Installing perlbrew is easy. Just follow the instructions on http://perlbrew.pl
Whats a little bit trickier is learning to use perlbrew to build perl with the same options you would expect on a running system. The standard command 'perlbrew install perl-5.X.X' will easily compile and install a plain version of perl with no problems. If you want to enable threads, use the perl malloc, or any other compile time customizations, then you probably need to read the perlbrew docs.