updated gcc setup and added build cache to github actions #222

	---
	#----------------------------------------------------------------------------------------
	# FILENAME:
	# test_linux.yml
	# DESCRIPTION:
	# GitHub Actions configuration for Linux.
	# AUTHOR:
	# Adam Erickson (Nervosys)
	# DATE:
	# 2024-02-20
	# NOTES:
	#
	# Copyright © 2024 Nervosys, LLC
	#----------------------------------------------------------------------------------------

	name: "Build: Linux"

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master
	types: [opened, synchronize, reopened, closed]
	# workflow_dispatch:

	env:
	GCC_VERSION: "13.2.0"

	jobs:
	build-ubuntu:
	runs-on: ${{ matrix.os }} # ubuntu-latest
	strategy:
	matrix:
	os: [ubuntu-20.04, ubuntu-22.04, ubuntu-24.04] # versions 20, 22, 24 LTS
	arch:
	- amd64
	# - arm64
	steps:
	- uses: actions/checkout@v4

	- name: "Cache GCC build"
	id: cache-gcc
	uses: actions/cache@v4
	with:
	path: "gcc-$GCC_VERSION/"
	key: ${{ runner.os }}-gcc

	- name: "Build GCC from source"
	if: steps.cache-gcc.outputs.cache-hit != 'true'
	shell: bash
	run: bash /scripts/build_gcc.sh --version "$GCC_VERSION"

	- name: "Install AutonomySim Dependencies"
	shell: bash
	run: bash ./scripts/setup.sh

	- name: "Build AutonomySim"
	shell: bash
	run: bash ./scripts/build.sh

	# - name: "Build AutonomySim ROS2 Wrapper"
	# # if: ${{ matrix.os == 'ubuntu-20.04' }}
	# shell: bash
	# run: bash ./scripts/build_ros2_ubuntu.sh

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