From mboxrd@z Thu Jan 1 00:00:00 1970 From: Giovanni Biscuolo Subject: Perl modules dual licensing (was Re: Bioconductor package flowPeaks license Artistic 1.0?) Date: Fri, 20 Dec 2019 11:24:37 +0100 Message-ID: <87k16r70re.fsf@roquette.mug.biscuolo.net> References: <87pnlz9lro.fsf@elephly.net> <877e869t80.fsf@elephly.net> <87k16si685.fsf@nckx> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha512; protocol="application/pgp-signature" Return-path: Received: from eggs.gnu.org ([2001:470:142:3::10]:35739) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iiFSy-0001v2-Dw for guix-devel@gnu.org; Fri, 20 Dec 2019 05:25:05 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iiFSw-0000Sm-Co for guix-devel@gnu.org; Fri, 20 Dec 2019 05:25:03 -0500 Received: from ns13.heimat.it ([46.4.214.66]:49392) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1iiFSv-0000IN-TA for guix-devel@gnu.org; Fri, 20 Dec 2019 05:25:02 -0500 In-Reply-To: List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org Sender: "Guix-devel" To: zimoun , Tobias Geerinckx-Rice Cc: Guix Devel --=-=-= Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Hi zimoun zimoun writes: [...] > Where is the License of Perl 5 and below explicitly defined? There is > no pointer... Ricardo pointed you to https://dev.perl.org/licenses/, that is a web version of this=20 https://perl5.git.perl.org/perl5.git/blob/HEAD:/README Perl is dual licensed at least since 1994-10-17 (see the README history [1] > What I understand is: when the License of Perl 5 There is no "License of Perl 5", it is Perl 5 that is dual licensed The same dual license scheme is usually (usually?!?) adopted by Perl modules, at least those on CPAN http://www.cpan.org/misc/cpan-faq.html#How_is_Perl_licensed > and below is used, then the copyright holder chooses either the > Artistic 1.0, either the GPL. Then the License of Perl 5 and below is > free but non-copyleft. Since there is no "License of Perl 5" that license cannot be qualified :-) > Well, it appears to me a hack. I guess that there is a lot of Perl > packages under Artistic 1.0 which seems an issue. I don't know how many packages/modules are distributed only using Artistic License 1.0, but please consider that as I said above that *many* are dual licensed. The fact that Perl modules are (must?) commonly dual licensed is somewhat a mystery to me, but I do not care :-D > So let create this License of Perl 5 and below saying: choose between > Artistic 1.0 or GPL. And because you have this choice, everything is > fine. > > I probably misread No, you do not misread: dual licensing is used in many situation and is non a "hack", it's the decision of the copyright holder to allow different legal uses of the software In this particular case, **fortunately** the dual licensing was adopted "since the beginning" to fix the problems with Artistic License [...] Last things about names: since Oct 2019 [2] Perl 5 is Perl (Perl 4 is gone long ago) and Perl 6 is Raku, so finally there is no more need to say "Perl 5" :-) Ciao! Gio' [1] https://perl5.git.perl.org/perl5.git/history/HEAD:/README [2] https://lwn.net/Articles/802329/ =2D-=20 Giovanni Biscuolo Xelera IT Infrastructures --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEERcxjuFJYydVfNLI5030Op87MORIFAl38oWYACgkQ030Op87M ORIUAA/9ELo2V+PsYUimG56UQO7mxtRpOvHsd8ZSpeH9cR3ECULVffkcR0t8i1V5 gi4isvPR0pEj8UL54WyyHzb2Derp7OFd0BGB2bniRkcATy7KVJleGTdCa4GQ3Nno IAamywHnymSFclUIqjhgE8S1aI1S+GXWnVlJzLioEXe1gIzp1gVgcQafGocmLPHF CxGZiPuX/EO2SqzPXn6Kt0uV5vUF7yVcnwQtUgVmc0k1DLalGYJY9gLYmtZ3oQel XpSg2p6eluqh7Lqz9BJkZPsGYKXdWjk/MdS2VzHrtLJ2fuVAA5DlHjE04hNaZ+7Z 6LGhVgXnELtqe0khlaF95fuu+oI4HhJygeCB5o4ap1TPBhX5jwQpY4WifkxnXhQ8 n2Kst2tKM3X/pRqRyh4KJJbKd6FZhMFBxLDWqpf2DM10hhonE4TxuXZpc1OEgtat LfknuaV6i/4VvsWETZ6dcS4MHKE6pQJoH63jvVbZrMaGcVNrzhZHwM3r4E5Rv+VD cr22OER8tjbyjjD5VF0evxrNLOAQcpiDpx1MbYlc8w2LBuc0K6TOB4fmj/zN7VQT N5ieS0O8Nr5GazjiWSxOjUxGwvbE6QLlR2m8NoWFjU/EkQpWUKinGax+x81+1ZD0 BJsMBHVf8GWO+V32yghab9v3qh8wEmidXTHy2SGAGZOvS+DmthY= =lBe/ -----END PGP SIGNATURE----- --=-=-=--