Where can I find printed docs on how to build external modules on MacOS X?
Unless I'm misunderstanding you, building (presumably: installing) Perl modules on Mac OS X is not fundamentally different from doing so on any other OS. A Perl module, such as any one available from CPAN, can be installed in an automated way via CPAN.pm or more manually via perl Makefile.PL;make;make test;make install. Modules with .XS components require a C compiler to be installed; modules without do not.
If that answers your concern, then any web site with the standard Perl documentation can be printed out. www.perldoc.com seems to be down for the count, but I found this location today: http://perldoc.perldrunks.org/
Here, for example, is a link to the page corresponding to 'perldoc perlmodinstall': http://perldoc.perldrunks.org/perlmodinstall.html
HTH
jimk
