Also, VCG 1.30 (the obfuscated source) contains code which is Copyright Bob Corbett and Richard Stallman and which is licensed under the GPL version 1 or later[2]. Because the code is (at least with the default makefile) copied into the executable, you must distribute *the entire work* under the terms of the GPL version 1 or later. Failing to do so violates Mr. Corbett's and Mr. Stallman's copyright.
Just a minor point: You suggest that distributing it under GPL 2, or "GPL 2 or later", would be a copyright violation. I do not think that this is the case. The choice of license is for the user. If the user decides to accept only GPL 2, and no other version, then she may redistribute it under that version. This is not actually related to acceptance of other versions by the user, but in case of limited acceptance it is clear that the user may not even release it under a different version, as the license must be accepted to allow redistribution.
Thanks, Bas
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