On Tue, Jan 25, 2011 at 22:20, Chris Smith
On Tue, 2011-01-25 at 21:48 -0800, John Millikin wrote:
Please cite where the FSF claims the GPL applies to unrelated works just because they can compile against GPL'd code. Keep in mind that if your claim is correct, then every significant Linux and BSD distro is committing massive copyright infringement.
I'm not sure what you're doing here. You yourself just wrote in another email: "If you create a derivative work of BSD3 and GPL code (eg, a binary), it's covered by both the BSD3 and GPL." In practice, since the BSD3 contains no terms that aren't also contained in the GPL, that means it's covered by the GPL.
The specific claim I'm refuting is that if some library or application depends on GPL'd code, that library/application must itself be GPL-licensed. This claim is simply not true. The GPL only applies to derived works, such as binaries or copied code.
If you're actually confused, I'd be happy to compose a longer response with more details. But since you've just said yourself the same thing I was saying, I feel rather as though running off to collect quotations from the FSF web site would be a wild goose chase and not much worth the time. What part of this do you think needs support? Is it the definition of "derived work" to include linking? Something else?
I think you're getting mixed up between a derived work and dependent library/application. Using the following code as a guide, the library "hmatrix" is BSD3, the dependent library "matrixTools" is X11, the dependent application "matrixCalc" is BSD3, and the derived work ("binary") is all three. Just because some of the packages depend on a GPL'd library, doesn't mean *they* are GPL'd. They can be under whatever license the creator wants them to be. -------------------------------------------------------------------------------- import Data.List data License = GPL | BSD3 | X11 | PublicDomain deriving (Show, Eq) data Library = Library String License [Library] -- name, license, deps deriving (Show, Eq) data Application = Application String License [Library] -- name, license, deps deriving (Show, Eq) data Binary = Binary String [License] -- name, licenses deriving (Show, Eq) compile :: Application -> Binary compile (Application name license deps) = Binary ("bin-" ++ name) allLicenses where allLicenses = nub (license : concatMap libLicenses deps) libLicenses (Library _ l libdeps) = l : concatMap libLicenses libdeps main = do let base = Library "base" BSD3 [] -- hmatrix depends on base hmatrix = Library "hmatrix" GPL [base] -- matrixTools depends on hmatrix matrixTools = Library "matrix-tools" X11 [hmatrix] -- matrixCalc depends on base, hmatrix, and matrixTools matrixCalc = Application "matrix-calc" BSD3 [matrixTools, hmatrix, base] -- the compiled binary is a derived work of all four binary = compile matrixCalc print binary --------------------------------------------------------------------------------