Configure Python 3.8.0b2 with home-brew tcl-tk and openssl

configure_with_openssl.zsh

#!/bin/zsh
# Configure Python 3.8.0b2 with homebrew tcl-tk and openssl
# on macOS Catalina public beta with Xcode 11 beta 4
# Installs to ~/local.

set -e -u

brew update
brew install openssl tcl-tk

export CPPFLAGS="-I/usr/local/opt/tcl-tk/include -I/usr/local/opt/openssl/include"
export LDFLAGS="-L/usr/local/opt/tcl-tk/lib -L/usr/local/opt/openssl/lib"

# Packages such as Anaconda Python sometimes include compiler toolchain
# components that are incompatible w. those included w. Xcode.  Ensure default
# tools are found first.  (Must also do this in the environment where 'make' is run.)
export PATH=/usr/bin:${PATH}

./configure --with-openssl=/usr/local/opt/openssl --prefix=${HOME}/local