1. Advertising
    y u no do it?

    Advertising (learn more)

    Advertise virtually anything here, with CPM banner ads, CPM email ads and CPC contextual links. You can target relevant areas of the site and show ads based on geographical location of the user if you wish.

    Starts at just $1 per CPM or $0.10 per CPC.

GPL / LGPL usage question.

Discussion in 'Legal Issues' started by Greg-J, Apr 11, 2006.

  1. #1
    I'm not sure if the FSF did more harm than good with the GPL/LGPL, but I'm definitely confused.

    If I am developing a program or script and find a particular function, or class that is licensed under the GPL or LGPL that would work, or at least work with some modification, faster than writing it all myself; Can I use this code if I am going to sell my software commercially?
    SEMrush
     
    Greg-J, Apr 11, 2006 IP
    ryan_uk likes this.
    SEMrush
  2. clancey

    clancey Peon

    Messages:
    1,100
    Likes Received:
    63
    Best Answers:
    0
    Trophy Points:
    0
    #2
    Under most of the licenses I am aware of, you can include GPLed code and sell the software. However, you must make the full source code for the software available to the buyer in order to satisfy the license.

    If this is a problem, then you should be buying commercial libraries which allow you to use them in commercial software. Alternatively, you will need to create your own function.
     
    clancey, Apr 11, 2006 IP
  3. oldcowhand

    oldcowhand Guest

    Messages:
    52
    Likes Received:
    1
    Best Answers:
    0
    Trophy Points:
    0
    #3
    You must make the GPL'ed code available, to be sure, but the GPL "license" is written in a way that does NOT make it clear what you must do with your modifications. In court, the FSF would be hard pressed to defend the GPL. They've succeeded so far by browbeating people into settlements.

    The LGPL is the better option, though, since you can link your code to LPGL-licensed code without affecting the license you can attach to your code.
     
    oldcowhand, Apr 12, 2006 IP
  4. Dejavu

    Dejavu Peon

    Messages:
    917
    Likes Received:
    53
    Best Answers:
    0
    Trophy Points:
    0
    #4
    The GPL is like a virus, once you use even the smallest bit of GPL'd code, the sourcecode of your whole application must be available, for free.
    This makes it impossible to use commecial and GPL classes in the same application.
    There is some text that allow you to use GPL code as a plugin for the main application, provided they dont share memory, files, it is not a major part of functionality and whatnot.. not worth it trying to figure out all the rules.

    The LGPL is less restrictive, but I still stay away from it, the license is just too complex, you will allways get people saying you cannot do this or that.
    I just stick to MIT or python licenced software. GPL may be good for the opensource crowd, but it is very anti-business imho.
     
    Dejavu, Apr 12, 2006 IP
    Greg-J likes this.
  5. Greg-J

    Greg-J I humbly return to you.

    Messages:
    1,844
    Likes Received:
    153
    Best Answers:
    0
    Trophy Points:
    135
    #5
    It really is like a virus for any commercial application. I don't think most people actually read the GPL/LGPL before they license their code with it.
     
    Greg-J, Apr 12, 2006 IP
  6. clancey

    clancey Peon

    Messages:
    1,100
    Likes Received:
    63
    Best Answers:
    0
    Trophy Points:
    0
    #6
    I have released code using GPL for the very reason that I want it to remain free and I want ancillary products to be free and open. I have no illusions about the license. I have also released code under a modified Apache open source license. There are so many options.

    When I have a commercial application that I intend to sell, I code it without using any GPLed material. I do not want the hassle.

    When I code for internal use only, I could care less what I use. Nothing related to those projects will ever be for public consumption. No part is recycled -- though I am careful to keep my personals libraries of code separate from those of other people.
     
    clancey, Apr 12, 2006 IP