WARN_UNUSED_RESULT 42 internal.h #define WARN_UNUSED_RESULT(x) x __attribute__((__warn_unused_result__)) WARN_UNUSED_RESULT 44 internal.h #define WARN_UNUSED_RESULT(x) x __attribute__((__warn_unused_result__)) WARN_UNUSED_RESULT 46 internal.h #define WARN_UNUSED_RESULT(x) x