I have downloaded the cabal-install-1.20.0.1.tar.gz directory. But am unsure what to do with it? Opening it up there is just a bunch of files, there is no installer etc. I found an old guide but it is from 2011 and is now obsolete, any help?
How you install Cabal depends on how your system is set up. Cabal definitely requires a working compiler to install. So you have a few options, and some of them are more preferred than others:
If you don't have a compiler, get GHC and the Haskell Platform. The Haskell Platform is a collection of important and useful libraries for Haskell. The Haskell Platform is the "batteries included" distribution -- this is the one you want if you want your Haskell system to "just work."
If you already have a compiler, but you don't have Cabal, you can install Cabal by running the bootstrap.sh script in the tar file you downloaded. You can also do it by running:
runhaskell Setup configure --user
runhaskell Setup build
runhaskell Setup install
inside the cabal-1.20 directory. Notice that I passed in a --user flag. This lets you install Cabal just for your user. If you are unable to install to the system, you will want to use this last option.
I am not actually sure that Cabal 1.20 will install with a compiler as old as GHC-7.4.1. If it doesn't work, you can actually get GHC-7.6.3 (or even 7.8) installed in your user directory. The GHC binary linux installer uses the configure/make/install system, so you can pass in a --prefix. If you go this route, I would advise using your new GHC to build the Haskell Platform (which also accepts a --prefix option). So doing that would look something like:
<download ghc-7.6.3 tar file from http://www.haskell.org/ghc/download_ghc_7_6_3#x86linux>
<untar the ghc tar file>
$ cd <the ghc directory>
$ ./configure --prefix=$HOME
$ make install
$ cd ..
<download haskell platform source from http://www.haskell.org/platform/download/2013.2.0.0/haskell-platform-2013.2.0.0.tar.gz>
<untar the haskell platform tar file>
$ cd <the haskell-platform directory>
$ ./configure --prefix=$HOME
$ make
$ make install
And then you would have to edit your path so that "$HOME/bin/" comes before "/bin"
There should be a file named bootstrap.sh in the tarball. Run it to install cabal-install.
Related
I am using ghc-7.6.3 with cabal-install version 1.18.0.5 using version 1.18.1.3 of the Cabal library. My operating system is Debian Wheezy 7.5.
I have a fresh cabal install, and that I have removed the .ghc from my home directory.
After that I have changed the cabal config file and set:
remote-repo: stackage-nightly-2014-12-15:http://www.stackage.org/snapshot/nightly-2014-12-15
After that I did (following this documentation)
$ cabal update
$ cabal install alex happy yesod-bin
and the build complained that it cannot build package system-filepath-0.4.12.
So, I am trying to build package system-filepath-0.4.12 manually. After unpacking the archive, I cd-ed to the unpacked folder and entered:
$ ghc -o Setup Setup.hs
$ ./Setup configure
which gives:
Configuring system-filepath-0.4.12...
Setup: At least the following dependencies are missing:
text >=0.7.1
But
$ cabal install text
gives:
Resolving dependencies...
All the requested packages are already installed:
text-1.1.1.3
Use --reinstall if you want to reinstall anyway.
How is it possible that a package is reported as installed and missing at the same time?
Should I look for a more stable remote-repo configuration, is there something I can check that might fix the missing text package? Note that I am not using a sandbox.
EDIT
Thanks for pointing out that there are two package databases.
I have now tried both
$ cabal configure
$ cabal build
and
$ Setup configure --user
$ Setup build
Both give no error during configuration, but give the following error during the build phase:
Building system-filepath-0.4.12...
Preprocessing library system-filepath-0.4.12...
/usr/bin/ld: cannot find -lHStext-1.1.1.3-ghc7.8.3
collect2: error: ld returned 1 exit status
Try this instead
cd system-filepath--0.4.12
cabal configure
I am not sure why, but this works for me, whereas Setup.hs gave me the same error (truth be told, I always do it the cabal configure way, and am not sure if your way should also work).
There are (at least) two package databases: a global one available to all users, and a user-specific one. By default, Setup.hs looks in (and installs to) the global one, and cabal-install looks in (and installs to) the user-specific one. You can manually choose one or the other with --user and --global; so, you could fix this either by using
./Setup configure --user
or by
cabal install text --global
You can see the current state of the package databases with ghc-pkg, which will report information about both by default.
I built llvm 3.0, downloaded from here. I did:
./configure CC=gcc CXX=g++ --enable-shared
sudo make -j5 -s install
Next, I cloned the LLVM bindings from here. I am trying:
runhaskell Setup configure
But I get:
Configuring llvm-3.0.0.0...
Setup.lhs: At least the following dependencies are missing:
llvm-base ==3.0.*, type-level -any
I am running Linux Mint 64-bit (equivalent to Ubuntu 11.0). GHC is 6.12.3. I tried a cabal install but apparently the llvm version is too old to run some examples (am I mistaken?).
What am I doing wrong?
Bryan recently split the llvm package in two, that split has not yet made it to hackage. So if you don't want to simply cabal install the hackage version,
install the type-level package (cabal install should work fine)
cd into the base subdirectory of the llvm-repo, install llvm-base
cd into the llvm directory, install
I have not tried it, so it might not work, but usually Bryan's repos are buildable, so there's a good chance that it does.
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 'GLUT-2.2.2.0'?
...
$ # indeed I have not installed the prof libs for GLUT, so..
$ cabal install -p GLUT --reinstall
...
Could not find module 'Graphics.Rendering.OpenGL':
Perhaps you havent installed the profiling libraries for package 'OpenGL-2.4.0.1'?
...
So, the problem is, that unlike cabal's usual welcome behavior, cabal doesn't resolve the dependencies and install them when needing profiling libraries.
I can work around it by resolving the dependencies manually (by following errors that appear after a while of compiling):
$ cabal install -p OpenGLRaw --reinstall
$ cabal install -p StateVar --reinstall
$ cabal install -p Tensor --reinstall
$ cabal install -p ObjectName --reinstall
$ cabal install -p GLURaw --reinstall
$ cabal install -p OpenGL --reinstall
$ cabal install -p GLUT --reinstall
And then repeat for my next dependency..
Is there a better way to do this? i.e do make cabal do the work on its own as it does for normal libraries?
I've enabled library-profiling: True in my ~/.cabal/config file. From then on, any new installations will automatically enable profiling.
Unfortunately that still means I had to manually reinstall for the old packages already installed. Although, after a while of doing this manually, I now have most packages reinstalled with profiling enabled...
From a comment by Tom Lokhorst:
I do hope someone will come along with a better answer, one that would not require me to reinstall the complete Haskell Platform manually next time.
For future visitors:
The task of installing profiling versions of all installed libraries has become less of a chore, cabal (cabal-install) now keeps track of what was installed using it in the world file in the .cabal directory (on linux, that would be $HOME/.cabal, on Windows something like C:\Users\%YOU%\AppData\Roaming\cabal\, on OSX ??).
So after enabling profiling in the config file (in the same directory), and clearing GHC's package database (you can find the locations of the global and user db per ghc-pkg list nonexisting; remove the cabal-installed packages from the global database with ghc-pkg unregister packagename if you have any, rename or delete the entire user db - this is necessary because the world file only tracks explicitly installed packages, not their dependencies), installing everything with profiling support should work as follows:
$ cabal install --reinstall world --dry-run
First run with --dry-run to check for problems before actually reinstalling anything. If it would reinstall boot packages like process or directory, that's a bad sign, if you don't know how to handle it, ask on the #haskell IRC channel, one of the mailing lists, or here for guidance. If it fails to find a consistent install plan due to new versions on hackage of some packages which are incompatible with each other, that can usually be solved by editing the world file and constraining allowable versions of some packages.
Then, if you are optimistic that nothing will badly break,
$ cabal install --reinstall world
and have a nice pot of tea while GHC is busy compiling.
Daniel Fischer's answer looks good, but for some reason my ~/.cabal/world library only contained entries for libraries directly installed, and not their dependencies.
Instead, I dumped out a list of all installed libraries using
$ ghc-pkg list > list
This lists the libraries installed system-wide and locally. Therefore, I edited the list file to remove the first portion (containing libraries installed system-wide) leaving only the lines after /home/<user>/.ghc/.... Finally, I ran
$ cabal install --reinstall $(cat list)
This worked for me. You should maybe do --dry-run first. Then go make a pot of tea. Or bake a cake.
it appears there is no way right now: Ticket #282 - profiling versions of libraries not managed well "As usual the problem is lack of devevloper time to implement all these
nice features we all want."
For visitors 2016+: Just install ghc-prof
Debian Linux Systems:
sudo apt-get install ghc-prof
Arch Linux Systems:
sudo pacman -S ghc-prof
I'm trying to set up Haskell from scratch, on Ubuntu 11.04, without using the outdated Debian repository or Haskell-Platform.
I've installed GHC-7.0.4 from source with no problem, and now need to install Cabal (which appears to already be included in GHC in /usr/local/lib/ghc-7.0.4/Cabal-1.10.2.0) and Cabal Install.
The latter specifies several dependencies (parsec and network), each of which has several dependencies of their own (mtl, text, etc).
What's the command to install these packages, that I downloaded from hackage in tar.gz form?
Unpack, then runhaskell doesn't work.
I see Setup.lhs, but it's not clear what that's for or how to use it.
Most of the Haskell documentation I've found assumes you've installed from a repo or Haskell-Package and doesn't really explain this well.
cabal-install has a shell script that does this. If you download it from hackage and install it, you can start bootstrap.sh to install cabal-install. You can then use it to install other packages.
There are two different packages: Cabal and cabal-install. Cabal is a library, and cabal-install is an executable named cabal.
To install a package, cabal-install is an optional convenience wrapper around Cabal, but Cabal is required.
According to http://hackage.haskell.org/trac/ghc/wiki/Commentary/Libraries , Cabal is a 'zero-boot' package, so when you build GHC, Cabal and its dependencies are built for you automatically.
You can use ghc-pkg executable to check which packages are already installed:
# ghc-pkg list
Check if Cabal is in the list after you build GHC. If yes, you can install more packages without cabal-install using this documentation:
http://haskell.org/haskellwiki/Cabal/How_to_install_a_Cabal_package
I suggest you to install cabal-install first, and then install everything else using cabal-install executable. A usual commandine for global installation is this:
# runhaskell Setup configure
# runhaskell Setup build
# sudo runhaskell Setup install
Unpack a package tarball and run the commands in the folder with Setup.hs or Setup.lhs files. Note that a per-user non-root installation is also supported - Use runhaskell Setup configure --user
When you install cabal executable and its dependencies this way, use cabal install {package-name} to install more packages.
Note that Haskell Platform exists mostly because of the pain of installing cabal-install by yourself.
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 'GLUT-2.2.2.0'?
...
$ # indeed I have not installed the prof libs for GLUT, so..
$ cabal install -p GLUT --reinstall
...
Could not find module 'Graphics.Rendering.OpenGL':
Perhaps you havent installed the profiling libraries for package 'OpenGL-2.4.0.1'?
...
So, the problem is, that unlike cabal's usual welcome behavior, cabal doesn't resolve the dependencies and install them when needing profiling libraries.
I can work around it by resolving the dependencies manually (by following errors that appear after a while of compiling):
$ cabal install -p OpenGLRaw --reinstall
$ cabal install -p StateVar --reinstall
$ cabal install -p Tensor --reinstall
$ cabal install -p ObjectName --reinstall
$ cabal install -p GLURaw --reinstall
$ cabal install -p OpenGL --reinstall
$ cabal install -p GLUT --reinstall
And then repeat for my next dependency..
Is there a better way to do this? i.e do make cabal do the work on its own as it does for normal libraries?
I've enabled library-profiling: True in my ~/.cabal/config file. From then on, any new installations will automatically enable profiling.
Unfortunately that still means I had to manually reinstall for the old packages already installed. Although, after a while of doing this manually, I now have most packages reinstalled with profiling enabled...
From a comment by Tom Lokhorst:
I do hope someone will come along with a better answer, one that would not require me to reinstall the complete Haskell Platform manually next time.
For future visitors:
The task of installing profiling versions of all installed libraries has become less of a chore, cabal (cabal-install) now keeps track of what was installed using it in the world file in the .cabal directory (on linux, that would be $HOME/.cabal, on Windows something like C:\Users\%YOU%\AppData\Roaming\cabal\, on OSX ??).
So after enabling profiling in the config file (in the same directory), and clearing GHC's package database (you can find the locations of the global and user db per ghc-pkg list nonexisting; remove the cabal-installed packages from the global database with ghc-pkg unregister packagename if you have any, rename or delete the entire user db - this is necessary because the world file only tracks explicitly installed packages, not their dependencies), installing everything with profiling support should work as follows:
$ cabal install --reinstall world --dry-run
First run with --dry-run to check for problems before actually reinstalling anything. If it would reinstall boot packages like process or directory, that's a bad sign, if you don't know how to handle it, ask on the #haskell IRC channel, one of the mailing lists, or here for guidance. If it fails to find a consistent install plan due to new versions on hackage of some packages which are incompatible with each other, that can usually be solved by editing the world file and constraining allowable versions of some packages.
Then, if you are optimistic that nothing will badly break,
$ cabal install --reinstall world
and have a nice pot of tea while GHC is busy compiling.
Daniel Fischer's answer looks good, but for some reason my ~/.cabal/world library only contained entries for libraries directly installed, and not their dependencies.
Instead, I dumped out a list of all installed libraries using
$ ghc-pkg list > list
This lists the libraries installed system-wide and locally. Therefore, I edited the list file to remove the first portion (containing libraries installed system-wide) leaving only the lines after /home/<user>/.ghc/.... Finally, I ran
$ cabal install --reinstall $(cat list)
This worked for me. You should maybe do --dry-run first. Then go make a pot of tea. Or bake a cake.
it appears there is no way right now: Ticket #282 - profiling versions of libraries not managed well "As usual the problem is lack of devevloper time to implement all these
nice features we all want."
For visitors 2016+: Just install ghc-prof
Debian Linux Systems:
sudo apt-get install ghc-prof
Arch Linux Systems:
sudo pacman -S ghc-prof