Via http://bugs.gentoo.org/show_bug.cgi?id=229603 --- lash-0.5.4/liblash/socket.c 2008-06-26 15:20:44.227064193 +0200 +++ lash-0.5.4/liblash/socket.c 2008-06-26 15:21:18.245063129 +0200 @@ -20,6 +20,11 @@ #define _POSIX_SOURCE /* addrinfo */ +#ifdef LASH_BUILD +#define _GNU_SOURCE +#include "config.h" +#endif /* LASH_BUILD */ + #include <stdint.h> #include <sys/types.h> #include <sys/socket.h>