compile kwtls patch - wtls support

Hi,

I am currently using Kannel 1.3.1 as a wap gateway.
Now I need wtls connections. that's why I am trying to
use kwtls patch. 
But I could not get it compile...

Below is the error output from the "make" command.
Can anyone help me with that ?

***
cc -Wall -D_REENTRANT=1 -g -I/usr/include/gnome-xml
-I. -I/usr/local/ssl/include
 -L/usr/local/ssl/lib -o kwtls kwtls.o libwtls.a -lz
-lpthread -lnsl -lm  -L/usr
/lib -lxml -lz -lcrypto
Undefined                       first referenced
 symbol                             in file
socket                              libwtls.a(udp.o) 
(symbol belongs to implicit dependency
/usr/lib/libsocket.so.1)
send                                libwtls.a(wdp.o) 
(symbol belongs to implicit dependency
/usr/lib/libsocket.so.1)
bind                                libwtls.a(udp.o) 
(symbol belongs to implicit dependency
/usr/lib/libsocket.so.1)
inet_aton                           libwtls.a(udp.o)
sendto                              libwtls.a(udp.o) 
(symbol belongs to implicit dependency
/usr/lib/libsocket.so.1)
recvfrom                            libwtls.a(udp.o) 
(symbol belongs to implicit dependency
/usr/lib/libsocket.so.1)
connect                             libwtls.a(wdp.o) 
(symbol belongs to implicit dependency
/usr/lib/libsocket.so.1)
ld: fatal: Symbol referencing errors. No output
written to kwtls
collect2: ld returned 1 exit status
make: *** [kwtls] Error 1

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