On Wed, 2011-02-09 at 03:47 +1300, Vivian McPhail wrote:
license: Foo, Bar
Could this be computed automatically from the source files by Cabal?
I would not want to rely on that.
Looking specifically at hmatrix, there are three kinds of modules
i) bindings to GSL GPL ii) bindings to LAPACK BSD iii) pure Haskell hmatrix author's choice
1) Am I correct in thinking that even the bindings modules (the Haskell parts, not the C files) can be under any licence, FOO, chosen by the author, but the binary _linked_ to, say, GSL has to comply with FOO and GPL?
Yes. Code you write can be under any license you like. When someone uses the combination then they have to comply with all the licenses (so implicitly there's the constraint that the license you pick must be compatible with the license of the other parts).
2) If someone uses hmatrix but no GSL functions (hence there are no GSL functions in the linked binary) can they get away with not complying with the GSL requirement?
Not sure. In practice I don't think you can achieve that with our toolchain. Duncan