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Questions tagged [cabal]

Cabal is a package distribution and build system for the Haskell programming language.

Cabal stands for Common Architecture for Building Applications and Libraries. It is a package distribution and build system for the Haskell programming language. It is integrated with Hackage, a central package archive of open-source software written in Haskell. Cabal can refer both to the Cabal library which Setup.hs files can link against in order to build Haskell packages, and the command-line tool, which provides a range of additional functionality, including automatically fetching packages from , solving dependency graphs of version constraints to obtain install plans, managing sandboxed package environments, and much more.

More information about Cabal can be found at the Cabal website.

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What is the difference between Cabal and Stack?

Yesterday I learnt about a new Haskell tool called Stack. At the first blush, it looks like it does much the same job as Cabal. So, what is the difference between them? Is stack a replacement for Cabal? In which cases should I use Stack instead of…
ZhekaKozlov
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Emacs Interactive-Haskell repl non-response if either the cabal or working directory set to project directory

I'm running into odd behavior with the Interactive-Haskell repl in emacs. When I source a file, the emacs mini buffer shows a series of interactive prompts: Start a new project named 'myproject'? Cabal dir (guessed from myproject.cabal): Build…
daj
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How can I uninstall a version of a Cabal package?

Happstack Lite is breaking on me because it's getting blaze-html version 0.5 and it wants version 0.4. Cabal says that both versions 0.4.3.4 and 0.5.0.0 are installed. I want to remove the 0.5.0.0 and use just the older version. But cabal does…
Norman Ramsey
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Profiling builds with Stack

How do I tell stack to build my executable and all its dependencies with -prof? Simply adding it to ghc-options in the .cabal file is not enough, because it only tries to build the executable with profiling enabled, which fails.
Sebastian Graf
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How can my Haskell program or library find its version number?

I would like my cabalised program to have a --version switch. I would like it to report the same version as is present in the .cabal file. If I have to update the version number separately in my Haskell source code as well as in the .cabal file, I…
dave4420
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How to install a package using stack?

Using cabal, I could install hakyll with the command: cabal install hakyll How can I do the same thing using stack?
Ben
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My cabal packages are FUBAR; how can I purge them and start over?

I forgot to enable building libs for profiling in my ~/.cabal/config before installing a bunch of packages on a new machine and now a --reinstall world to try to fix the situation has left everything broken (naturally). I think it's a better use of…
jberryman
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How to reduce duplication in the build-depends fields of a .cabal file?

Here's a .cabal file: Name: myprogram Version: 0.1 -- blah blah blah Cabal-version: >=1.9.2 Executable myprogram HS-source-dirs: src Main-is: Main.hs Build-depends: attoparsec ==…
dave4420
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How to make a Haskell cabal project with library+executables that still run with runhaskell/ghci?

If you declare a library + executable sections in a cabal file while avoiding double compilation of the library by putting the library into a hs-source-dirs directory, you cannot usually run your project with ghci and runhaskell anymore, especially…
nh2
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Independent subset of cabal packages set

Given a set of cabal packages, is there a way to automatically calculate subset of independent packages? In other words, subset of packages that will be sufficient to install them all. For [network,parsec] the answer is [network] because it network…
ДМИТРИЙ МАЛИКОВ
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How to use a DLL in a Haskell project?

I would like to use an external library, RDFox, in a Haskell project. Context: I am working on Windows and Linux, both 64 bits, using GHC 7.10 and stack. RDFox is programmed in C++. RDFox shared libraries (.dll, .so) can be downloaded with Java and…
Der Vogel
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Cabal not installing dependencies when needing profiling libraries?

I want to compile my program with profiling, so I run: $ cabal configure --enable-executable-profiling ... $ cabal build ... Could not find module 'Graphics.UI.GLUT': Perhaps you havent installed the profiling libraries for package…
yairchu
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How can I set up a simple test with Cabal?

I have a Haskell project and Cabal package-description that allows me to build and install my package with $ cabal configure $ cabal build $ cabal install But what about cabal test? Cabal's help says to configure a test suite with UserHooks, but how…
Greg Bacon
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Can I get `cabal install` to use multiple cores?

Does anyone know how to get cabal install to exploit parallelism? I'm compiling with GHC, and while I don't know if GHC itself can do parallel builds, surely cabal install could run multiple compilations in parallel, no? At least for distinct,…
Norman Ramsey
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How to install/use a local version of package using Stack?

The situation is, I am trying to install Netwire using Stack. However, there is a problem in the latest netwire 5.0.1, as reported by dhobbs: http://hub.darcs.net/ertes/netwire/issue/13 Since I don't know when the problem will ever be fixed, I…
Carl Dong
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