How to install JSON.pm perl module on OSX

Question

I am trying to use the po2json parser/converter from the JS gettext library (http://jsgettext.berlios.de/), but when I try to convert I get this error:

Can't locate JSON.pm in @INC (@INC contains: /Library/Perl/5.12/darwin-thread-multi-2level /Library/Perl/5.12 /Network/Library/Perl/5.12/darwin-thread-multi-2level /Network/Library/Perl/5.12 /Library/Perl/Updates/5.12.4 /System/Library/Perl/5.12/darwin-thread-multi-2level /System/Library/Perl/5.12 /System/Library/Perl/Extras/5.12/darwin-thread-multi-2level /System/Library/Perl/Extras/5.12 .) at ./po2json line 23.
BEGIN failed--compilation aborted at ./po2json line 23.

As far as I understand I am missing a perl module, namely JSON.pm, an I think it's this one: http://cpansearch.perl.org/src/MAKAMAKA/JSON-2.53/lib/JSON.pm

Now, how do I install it on OSX? I am using Mountain Lion.

I tried to do cpan install JSON, but it doesn't work, I get the following error:

Writing Makefile for JSON
  MAKAMAKA/JSON-2.53.tar.gz
  make -- NOT OK
'YAML' not installed, will not store persistent state
Running make test
  Can't test without successful make
Running make install
  Make had returned bad status, install seems impossible

Answer 1

Use homebrew to install cpanm:

brew install cpanm

Then you can install JSON with

sudo cpanm install JSON

Answer 2

The output said that make didn't return success. Probably due to some dependency. Try using cpanm http://search.cpan.org/~miyagawa/App-cpanminus-1.5017/bin/cpanm, it's really hassle free and bootstrapped quite well (no need to install other stuff).

Install using this:

curl -L http://cpanmin.us | perl - --sudo App::cpanminus