return an error when adding backend stream fails #463

	name: C/C++ CI linux

	on: [push]

	jobs:
	build:
	strategy:
	matrix:
	buildtype: [Debug, Release]

	runs-on: ubuntu-latest

	steps:
	- name: Remove unnecessary directories to free up space
	run: \|
	sudo rm -rf /opt/hostedtoolcache/CodeQL
	sudo rm -rf /usr/local/lib/android/sdk/ndk
	sudo rm -rf /usr/share/dotnet

	- uses: actions/checkout@v4
	- run: git fetch --prune --unshallow --tags

	- name: pkg
	run: sudo apt-get update && sudo apt-get install -y --no-install-recommends g++ autoconf automake libtool xz-utils libasound2-dev libpulse-dev libgtk-3-dev cmake p7zip-full

	- name: depot_tools
	run: \|
	git clone --depth 1 https://chromium.googlesource.com/chromium/tools/depot_tools.git
	echo "$(pwd)/depot_tools" >> $GITHUB_PATH

	- name: fetch webrtc
	run: \|
	mkdir webrtc
	pushd webrtc
	fetch --nohooks webrtc
	popd

	- name: build
	run: \|
	export PATH=$(pwd)/webrtc/src/third_party/llvm-build/Release+Asserts/bin:$PATH
	cmake -DWEBRTCROOT=$(pwd)/webrtc -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_BUILD_TYPE=${{ matrix.buildtype }} .
	make

	- name: cpack
	run: \|
	rm -f *.tar.gz
	cpack
	echo "artifactPath=$(ls *.tar.gz)" >> $GITHUB_ENV

	- uses: actions/upload-artifact@v3
	with:
	name: ${{ env.artifactPath }}
	path: ${{ env.artifactPath }}

	- name: Release
	uses: softprops/action-gh-release@v2
	if: startsWith(github.ref, 'refs/tags/')
	with:
	files: ${{ env.artifactPath }}

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