Providing a non-free alternative to a free package

[debian-devel@liska.ath.cx (Olе Streicher)]

Hi,

the library I am working on in the moment (slalib,
<http://bugs.debian.org/659003>) is an quite old Fortran library with a
C interface and some (performance) drawbacks. This library is GPL and
meets the DFSG guidelines.

There is another version of this library available, where the (C)
sources are available (and put under GPL), but obfuscated, so that they
cannot go into "main" but would have to go into "non-free". However, I
am thinking about packaging this version as well.

However, there would be a conflict for the library names. How would one
solve this?

Best

Ole