I think I read somewhere that if you modify the source of a software enough, you become the owner ("author") of that source.
First I'd like to make sure that this is correct. If not, then the point is moot.
If it is possible, then I'm wondering how many such changes are required to indeed switch the ownership of the new work to a new author.
In my case, the main code is pretty much the same, however, it now includes many more error checks. My problem is that this very small small part of the code which is licensed under the GPLv2 and used in a library which I would like to make LGPLv2 compatible.
If that helps, the original code is pretty old (1990-1997 and a few more changes in 1999), but I guess that copyrights hold for 70 years, at least in the Western World...
The current code in question is on github (there is also a .h) The older version in the zipios project is available on Sourceforge.net in a CVS repository (the tarball under Files is already an updated version.)