From the 'gcc' manpage (trimmed for context):

       -llibrary
           Search the library named library when linking.

           The linker searches a standard list of directories for the library, which is actually a file named liblibrary.a.
           The linker then uses this file as if it had been specified precisely by name.

In other words, you need to make sure that you have the appropriate development library files - i.e., "liblz.a", "libcrypt.a", and "libinsl.a" - installed on your system, in the appropriate directories (where the compiler will find them.)

-- 
Human history becomes more and more a race between education and catastrophe. -- HG Wells