Is Allegro open source (OSI) compatible?

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Is Allegro open source (OSI) compatible?
See the previous question. Since Allegro is compatible with about any license, it also is OSI compatible. It clearly is compatible with all the points in the OSD (open source definition). You can search the OSI mailing list for "Allegro" to see that OSI shares this view. (OSI officials still were reluctant to consider it for approval though and suggested to use an existing license like MIT instead.)