Ben Ramsey explores some of the issues when you write GPLed code that uses code from the PEAR library.
I had forgotten about the differing licenses used by PEAR and WordPress. They’re unfortunately incompatible and you can’t ship PHP licensed code in a GPL project without an “exception clause” in your GPL license. A change to the license of WordPress would require the agreement of *all* copyright holders of code in the project AFAIK.
Thankfully, I don’t ship PEAR Cache with WordPress MU. I use it if it’s installed already, WPMU isn’t dependant on PEAR Cache being available to work.
I think that gets around the incompatibility. Doesn’t it?
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