On 21 November 2011 17:34, Brandon Allbery
Haddock carries the same license as GHC.
More to the point, Haddock uses ghc internals these days; it's not just a matter of bundling, and the licenses *must* be compatible.
No. If the haddock library any program that links against that library (e.g., the haddock program) effectively becomes GPL licensed (roughly speaking). However, ghc and none of the core libraries link against haddock, so that's not a problem. You could run into issues if you wanted to write a closed-source program that links against the haddock library. I generally don't like GPL-licensed libraries for that reason, but in this case I think it would be fine. (Of course, the issue is that many tools start out as programs and then turn into libraries -- pandoc is a good example. At that point GPL becomes an issue again.) -- Push the envelope. Watch it bend.