ghcup makes it easy to install specific versions of
ghc on GNU/Linux, and can also bootstrap a fresh Haskell developer environment from scratch.
It follows the unix UNIX philosophy of do one thing and do it well.
Table of Contents
Just place the
ghcup shell script into your
( mkdir -p ~/.ghcup/bin && curl https://raw.githubusercontent.com/haskell/ghcup/master/ghcup > ~/.ghcup/bin/ghcup && chmod +x ~/.ghcup/bin/ghcup) && echo "Success"
Then adjust your
~/.bashrc (or similar, depending on your shell) like so, for example:
Common use cases are:
# install the last known "best" GHC version ghcup install # install a specific GHC version ghcup install 8.2.2 # set the currently "active" GHC version ghcup set 8.4.4 # install cabal-install ghcup install-cabal # update cabal-install cabal new-install cabal-install
Installs a specified GHC version into
~/.ghcup/ghc/<ver>, and places
ghc-<ver> symlinks in
Optionally, an unversioned
ghc link can point to a default version of your choice.
This uses precompiled GHC binaries that have been compiled on fedora/debian by upstream GHC.
Alternatively, you can also tell it to compile from source (note that this might fail due to missing requirements).
In addition this script can also install
Limited distributions supported
Currently only GNU/Linux distributions compatible with the upstream GHC binaries are supported.
Since this uses precompiled binaries you may run into problems with ncurses and missing libtinfo, in case your distribution doesn't use the legacy way of building ncurses and has no compatibility symlinks in place.
Ask your distributor on how to solve this or
try to compile from source via
ghcup compile <version>.
Although this script can compile GHC for you, it's just a very thin wrapper around the build system. It makes no effort in trying to figure out whether you have the correct toolchain and the correct dependencies. Refer to the official docs on how to prepare your environment for building GHC.