Tag: Haskell

# pacman -S stack
resolving dependencies...
looking for conflicting packages...
......

At the end of installation, it prompts following words:

You need to either 1) install latest stable ghc package from [extra] or 2) install ncurses5compat-libs from AUR for the prebuilt binaries installed by stack to work.

So install ghc further:

# pacman -S ghc
resolving dependencies...
looking for conflicting packages...

Now that the environment is ready, you should modify your own ~/.stack/config.yaml file:

# This file contains default non-project-specific settings for 'stack', used
# in all projects.  For more information about stack's configuration, see
# http://docs.haskellstack.org/en/stable/yaml_configuration/

# The following parameters are used by "stack new" to automatically fill fields
# in the cabal config. We recommend uncommenting them and filling them out if
# you intend to use 'stack new'.
# See https://docs.haskellstack.org/en/stable/yaml_configuration/#templates
templates:
  params:
#    author-name:
#    author-email:
#    copyright:
#    github-username:

For example, add name, email etc.

Then follow this link to create a simple program:

# stack new hello
# cd hello
# stack setup
# stack build
# stack exec hello-exe

You will see “someFunc” is outputted.

BTW, you can also use ghc compiler directly. E.g., write a “Hello world” program (Reference is here):

# cat hello.hs
main :: IO ()
main = putStrLn "Hello World!"
# ghc -dynamic hello.hs
# ./hello
Hello World!

That’s all!