COMPILING_MACOS_M1.md

Compiling on macOS M1

Prerequisites

• brew

Install ghcup and llvm@12

$ brew install ghcup
$ brew install llvm@12

Setup environment to use llvm we installed earlier

export C_INCLUDE_PATH="`xcrun --show-sdk-path`/usr/include/ffi"
export CPPFLAGS="-I/opt/homebrew/opt/llvm@12/include"
export LDFLAGS="-L/opt/homebrew/opt/llvm@12/lib -Wl,-rpath,/opt/homebrew/opt/llvm@12/lib"

export PATH="$PATH:/opt/homebrew/opt/llvm@12/bin"

Install Haskell toolchain compatible with ghc 9.0.2

$ ghcup install ghc 9.0.2
$ ghcup set ghc 9.0.2
$ ghcup install stack recommended
$ ghcup set stack recommended
$ ghcup install cabal recommended
$ ghcup set cabal recommended
$ ghcup install hls 1.7.0.0
$ ghcup set hls 1.7.0.0

Setup stack to use only system libraries. Add this lines to ~/.stack/config.yml

install-ghc: false
system-ghc: true

Setup ghc to use llvm@12. Edit ~/.ghcup/ghc/9.0.2/lib/ghc-9.0.2/lib/settings, find line ,("C compiler command", "gcc") and substitute gcc with clang.

Compiling

$ stack build