c common functions library extracted from my open source project FastDFS. this library is very simple and stable. functions including: string, logger, chain, hash, socket, ini file reader, base64 encode / decode, url encode / decode, fast timer, skiplist, object pool etc. detail info please see the c header files.
https://github.com/happyfish100/libfastcommon/blob/aa2fc62cbb3b02a544922e6cf35eac6e423f97de/src/sockopt.c#L1871 应该放在 #endif 外面吧