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system.h: define ATTRIBUTE_WARN_UNUSED_RESULT

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* src/system.h (ATTRIBUTE_WARN_UNUSED_RESULT): Define.
This commit is contained in:
Jim Meyering
2010-07-05 17:16:23 +02:00
parent 09fcf494a1
commit 61aae73f54
1 changed files with 8 additions and 0 deletions
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8
src/system.h
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@@ -483,6 +483,14 @@ enum
# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
#endif
/* The warn_unused_result attribute appeared first in gcc-3.4.0 */
#undef ATTRIBUTE_WARN_UNUSED_RESULT
#if __GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4)
# define ATTRIBUTE_WARN_UNUSED_RESULT /* empty */
#else
# define ATTRIBUTE_WARN_UNUSED_RESULT __attribute__ ((__warn_unused_result__))
#endif
#if defined strdupa
# define ASSIGN_STRDUPA(DEST, S) \
do { DEST = strdupa (S); } while (0)