Can't locate Switch.pm in @INC

　　the perl version (5.14) shipped with 12.10 does not include the Switch.pm module needed while building WebKiT-GTK.

How to install Perl Switch.pm module required to build WebKit-GTK?

　　If you want to install the Switch.pm Perl module into your system Perl config, there are two methods of installing it:

1. Install it through the Ubuntu repositories.
2. Install the .pm through CPAN.

　　At this time, both will provide the current version of this module(2.16).

Installing Switch.pm using the Ubuntu repositories:

• From the command-line, the installation can be completed by running the following command from the terminal (Ctrl-Alt-t):
• sudo apt-get install libswitch-perl
  • Within Synaptic, right-click on the libswitch-perl package, select Mark for installation, then click on the Apply button.
  • Within the Ubuntu Software Center (USC), search for the phrase libswitch-perl, highlight the package and select install:

Installing Switch.pm using CPAN:

　　If you would prefer to install this via cpan, follow these instructions:

• Open a terminal(Ctrl-Alt-t).
• Enter the command cpan.
• At the prompt cpan[1]>, type install Switch.
• Once completed, Type exit.

　　The Switch.pm Perl module will now be available for you to use in your scripts.

参考：

　　http://askubuntu.com/questions/204481/how-to-install-perl-switch-pm-module-required-to-build-webkit-gtk