Changelog: add another migration example #23

	name: emulated
	on:
	- push
	- pull_request

	defaults:
	run:
	shell: bash

	jobs:
	# Emulation is incredibly slow and memory demanding. It seems that any
	# executable with GHC RTS takes at least 7-8 Gb of RAM, so we can run
	# `cabal` or `ghc` on their own, but cannot run them both at the same time,
	# striking out `cabal test`. Instead we rely on system packages and invoke
	# `ghc --make` manually, and even so `ghc -O` is prohibitively expensive.
	emulated:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: true
	matrix:
	arch: ['s390x', 'ppc64le']
	steps:
	- uses: actions/checkout@v3
	- uses: uraimo/[email protected]
	timeout-minutes: 60
	with:
	arch: ${{ matrix.arch }}
	distro: ubuntu_rolling
	githubToken: ${{ github.token }}
	install: \|
	apt-get update -y
	apt-get install -y curl ghc libghc-tasty-quickcheck-dev libghc-file-embed-dev libghc-temporary-dev
	run: \|
	find Codec -iname '*.hs' -type f -exec sed -i.bck 's/"os-string"//g' {} \;
	curl -s https://hackage.haskell.org/package/os-string-2.0.3/os-string-2.0.3.tar.gz \| tar xz
	ghc --version
	ghc --make -itest:os-string-2.0.3 -o Main test/Properties.hs +RTS -s
	./Main +RTS -s

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