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Add warn_unused_result check, attribute only supported by GCC 3.4 or later

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warn_unused_result was introduced in GCC version 3.4.

Change-Id: I6c2cc938d2b868ddfe0889cc41d7fa9d70e1b907
This commit is contained in:
Patrick Farrell 2016-04-05 16:59:07 -04:00 • committed by Andy Green
parent 67729c954f
commit 72e0e2a516
1 changed files with 8 additions and 1 deletions
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9
lib/libwebsockets.h
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@ -170,8 +170,15 @@ struct sockaddr_in;
#endif
#if defined(__GNUC__)
/* warn_unused_result attribute only supported by GCC 3.4 or later */
#if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
#define LWS_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
#else
#define LWS_WARN_UNUSED_RESULT
#endif
#define LWS_VISIBLE __attribute__((visibility("default")))
#define LWS_WARN_UNUSED_RESULT __attribute__ ((warn_unused_result))
#define LWS_WARN_DEPRECATED __attribute__ ((deprecated))
#else
#define LWS_VISIBLE