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10650
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1 /* ignore a value to quiet a compiler warning |
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2 |
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3 Copyright (C) 2008 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 Jim Meyering. */ |
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19 |
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20 #ifndef __attribute__ |
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21 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) |
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22 # define __attribute__(x) |
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23 # endif |
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24 #endif |
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25 |
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26 /* Use this function to avoid a warning when using a function declared with |
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27 gcc's warn_unused_result attribute, but for which you really do want to |
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28 ignore the result. Traditionally, people have used a "(void)" cast to |
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29 indicate that a function's return value is deliberately unused. However, |
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30 if the function is declared with __attribute__((warn_unused_result)), |
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31 gcc issues a warning even with the cast. |
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32 |
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33 Caution: most of the time, you really should heed gcc's warning, and |
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34 check the return value. However, in those exceptional cases in which |
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35 you're sure you know what you're doing, use this function. |
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36 |
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37 For the record, here's one of the ignorable warnings: |
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38 "copy.c:233: warning: ignoring return value of 'fchown', |
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39 declared with attribute warn_unused_result". */ |
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40 |
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41 static inline void |
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42 ignore_value (int i __attribute__ ((__unused__))) |
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43 { |
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44 /* empty */ |
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45 } |
