Bootstrap fails on macOS 11 with `can't load framework: Cocoa (not found)`

[essandess]

I've implemented the macOS 11 workaround in #5456 and yairchu/macos11-haskell-workaround, but have hit this issue building stack itself.

This uses the MacPorts stack port, itself based on stack's own build instructions, and is confirm to work on macOS 10.15 and previous.

:info:build Linking /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_stack/stack/work/stack-2.5.1/.stack-work/dist/x86_64-osx/Cabal-2.4.0.1/setup/setup ...
:info:build Configuring stack-2.5.1...
:info:build stack                 > build (lib + exe)
:info:build Preprocessing library for stack-2.5.1..
:info:build Building library for stack-2.5.1..
:info:build [  1 of 109] Compiling Network.HTTP.StackClient
:info:build [  2 of 109] Compiling Path.Extended
…
:info:build [ 39 of 109] Compiling System.Permissions
:info:build [ 40 of 109] Compiling Stack.Constants
:info:build <command line>: can't load framework: Cocoa (not found)
:info:build Completed 161 action(s).
:info:build --  While building package stack-2.5.1 (scroll up to its section to see the error) using:
:info:build       /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_stack/stack/work/stack-2.5.1/.stack-work/dist/x86_64-osx/Cabal-2.4.0.1/setup/setup --builddir=.stack-work/dist/x86_64-osx/Cabal-2.4.0.1 build lib:stack exe:stack --ghc-options ""
:info:build     Process exited with code: ExitFailure 1
:info:build Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_stack/stack/work/stack-2.5.1" && /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_stack/stack/work/bin/stack build --with-gcc /usr/bin/clang --allow-different-user 
:info:build Exit code: 1

[WillSewell]

This happens for me when I run stack upgrade --git.

According to https://gitlab.haskell.org/ghc/ghc/-/merge_requests/3689#note_328885, it should be fixed for newer version of GHC.

I think I'm using GHC 8.10.4, so I'm not sure what this issue is...

$ stack ghc -- --version
The Glorious Glasgow Haskell Compilation System, version 8.10.4

[essandess]

Also exhibited on rc/v2.7.0.1: #5516 (comment)