Meta-Level Compilation project / Introspector/ AST access / Licensing question

[Richard Kenner]

    Well, only sort of oversimplifying.  No one has ever presented a reason
    that distributing a patch which causes GCC to dump its AST in any
    format (or distributing a patched GCC and source!) in any way violates
    the copyright.

Correct.  It's the *use* of such a file by a proprietary program that raises
the interesting copyright issue.