On 12/16/2014 10:34 AM, wangyufen wrote: > In netinet/in.h, inet6_rth_init() is controled by macro __USE_GNU , > > add "#define __USE_GNU" before #include <netinet/in.h>, that would be OK. This is incorrect, you must define _GNU_SOURCE instead. -- Florian Weimer / Red Hat Product Security