DNS MX Query in C

[Hand$hake]

Hi,

I looled for a way of queriying an MX record of a particular domain.
After googling with different keyword, I found the article "E-mail Architecture part II" ( http://www.linuxforums.org/network/e...e_part_ii.html )

I tried to compile the code with gcc without modifiying it, and I have the following error message:

gcc mx.c 
/tmp/ccglAdMp.o: In function `getmxip':
mx.c:(.text+0x109): undefined reference to `__res_query'
mx.c:(.text+0x221): undefined reference to `__dn_skipname'
mx.c:(.text+0x2b9): undefined reference to `__dn_expand'
mx.c:(.text+0x3ab): undefined reference to `__dn_expand'

Is there another library to include to use these functions ?

Thanks

[Hand$hake]

I found the solution: I just had to compile with -lresolv option.