Hi, I was making changes to 4.5 source code. I tried to recompile the kernel. it compiles well but is not able to link it. I used the function inet_aton in uipc_socket.c This is the error i got. uipc_socket.o(.text+0xid8): undefined refernce to '__inet_aton' I added all the header files that were required. Can anyone tell what is missing. Thanks. sandeep.