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From "Ryan Blue (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LEGAL-224) Can Apache projects use Doxygen-generated config files?
Date Fri, 04 Sep 2015 17:44:48 GMT

    [ https://issues.apache.org/jira/browse/LEGAL-224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14731139#comment-14731139

Ryan Blue commented on LEGAL-224:

[~bayard], it looks like it is probably generated by Doxygen. The ["Getting Started" guide|https://www.stack.nl/~dimitri/doxygen/manual/starting.html#step1]
gives a command to generate a config file to start with, which is probably how the file was
originally created. I think it is safe to assume that this is a doxygen-generated file, but
in that case doxygen considers it a derivative work of the input used in its production --
which is actually the config.xml that I linked to above.

It sounds like that clause is stating that building documentation with doxygen doesn't make
the output GPL; it is a derivative work of the input file (just as using gcc doesn't change
the license of a compiled program). But in this case, the output is generated from a GPL input
file. If that were a project-specific source file then it would be clear that the output is
not GPL, but since it is a derivative work of a GPL-licensed file does that exclusion still

> Can Apache projects use Doxygen-generated config files?
> -------------------------------------------------------
>                 Key: LEGAL-224
>                 URL: https://issues.apache.org/jira/browse/LEGAL-224
>             Project: Legal Discuss
>          Issue Type: Task
>            Reporter: Ryan Blue
> Avro uses Doxygen to generate C# and C++ documentation. Doxygen is configured by [a "Doxyfile"|https://github.com/apache/avro/blob/trunk/lang/c++/Doxyfile]
that appears to have been generated from [a GPL licensed doc within Doxygen|https://github.com/doxygen/doxygen/blob/master/src/config.xml]
and then changed for the needs of the project. Can Avro use this Doxyfile, or should the project
create a new Doxyfile with only the configuration options it needs and none of the comments
from the configuration template?
> I should also note that while the source file has a GPL license header, the Doxyfile
does not.
> Several other projects appear to use a similar Doxyfile, like [ORC|https://github.com/apache/orc/blob/master/c%2B%2B/Doxyfile]
and [Celix|https://github.com/apache/celix/blob/master/Doxyfile.in].

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