I'm using MacOS Mojave. I want to use gcc-arm-none-eabi for ergodox, but I cannot install it with brew.
vikke@kosanji:~/vcswork/qmk_firmware[master]$ brew search gcc-arm-none-eabiNo formula or cask found for "gcc-arm-none-eabi".Closed pull requests:gcc-arm-none-eabi 8-2019-q3-update (new formula) (https://github.com/Homebrew/homebrew-core/pull/45780)gcc-arm-embedded 9-2019-q4-major (new formula) (https://github.com/Homebrew/homebrew-core/pull/46584)WIP: arm-none-eabi-gcc 8-2018-q4-major (new formula) (https://github.com/Homebrew/homebrew-core/pull/39869)libelf: remove libelf and dependents (https://github.com/Homebrew/homebrew-core/pull/39871)libelf 0.8.12 (downgrade to solve linkrot) (https://github.com/Homebrew/homebrew-core/pull/39910)Revert "Update gcc-arm-embedded to 6-2017-q1" (https://github.com/Homebrew/homebrew-cask/pull/30433)Update gcc-arm-embedded to 6_2-2016q4,20161216 (https://github.com/Homebrew/homebrew-cask/pull/28143)arm-none-eabi-gcc 20150921 (new formula) (https://github.com/Homebrew/legacy-homebrew/pull/45236)Adding recipe for Pebble SDK 2.0-BETA5 (https://github.com/Homebrew/legacy-homebrew/pull/24834)vikke@kosanji:~/vcswork/qmk_firmware[master]$ brew install gcc-arm-none-eabiError: No available formula with the name "gcc-arm-none-eabi"Warning: homebrew/core is shallow clone. To get complete history run: git -C "$(brew --repo homebrew/core)" fetch --unshallow==> Searching for a previously deleted formula (in the last month)...Error: No previously deleted formula found.Error: No similarly named formulae found.==> Searching taps on GitHub...==> Searching for similarly named formulae...==> Searching taps...Error: No formulae found in taps.How to do it?