How I managed to install kexc

[alemuller]

Don't waste your time with cabal (you did, didn't you?). Use stack as suggested in #9.

I installed stack with my distro's package manager.

I had some minor issues with stack (described bellow). To avoid them:

1. Make sure $PREFIX is set to some local directory.

export PREFIX=`${HOME}/.local/share`

2. Add this import declaration to src/KMC/Kleenex/Actions.hs.

import Data.Semigroup

Now, on the the directory ./kleenexlang, run:

stack setup
stack build
stack exec env # Not sure if this is needed

Then, to run kexc with stack:

stack exec kexc

The binary is installed in a hidden folder at ./kleenexlang/.stack-work/install/*/*/*/bin.

It it doesn't work, build again.

---

If you don't set $PREFIX, stack will try (and fail) to install at /usr/bin. Running sudo make install on the some exotic directory will install it. But this only causes more problem, stack will know it is installed, but will refuses to use (or to build again).

I had to delete ${HOME}/.stack/programs/x86_64-linux/ghc-tinfo6-8.0.1.installed for be able to try again (this time with $PREFIX).

If you don't add the import, the compilation will fail with this error:

[15 of 37] Compiling KMC.Kleenex.Actions ( src/KMC/Kleenex/Actions.hs, .stack-work/dist/x86_64-linux-tinfo6/Cabal-1.24.0.0/build/KMC/Kleenex/Actions.o )

src/KMC/Kleenex/Actions.hs:40:10: error:
    Not in scope: type constructor or class `Semigroup'