More linux compilers #9

	name: "Ubuntu 20.04"
	on:
	push:
	branches: [ master ]
	pull_request:
	# branches: [ master ]

	jobs:
	Oldest:
	runs-on: ubuntu-20.04
	strategy:
	matrix:
	compiler: [
	{ "name": "gcc", "version": "7", "cpp": "g++"},
	{ "name": "clang", "version": "7", "cpp": "clang++"},
	]
	env:
	CMAKE_OPTIONS: -DDEV_MODE=ON -DBUILD_TESTING=ON
	CMAKE_MATROSKA_OPTIONS: -DBUILD_EXAMPLES=ON
	CXX: ${{ matrix.compiler.cpp }}-${{ matrix.compiler.version }}
	steps:
	# - uses: egor-tensin/setup-gcc@v1
	# with:
	# version: 7

	- name: Install
	# we need the apt update because old packages won't load
	run: \|
	sudo apt update
	sudo apt install ${{ matrix.compiler.cpp }}-${{ matrix.compiler.version }}

	- name: list compilers
	run: dpkg --list \| grep compiler

	- name: Get pushed code
	uses: actions/checkout@v4

	- name: Checkout libebml
	uses: actions/checkout@v4
	with:
	repository: Matroska-Org/libebml
	path: libebml
	# minimum version we support ref: 'release-1.4.3'

	- name: Configure libebml
	run: cmake -S libebml -B libebml/_build ${{ env.CMAKE_OPTIONS }}

	- name: Build libebml
	run: cmake --build libebml/_build --parallel

	- name: Install libebml
	run: cmake --install libebml/_build --prefix ${GITHUB_WORKSPACE}/_built

	- name: Configure
	run: cmake -S . -B _build ${{ env.CMAKE_OPTIONS }} ${{ env.CMAKE_MATROSKA_OPTIONS }} -DEBML_DIR="${GITHUB_WORKSPACE}/_built/lib/cmake/EBML"

	- name: Build
	run: cmake --build _build --parallel

	- name: Test installation
	run: cmake --install _build --prefix ${GITHUB_WORKSPACE}/_built

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