How can I make Cabal search for external programs?

Posted by Chris Stucchio on Stack Overflow See other posts from Stack Overflow or by Chris Stucchio
Published on 2010-04-17T22:27:19Z Indexed on 2010/04/17 22:33 UTC
Read the original article Hit count: 309

Filed under:

haskell

|

cabal

I'm trying to write a Haskell program which requires the output of external programs (such as lame, the mp3 encoder). While declaring dependency on a library is easy in cabal, how can one declare dependency on an executable?

© Stack Overflow or respective owner

Related posts about haskell

Learning Haskell: How to remove an item from a List in Haskell

as seen on Stack Overflow - Search for 'Stack Overflow'
Trying to learn Haskell. I am trying to write a simple function to remove a number from a list without using built-in function (delete...I think). For the sake of simplicity, let's assume that the input parameter is an Integer and the list is an Integer list. Here is the code I have, Please tell me… >>> More
Using Data.Heap in Haskell, or reading Haskell docs for a beginner

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to use Haskells Data.Heap module, but I'm incapable of even using it with integers. The only heap I've been capable of using is "empty", which does not take any arguments. Later on I'll figure out how to instance for my needs, but for now I'd be glad if I was even able to test it with… >>> More
What kind of things are easy in Haskell and hard in Scala, and vice versa?

as seen on Programmers - Search for 'Programmers'
There has been some intermingling of Scala and Haskell communities, and I have noticed now and then people commenting on stuff that's supposed to be easy in Haskell and hard and Scala. Less often (maybe because I read Scala questions, not Haskell ones), I see someone mentioning that something in Scala… >>> More
Haskell's cabal dependency problem with happy

as seen on Programmers - Search for 'Programmers'
I have problems installing ghc-mod on my linux machine. cabal worries about "happy" not being available in versione = 1.17: $ cabal install ghc-mod Resolving dependencies... [1 of 1] Compiling Main ( /tmp/haskell-src-exts-1.14.0-1357/haskell-src-exts-1.14.0/Setup.hs, /tmp/haskell-src-exts-1… >>> More
Understanding Haskell's fibonacci

as seen on Stack Overflow - Search for 'Stack Overflow'
fibs :: [Int] fibs = 0 : 1 : [ a + b | (a, b) <- zip fibs (tail fibs)] This generates the Fibonacci sequence. I understand the behaviour of the guards, of :, zip and tail, but I don't understand <-. What is it doing here? >>> More

Related posts about cabal

Cabal: Odd Error Message + Lack of Documentation

as seen on Stack Overflow - Search for 'Stack Overflow'
So I recently installed cabal (from the default binary of ArchLinux). I then tried to upgrade cabal as a user: cabal upgrade Cabal --user --prefix=$USER Resolving dependencies... cabal: fromFlag NoFlag. Use fromFlagOrDefault What I've already done: Googled the error message. Turned up… >>> More
Enable --hyperlink-source for "cabal install"

as seen on Stack Overflow - Search for 'Stack Overflow'
The command cabal haddock has very useful --hyperlink-source option. I would like to have the source hyperlinked when building documentation with cabal install. The ticket #517 seems to be just about it: http://hackage.haskell.org/trac/hackage/ticket/517 However, perhaps it is possible to set this… >>> More
Enable --hyperling-source for "cabal install"

as seen on Stack Overflow - Search for 'Stack Overflow'
The command cabal haddock has very useful --hyperlink-source option. I would like to have the source hyperlinked when building documentation with cabal install. The ticket #517 seems to be just about it: http://hackage.haskell.org/trac/hackage/ticket/517 However, perhaps it is possible to set this… >>> More
What is a good method to solve cabal install problems?

as seen on Super User - Search for 'Super User'
I've used the cabal package manager for Haskell programs to install libraries and new projects that I've cloned from some repositories. More often than not, I keep running into problems. Most projects make installing them seem super easy, but in my case that's not always true - sometimes they are… >>> More
C compiler selection in cabal package

as seen on Stack Overflow - Search for 'Stack Overflow'
Today I've tried C compiler (Clang) for C code I use in my haskell library and found that I can gain speed increase in comparsing with my system compiler (GCC 4.4.3) from 426.404 Gbit/s to 0.823 Tbit/s So I decided to add some flags to control the way that C source file is compiled (i.e. something… >>> More