WHY?

Dist-Zilla is a popular tool for building CPAN distributions. Build process is controlled by dist.ini, Dist-Zilla configuration file. A distribution author can specify license covering his work by a line in dist.ini file:

license = NAME

where NAME is a name of module from Software::License hierarchy.

Software-License is shipped with a set of popular licenses, from Apache_1_1 to Zlib, including GNU General Public licenses (GPL) GPL_1, GPL_2, GPL_3, including their "Lesser" and "Affero" variants (LGPL_2_1 and <AGPL_3>, to name a few).

So, if a developer wants to release his work under GPLv3 license terms, he should write in his dist.ini:

license = GPL_3

However, Free Software Foundation recommends using clause "license version N or (at your option) any later version". Unfortunately, Software-License distribution does not supply (out of the box) a way to express such clause.

Software-License-OrLaterPack fulfills the lack, at least partially.

To install Software::License::GPL_3::or_later, copy and paste the appropriate command in to your terminal.

cpanm

cpanm Software::License::GPL_3::or_later

CPAN shell

perl -MCPAN -e shell
install Software::License::GPL_3::or_later

For more information on module installation, please visit the detailed CPAN module installation guide.

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WHY?

Module Install Instructions