diff --git a/pjlib/src/pj/sock_common.c b/pjlib/src/pj/sock_common.c
new file mode 100644
index 0000000..4431f59
--- /dev/null
+++ b/pjlib/src/pj/sock_common.c
@@ -0,0 +1,145 @@
+/* $Id$ */
+/* 
+ * Copyright (C)2003-2007 Benny Prijono <benny@prijono.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#include <pj/sock.h>
+
+PJ_DEF(pj_uint16_t) pj_AF_UNIX(void)
+{
+    return PJ_AF_UNIX;
+}
+
+PJ_DEF(pj_uint16_t) pj_AF_INET(void)
+{
+    return PJ_AF_INET;
+}
+
+PJ_DEF(pj_uint16_t) pj_AF_INET6(void)
+{
+    return PJ_AF_INET6;
+}
+
+PJ_DEF(pj_uint16_t) pj_AF_PACKET(void)
+{
+    return PJ_AF_PACKET;
+}
+
+PJ_DEF(pj_uint16_t) pj_AF_IRDA(void)
+{
+    return PJ_AF_IRDA;
+}
+
+PJ_DEF(int) pj_SOCK_STREAM(void)
+{
+    return PJ_SOCK_STREAM;
+}
+
+PJ_DEF(int) pj_SOCK_DGRAM(void)
+{
+    return PJ_SOCK_DGRAM;
+}
+
+PJ_DEF(int) pj_SOCK_RAW(void)
+{
+    return PJ_SOCK_RAW;
+}
+
+PJ_DEF(int) pj_SOCK_RDM(void)
+{
+    return PJ_SOCK_RDM;
+}
+
+PJ_DEF(pj_uint16_t) pj_SOL_SOCKET(void)
+{
+    return PJ_SOL_SOCKET;
+}
+
+PJ_DEF(pj_uint16_t) pj_SOL_IP(void)
+{
+    return PJ_SOL_IP;
+}
+
+PJ_DEF(pj_uint16_t) pj_SOL_TCP(void)
+{
+    return PJ_SOL_TCP;
+}
+
+PJ_DEF(pj_uint16_t) pj_SOL_UDP(void)
+{
+    return PJ_SOL_UDP;
+}
+
+PJ_DEF(pj_uint16_t) pj_SOL_IPV6(void)
+{
+    return PJ_SOL_IPV6;
+}
+
+PJ_DEF(int) pj_IP_TOS(void)
+{
+    return PJ_IP_TOS;
+}
+
+PJ_DEF(int) pj_IPTOS_LOWDELAY(void)
+{
+    return PJ_IPTOS_LOWDELAY;
+}
+
+PJ_DEF(int) pj_IPTOS_THROUGHPUT(void)
+{
+    return PJ_IPTOS_THROUGHPUT;
+}
+
+PJ_DEF(int) pj_IPTOS_RELIABILITY(void)
+{
+    return PJ_IPTOS_RELIABILITY;
+}
+
+PJ_DEF(int) pj_IPTOS_MINCOST(void)
+{
+    return PJ_IPTOS_MINCOST;
+}
+
+PJ_DEF(pj_uint16_t) pj_SO_TYPE(void)
+{
+    return PJ_SO_TYPE;
+}
+
+PJ_DEF(pj_uint16_t) pj_SO_RCVBUF(void)
+{
+    return PJ_SO_RCVBUF;
+}
+
+PJ_DEF(pj_uint16_t) pj_SO_SNDBUF(void)
+{
+    return PJ_SO_SNDBUF;
+}
+
+PJ_DEF(int) pj_MSG_OOB(void)
+{
+    return PJ_MSG_OOB;
+}
+
+PJ_DEF(int) pj_MSG_PEEK(void)
+{
+    return PJ_MSG_PEEK;
+}
+
+PJ_DEF(int) pj_MSG_DONTROUTE(void)
+{
+    return PJ_MSG_DONTROUTE;
+}
+