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@@ -25,6 +25,29 @@ books that were more suitable for beginners. Now I returned and I'm going to see how much difference it has made and whether I will be able to continue in the exercises. +## Running the code on new systems + +The book was published in 2008. Even though it's old, most of the code can still +be compiled with recent versions of GHC without any change. Only a few parts +required minor modifications or additions. These are described in the comments +in the source files of the exercise solutions. + +Where more work was needed, I wanted to keep the code in its original form as +much as possible instead of rewriting it for new GHC or libraries. These cases +are described here. + +### Chapter 23: GUI programming + +This chapter uses more libraries than the other chapters and I was not able to +install all of them using recent `stack` resolvers (sets of GHC and specific +package versions) and `Cabal` versions. + +I decided to create a reproducible environment consisting of an older GHC and +compatible versions of the required libraries. Eventually, I was able to compile +and run the application. + +See the [README](ch23/support/README.md) in the [ch23/support](ch23/support) directory. + ## Exercises There are a few kinds of exercises: |