minor doc update #279

	---
	name: Build

	on:
	pull_request:
	push:

	permissions: {}

	jobs:
	linux:
	name: Linux
	runs-on: ubuntu-latest
	steps:
	- name: Check out the repository
	uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
	- name: Install SDL2
	run: \|
	sudo apt-get update
	sudo apt-get install libsdl2-dev
	- name: Build Stella
	run: \|
	./configure && make -j2 all

	macos:
	name: macOS
	runs-on: macos-latest
	steps:
	- name: Check out the repository
	uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
	- name: Install SDL2
	run: \|
	curl https://www.libsdl.org/release/SDL2-2.26.0.tar.gz \| tar xzf -
	mkdir SDL2-2.26.0/build
	cd SDL2-2.26.0/build
	../configure && make -j3 && sudo make install
	- name: Build Stella
	run: \|
	./configure && make -j3 all

	windows:
	name: Windows
	runs-on: windows-latest
	strategy:
	matrix:
	platform: [x64, Win32]
	env:
	Platform: ${{ matrix.platform }}
	SDL2_version: 2.26.0
	steps:
	- name: Check out the repository
	uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
	- name: Set up MSBUILD
	uses: microsoft/setup-msbuild@34cfbaee7f672c76950673338facd8a73f637506
	- name: Install SDL2
	shell: cmd
	run: \|
	curl -o "C:\SDL2-devel.zip" "https://www.libsdl.org/release/SDL2-devel-%SDL2_version%-VC.zip"
	7z x "C:\SDL2-devel.zip" -o"C:\"
	xcopy /S "C:\SDL2-%SDL2_version%\include" src\common
	if %Platform%==x64 xcopy /S "C:\SDL2-%SDL2_version%\lib\x64" src\os\windows
	if %Platform%==Win32 xcopy /S "C:\SDL2-%SDL2_version%\lib\x86" src\os\windows
	- name: Build Stella
	run: \|
	msbuild src\os\windows\Stella.sln

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