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theHobbit
Joined: 30 Sep 2006
Posts: 65
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 Posted: Thu Jun 18, 2009 2:46 am Post subject: Question about GPL licence |
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Hi there, i was reading about open source licences (especially the GPL and LGPL licences) the other day.
But there is something a didn't understand quite well, for example if i use the SDL library wich is
licenced under LGPL, with no modifications in my app, do i have to release the source
code of the app? |
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jojojoris
Joined: 30 Mar 2008
Posts: 261
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| Posted: Thu Jun 18, 2009 3:18 am Post subject: Re: Question about GPL licence |
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| Quote: | The GNU Lesser General Public Licence
The LGPL is similar to the GPL, but is more designed for software libraries where you want to allow non-GPL applications to link to your library and utilise it. If you modify the software, you still have to give back the source code, but you are allowed to link it with proprietary stuff without giving the source code to all of that back. |
So if you don't modifie SDL you don't have to publish yout source.
_________________
| Code: | int main(){
SetupCallbacks();
makeNiceGame();
sceKernelExitGame();
} |
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J.F.
Joined: 22 Feb 2004
Posts: 2906
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| Posted: Thu Jun 18, 2009 5:50 am Post subject: |
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| The main difference of the LGPL is you never have to give the source for YOUR program. If you modify the LGPL lib, then you have to give the changes you made to the lib. Your program remains your program. That is why the vast majority of libraries in linux are LGPL - that allows closed-source proprietary software to be run on linux. That is why Gnome is used for nearly all such programs instead of QT - QT requires a commercial license for closed source, so if you don't pay the license, you're stuck with the GPL license. I think they finally changed that within the last year to try to encourage commercial apps on KDE. |
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kralyk
Joined: 06 Apr 2008
Posts: 114
Location: Czech Republic, central EU
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J.F.
Joined: 22 Feb 2004
Posts: 2906
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| Posted: Thu Jun 18, 2009 6:59 am Post subject: |
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I forget when they did that exactly, but it took away one of the major points for using Gnome over KDE. It made some folks happy, and others mad. |
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theHobbit
Joined: 30 Sep 2006
Posts: 65
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| Posted: Thu Jun 18, 2009 11:32 am Post subject: |
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| Now i get it, thanks everyone for your answers. |
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