This is Perl module Test::AllModules.
Test::AllModules installation is straightforward. If your CPAN shell is set up, you should just be able to do
% cpan Test::AllModules
Download it, unpack it, then build it as per the usual:
% perl Makefile.PL % make && make test
Then install it:
% make install
Test::AllModules documentation is available as in POD. So you can do:
% perldoc Test::AllModules
Test::AllModules is hosted on github http://github.com/bayashi/Test-AllModules
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.
Dai Okabayashi <email@example.com>