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| − | The Haskell Cabal |
+ | The Haskell Cabal: |
| + | :The '''C'''ommon '''A'''rchitecture for '''B'''uilding '''A'''pplications and '''L'''ibraries |
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| − | The Common Architecture for Building Applications and Libraries |
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http://www.haskell.org/cabal/ |
http://www.haskell.org/cabal/ |
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| + | == Summary == |
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| − | == Building Dlls on Windows with Cabal == |
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| + | * Cabal is a package and build system. Cabal is only involved in the creation of packages and the building of their contents. It does not manage packages. |
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| − | Cabal does not currently support building dlls on windows out of the box. Some details about why can be found here: |
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| + | * [[Cabal-Install]] installs cabal packages. It is distinct from Cabal (the build system). This often confuses new users. Furthermore, Cabal-Install is not a fully featured package manager. For example, it cannot install non cabal packaged dependencies, it cannot uninstall packages, nor can it automatically upgrade installations. |
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| − | http://www.haskell.org/ghc/docs/6.4.2/html/users_guide/packages.html |
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| − | http://www.haskell.org/ghc/docs/6.4.2/html/users_guide/win32-dlls.html |
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| + | == Information for package users == |
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| − | This means that we have to do a bit of hackery to get Cabal to build a dll from a library. As long as we build a single DLL from the entire project the dll should behave as expected. Using the Setup.lhs listed below and following the directions listed above (the second link) I was able to use Visual Haskell to build a dll which I could load into Visual Basic for testing. |
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| + | *[https://cabal.readthedocs.io/en/latest/index.html Cabal User Guide] |
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| − | The following Setup.lhs should do the trick for most projects which consist of a single library which needs to be built as a dll. If you need to specify a dll export file you'll need to modify the function <tt>cmd</tt> to take this into account. Another possible addition is specifying a static dll. Check the ghc manual above. |
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| + | *[http://dev.stephendiehl.com/hask/#cabal An introduction to cabal-install] |
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| + | *[[Cabal/FAQ|FAQ: Frequently Asked Questions]] |
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| + | *[[Cabal-Install]] - tool that greatly simplifies installation of Cabal packages |
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| + | *[http://hackage.haskell.org/package/cabal-sort Cabal-Sort] - assistance with compilation of multiple cabal packages |
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| + | *[http://hackage.haskell.org/ Hackage] - the Haskell community's public repository of cabal packages |
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| + | * Other [https://hackage.haskell.org/packages/search?terms=cabal cabal related packages on hackage] |
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| + | == Information for package developers == |
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| − | <haskell> |
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| + | *[[How to write a Haskell program]] |
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| − | #! /usr/bin/runghc |
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| + | *[https://wewantarock.wordpress.com/2010/11/03/building-a-shared-library-in-cabal/ Building a shared library in Cabal] |
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| − | |||
| + | *[[Upgrading packages]] |
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| − | > import Distribution.Simple |
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| + | *[[Package versioning policy]] |
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| − | > import Distribution.Simple.LocalBuildInfo |
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| + | *[http://neilmitchell.blogspot.com/2008/02/adding-data-files-using-cabal.html Adding data files using Cabal] |
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| − | > import Distribution.PackageDescription |
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| + | *[https://web.archive.org/web/20161108012154/www.moonloop.net/haskell/docs/cbs-custom.html Cabal Setup file examples] |
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| − | > import System.Cmd |
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| + | *[http://blog.ezyang.com/2010/06/setting-up-cabal-the-ffi-and-c2hs/ Setting up Cabal, the FFI and c2hs] |
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| − | > import System.Directory |
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| − | > import Data.List |
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| − | > |
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| − | > |
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| − | > main = defaultMainWithHooks (defaultUserHooks { postBuild = buildDll }) |
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| − | > where |
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| − | > buildDll _ _ pkg info = do putStrLn "Building Dll..." |
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| − | > setCurrentDirectory (buildDir info) |
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| − | > let buildCmd = cmd pkg info |
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| − | > putStrLn buildCmd |
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| − | > system buildCmd |
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| − | > let dll = dllFile pkg |
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| − | > let cpDllCmd = "cp " ++ dll ++ " " ++ (name pkg) ++ "\\" ++ dll |
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| − | > putStrLn cpDllCmd |
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| − | > system cpDllCmd |
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| − | > ghcExe :: LocalBuildInfo -> String |
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| − | > ghcExe info = "\"" ++ (compilerPath (compiler info)) ++ "\"" |
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| − | > mainOFile :: PackageDescription -> String |
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| − | > mainOFile pd = "HS" ++ (name pd) ++ "-" ++ (showVersion (pkgVersion (package pd))) ++ ".o" |
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| − | > cmd :: PackageDescription -> LocalBuildInfo -> String |
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| − | > cmd pd i = (ghcExe i) ++ " --mk-dll -o " ++ (dllFile pd) ++ " " ++ (mainOFile pd) ++ " " ++ (packages i) |
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| − | > packages :: LocalBuildInfo -> String |
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| − | > packages i = foldl1 (\x y -> x ++ " " ++ y) (map showPackage (packageDeps i)) |
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| − | > showPackage :: PackageIdentifier -> String |
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| − | > showPackage pi = "-package " ++ showPackageId pi |
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| − | > name :: PackageDescription -> String |
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| − | > name = pkgName . package |
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| − | > dllFile :: PackageDescription -> String |
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| − | > dllFile pd = (name pd) ++ ".dll" |
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| − | </haskell> |
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[[Category:Tools]] |
[[Category:Tools]] |
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| + | [[Category:Cabal]] |
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Latest revision as of 12:34, 2 October 2020
The Haskell Cabal:
- The Common Architecture for Building Applications and Libraries
Summary
- Cabal is a package and build system. Cabal is only involved in the creation of packages and the building of their contents. It does not manage packages.
- Cabal-Install installs cabal packages. It is distinct from Cabal (the build system). This often confuses new users. Furthermore, Cabal-Install is not a fully featured package manager. For example, it cannot install non cabal packaged dependencies, it cannot uninstall packages, nor can it automatically upgrade installations.
Information for package users
- Cabal User Guide
- An introduction to cabal-install
- FAQ: Frequently Asked Questions
- Cabal-Install - tool that greatly simplifies installation of Cabal packages
- Cabal-Sort - assistance with compilation of multiple cabal packages
- Hackage - the Haskell community's public repository of cabal packages
- Other cabal related packages on hackage