On Fri, Feb 25, 2011 at 04:39:25PM -0800, Quanah Gibson-Mount wrote:

> Just curious, the GPL and the IPL are not license compatible.  Anyone know 
> how RHEL and other sites deal with this when trying to provide a postfix 
> with mysql tables as an option?

[IANAL]

The MySQL client libraries may also be linked with software available
under various other open-source licenses:

    http://www.mysql.com/about/legal/licensing/foss-exception/

Among these is the Common Public License, which IBM now uses instead of
IPL, but it is not obvious to me that the CPL applies to Postfix.

    http://www.ibm.com/developerworks/library/os-cplfaq.html

    1. What is the relationship between the IBM(R) Public License (IPL)
       and the Common Public License (CPL)?

        The IPL was IBM's first open source license. The CPL is
        essentially the next version of the IPL.

the Postfix license states:

    IBM may publish new versions (including revisions) of this Agreement
    from time to time.  Each new version of the Agreement will be given a
    distinguishing version number.  The Program (including Contributions)
    may always be distributed subject to the version of the Agreement under
    which it was received. In addition, after a new version of the Agreement
    is published, Contributor may elect to distribute the Program (including
    its Contributions) under the new version.

so it is perhaps useful to understand whether the CPL is such a new
version, and whether Postfix may now be distributed under the CPL.

> I see that postfix on RHEL6 clearly links against mysql:

While the IPL is listed at:

    http://www.opensource.org/licenses/alphabetical

The MySQL FOSS exception, however, does not broadly include all OSI
licenses.

-- 
        Viktor.

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