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| 69 | return s1;
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| 70 | }
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| 71 |
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| 72 | int
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| 73 | main (void)
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| 74 | {
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| 75 | /* If this test can compile with -Werror and the same warnings as
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| 76 | the rest of the project, then we are properly silencing warnings
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| 77 | about ignored return values. */
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| 78 | ignore_value (doChar ());
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| 79 | ignore_value (doInt ());
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| 80 | ignore_value (doOff ());
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| 81 | ignore_value (doPtr ());
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| 82 | ignore_value (doStruct ());
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| 83 | return 0;
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| 84 | }
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