Index: ext/posix/sys/resource.c
--- ext/posix/sys/resource.c.orig	2015-01-04 13:08:20.000000000 +0100
+++ ext/posix/sys/resource.c	2015-01-12 21:03:19.176366288 +0100
@@ -153,8 +153,12 @@
 	lua_setfield(L, -2, "version");
 
 	LPOSIX_CONST( RLIM_INFINITY	);
+#ifdef RLIM_SAVED_CUR
 	LPOSIX_CONST( RLIM_SAVED_CUR	);
+#endif
+#ifdef RLIM_SAVED_MAX
 	LPOSIX_CONST( RLIM_SAVED_MAX	);
+#endif
 	LPOSIX_CONST( RLIMIT_CORE	);
 	LPOSIX_CONST( RLIMIT_CPU	);
 	LPOSIX_CONST( RLIMIT_DATA	);
Index: ext/posix/sys/socket.c
--- ext/posix/sys/socket.c.orig	2015-01-04 13:08:20.000000000 +0100
+++ ext/posix/sys/socket.c	2015-01-12 21:07:04.526404421 +0100
@@ -29,6 +29,7 @@
 #if HAVE_LINUX_NETLINK_H
 #include <linux/netlink.h>
 #endif
+#include <sys/types.h>
 #include <sys/socket.h>		/* Needs to be before net/if.h on OpenBSD 5.6 */
 #ifdef HAVE_NET_IF_H
 #include <net/if.h>
@@ -36,9 +37,14 @@
 #include <netdb.h>
 #include <netinet/in.h>
 #include <netinet/tcp.h>
+#if 0
 #include <netinet/udp.h>
+#endif
 #include <sys/un.h>
 #include <sys/types.h>
+#if !defined(PF_UNSPEC) && defined(AF_UNSPEC)
+#define PF_UNSPEC AF_UNSPEC
+#endif
 
 /* strlcpy() implementation for non-BSD based Unices.
    strlcpy() is a safer less error-prone replacement for strncpy(). */