On 2012-11-16, SmallAnt wrote: > i embed libev in my program,when compile,there are warnings: > /// > ./libev/ev_poll.c: In function `poll_poll': > ./libev/ev_poll.c:110: warning: left-hand operand of comma expression > has no effect > In file included from ohc_ev.c:7: > ./libev/ev.c: In function `verify_watcher': > ./libev/ev.c:2504: warning: left-hand operand of comma expression has no > effect
Just look at the source: assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); The string has absolutely no effect to the behaviour of the code, so the warning makes sense. However, that string *is* quite useful if the assertion fails: That string will be included in the output, so you'll (hopefully) know what went wrong without going through the source. In general, libev throws *tons* of compiler warnings. Some of them make sense, but they're also completely harmless. Just pass '-w' to the compiler to silence them for libev. (You probably don't want to do that for your own code, unless you care as much about compiler warnings as Marc does :-) Yoran. _______________________________________________ libev mailing list libev@lists.schmorp.de http://lists.schmorp.de/cgi-bin/mailman/listinfo/libev