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A comment on PG: Arc Likely To Be Open-Sourced This Winter. Parent comment

Re:PG: Arc Likely To Be Open-Sourced This Winter by soundsop on Tuesday January 15, 2008 @02:46AM (#98602)
BSD license allows you to re-use fixes of others (assuming they also release their fix under BSD), but it does not compel them them to reveal their fix if they distribute only a binary.

GPLv2 requires modified public distributions to also be under GPLv2, so you could both see the fix/change and use it (in the sense that you won't be infringing on copyright).

GPLv3 adds patent protection, so someone adding a fix/change that they have also patented explicitly grants a license for that patent.

I think GPLv3 is the most comprehensive way to keep fixes/changes of others available for reuse.

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Re:PG: Arc Likely To Be Open-Sourced This Winter by dag on Tuesday January 15, 2008 @06:22AM (#98642)
If you use the GPL you will want to add a lisp-specific preamble such as is found in the LLGPL (http://opensource.franz.com/preamble.html).
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Re:PG: Arc Likely To Be Open-Sourced This Winter by anewaccountname on Thursday January 17, 2008 @08:04PM (#100080)
Don't forget that if you use the GPLv3 you won't be able to distribute your software with the OLPC, since it has anti-theft measures which put signed code at an advantage to unsigned.
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