ipv6 problem

hye
i am working in drdl. i am creating socket library for IPv6 in Linux OS.
i did a sample program giving AF_INET6 to socket function.
but when i compiled the program, it is saying that Family not supported.
for compilation i gave the following command:

g++ -o server server.cpp

i want to know how to compile programs for IPv6. what are the linker options we have to give. since i month i am facing this problem.

reply as soon as possible.
thank you
bye