How To Install ghc-strict on Fedora 36
Introduction
In this tutorial we learn how to install ghc-strict on Fedora 36.
What is ghc-strict
This package provides strict versions of some standard Haskell data types (pairs, Maybe and Either). It also contains strict IO operations. It is common knowledge that lazy datastructures can lead to space-leaks. This problem is particularly prominent, when using lazy datastructures to store the state of a long-running application in memory. One common solution to this problem is to use ‘seq’ and its variants in every piece of code that updates your state. However a much easier solution is to use fully strict types to store such state values. By “fully strict types” we mean types for whose values it holds that, if they are in weak-head normal form, then they are also in normal form. Intuitively, this means that values of fully strict types cannot contain unevaluated thunks. To define a fully strict datatype, one typically uses the following recipe. 1. Make all fields of every constructor strict; i.e., add a bang to all fields. 2. Use only strict types for the fields of the constructors. The second requirement is problematic as it rules out the use of the standard Haskell ‘Maybe’, ‘Either’, and pair types. This library solves this problem by providing strict variants of these types and their corresponding standard support functions and type-class instances. Note that this library does currently not provide fully strict lists. They can be added if they are really required. However, in many cases one probably wants to use unboxed or strict boxed vectors from the ‘vector’ library (<http Moreover, instead of ‘String’s one probably wants to use strict ‘Text’ values from the ’text’ library (<http This library comes with batteries included; i.e., mirror functions and instances of the lazy versions in ‘base’. It also includes instances for type-classes from the ‘deepseq’, ‘binary’, and ‘hashable’ packages.
We can use yum or dnf to install ghc-strict on Fedora 36. In this tutorial we discuss both methods but you only need to choose one of method to install ghc-strict.
Install ghc-strict on Fedora 36 Using dnf
Update yum database with dnf using the following command.
sudo dnf makecache --refresh
After updating yum database, We can install ghc-strict using dnf by running the following command:
sudo dnf -y install ghc-strict
Install ghc-strict on Fedora 36 Using yum
Update yum database with yum using the following command.
sudo yum makecache --refresh
After updating yum database, We can install ghc-strict using yum by running the following command:
sudo yum -y install ghc-strict
How To Uninstall ghc-strict on Fedora 36
To uninstall only the ghc-strict package we can use the following command:
sudo dnf remove ghc-strict
ghc-strict Package Contents on Fedora 36
/usr/lib/.build-id
/usr/lib/.build-id/11
/usr/lib/.build-id/11/995501055d39bcab4e27e7c3a4bf0d05c5f954
/usr/lib64/libHSstrict-0.4.0.1-1xFTAq4YhxX94NPQMMxjB-ghc8.10.5.so
/usr/share/licenses/ghc-strict
/usr/share/licenses/ghc-strict/LICENSE
References
Summary
In this tutorial we learn how to install ghc-strict on Fedora 36 using yum and [dnf]((/fedora/36/dnf/).