Install ruby-1.8.7 with rbenv on macOS Catalina (10.15)

rbenv-ruby187-macos.sh

#!/bin/sh

# 1) Install Xcode 11
# 2) Install command line tools: `xcode-select --install`
# 3) Install HomeBrew
# 4) brew tap cartr/qt4 && brew install cartr/qt4/openssl@1.0 subversion rbenv
# 5) Setup rbenv
# 6) Run this command

PKG_CONFIG_PATH="$(brew --prefix cartr/qt4/openssl@1.0)/lib/pkgconfig" \
CFLAGS="-O2 -fno-tree-dce -fno-optimize-sibling-calls -I$(brew --prefix cartr/qt4/openssl@1.0)/include" \
LDFLAGS="-L$(brew --prefix cartr/qt4/openssl@1.0)/lib" \
rbenv install 1.8.7-p375

# If your macOS is older than 10.15, see the history of this gist.