Gentoo::PerlMod::Version This module acts as a reference implementation of how Gentoo maps CPAN and Perl versions, and transforms them into derived versions that are suitable for Gentoo dependency tracking. Perl has several primary formats of versions, the most notable one being "float" style versions, in the form "x.yyyyyyyyyyy" where the number of "y"'s are arbitrary, and are interpreted as a floating point value. That is, 1.001 is NOT the same as 1.01 and 1.1 However, Gentoo's version scheme sees 1.001 similar to 1.001.000 which is similar to 1.1.0 and thus, similar to 1.1. Obviously this will not do, because when somebody says they need ">=1.05 (g:1.5)" expecting "1.06 (g:1.6)", but instead get "1.009 (g:1.9)", things will break. Hence, detection of these cases and normalizing them is essential: 1.001 -> 1.1.0 1.01 -> 1.10.0 1.1 -> 1.100.0 1.05 -> 1.50.0 1.06 -> 1.60.0 1.009 -> 1.9.0 1.9.0 < 1.50.0 < 1.60.0 The simplest use of this library is with the shipped tool, "gentoo-perlmod-version.pl" gentoo-perlmod-version.pl --oneshot 1.06 # 1.6.0 INSTALLATION This is a Perl module distribution. It should be installed with whichever tool you use to manage your installation of Perl, e.g. any of cpanm . cpan . cpanp -i . Consult http://www.cpan.org/modules/INSTALL.html for further instruction. Should you wish to install this module manually, the procedure is perl Makefile.PL make make test make install COPYRIGHT AND LICENSE This software is copyright (c) 2017 by Kent Fredric <email@example.com>. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.