When you do derivative work in accordance to GPL you are supposed to publish your alterations with the source code in its full for other to do derivative work off of that. (In Accordance with the GPL licensing form, even the LGPL has this clause and is clearly stated.)
You are allowed to make money off of GPL licensed software in the form of service and support costs - for like setting it up, making stuff work and so on. The absolute best example of this is Redhat Enterprise products - they are great at licensing their support and service on top of GPL software they have programmed and released back to the eco system in form of source and documentation. They don't support or service what they make in-house and release back - unless you pay for it, and that is Ok - and remember, they develop ALOT of code for Linux based systems. If they started to withold parts of that work and apply a cost to it - well lets say Linux would not have been as widespread as it is today. And i dont think the interest for LinuxCNC would dwindle soon, it has been around for a long time, and you have forks like machinekit that will make the work go forward. Its like saying Debian would go away if Ubuntu havent existed.. (an example of derivative work) // Andreas Marius Liebenberg skrev den 2015-02-18 06:44: > I am sure that they will release the controller code at some time. There > is no real money to be made from the controller. It just means that they > sell their machines easier. I convert machines and build new machines > and I do not charge for the software. I do charge for my time to set it > up. The profit comes from the machine. I am sure that Tormach has the > same situation. I just dont sell enough machines :( > One has to realize that as with all things, if someone does not make > money somewhere down the line, the interest will dwindle soon. > > > ------ Original Message ------ > From: "Sebastian Kuzminsky" <s...@highlab.com> > To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > Sent: 2015-02-18 05:07:39 > Subject: Re: [Emc-users] PathPilot > >> On 2/17/15 6:52 PM, Pete Matos wrote: >>> I guess we will have to agree to disagree... I feel like MANY MANY >>> people >>> have given freely of their time to make linuxCNC into what it is >>> today >>> INCLUDING things like User interfaces and many many other add ons >>> that make >>> the program so enjoyable and stable to use. They gave of it freely >>> and >>> willingly and I thank ALL of them for their efforts. If you ask me >>> ANYONE >>> who takes that work and changes it and makes it better for whatever >>> reason >>> owes it to all of those who came before to give of it freely. >>> ESPECIALLY if >>> you intend to put your name on it and profit from it! I really do not >>> understand the lack of interest in pursuing this here. I appreciate >>> that >>> they paid for the work on the TP but again that is something added to >>> the >>> collective work that MANY MANY others have done. I think the least >>> they >>> could do is to make it available to the community as a whole in some >>> shape >>> or form. I am sorry but I have to disagree with you here.. Peace >> I am no lawyer, but i believe Tormach has created a derivative work[0] > >from LinuxCNC. According to the GNU General Public License[1] under >> which LinuxCNC is published, Tormach is now legally required to provide >> the source code of their derivative work. The normal way to do this >> would be to publish a link to a git repo. >> >> 0: http://www.linuxjournal.com/article/6366 >> 1: http://www.gnu.org/licenses/gpl-2.0.html >> >> Tormach has displayed good will towards individual members of our >> community, and towards the community as a whole, and i hope and believe >> they will continue to do so by following the spirit of the community as >> well as the letter of the law. >> >> >> -- >> Sebastian Kuzminsky >> >> ------------------------------------------------------------------------------ >> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server > >from Actuate! 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