#89: Sharing of object files between executable builds? ---------------------------------+------------------------------------------ Reporter: bjorn@bringert.net | Owner: blackh Type: enhancement | Status: assigned Priority: normal | Milestone: Cabal-1.8 Component: Cabal library | Version: Severity: normal | Resolution: Keywords: | Difficulty: normal Ghcversion: 6.4.2 | Platform: Linux ---------------------------------+------------------------------------------ Changes (by blackh): * status: new => assigned * owner: => blackh Comment: maltem, the work on ticket 89 is completed and checked except for some minor bits that are not quite finished. However, the error message is telling lies. The minimum version for the ticket 89 feature to be activated is actually 1.7.1. (I assume the reason for this little porkie is that Duncan is intending 1.8 to be the version when it is released.) So, to test it, use: cabal-version: >= 1.7.1 Another point is that GHC will always look in the build directory in preference to using a library, so if you want to make it treat your internally defined library just like an external one (and therefore build each source file only one), you have to use hs-source-dirs: programs or similar on either your library or executable definition or both with different directory names, to keep the source files separate. There's an example of this in cabal/tests/PackageTests/BuildDeps/InternalLibrary1 - Stephen Blackheath -- Ticket URL: http://hackage.haskell.org/trac/hackage/ticket/89#comment:16 Hackage http://haskell.org/cabal/ Hackage: Cabal and related projects