[Nauty-list] installation question

[Bryan Petrak]

I have installed nauty and can get dreadnaut to work, but when i try 
compiling the example program i get errors that say the nauty commands 
are not defined.  In particular this is what happens

[ananke:~ petrak]$ gcc nautyex.c
/tmp/cc0MArY7.o: In function `main':
nautyex.c:(.text+0xbe): undefined reference to `nauty_check'
nautyex.c:(.text+0x252): undefined reference to `nauty'
/tmp/cc0MArY7.o:(.data+0x8c4): undefined reference to `dispatch_graph'
collect2: ld returned 1 exit status


How do i work around this problem?
Thanks