Script for setting up the proper GCC set up for CS 392 on macOS

cs392_mac_setup.sh

#!/bin/bash
# Script for setting up the proper GCC set up for CS 392 on macOS
# This script installs GCC version 6


# Check for Homebrew and install it if not present
echo "Checking for brew"
if ! which brew
then
    echo "Installing Homebrew"
    /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
fi


# Check if gcc-6 is present and install it if not
if ! which gcc-6
then
    echo "Installing GCC 6"
    brew install gcc@6
fi


# Add the alias to the shell to override the issues with clang
# Also rebinds g++ to avoid C++ issues in 492.
echo 'alias gcc="gcc-6"' >> .bash_profile
echo 'alias g++="g++-6"' >> .bash_profile
if [ -e ~/.zshrc ]
then
    echo 'alias gcc="gcc-6"' >> .zshrc
    echo 'alias g++="g++-6"' >> .zshrc
fi


# Alias it in the current shell anyway
alias gcc='gcc-6'