Thanks ikegami,

As soon as I saw your `which` command I knew I didn't try hard enough on setting up the environment.  Moreover, my question and intention were actually thoughtless casue I don't have those gcc and friends on hand to proceed further. 

And it is not a good practice to put these stuff on a network appliance style machine.  So I guess I will symlink the perl from squid and live with local::lib + pure perl modules.