Let's try CLANG and GCC workflows for C++11 #1

	name: Linux C++11
	on:
	push:
	branches: [ "v3" ]
	env:
	GCC_VERSION: 11
	jobs:
	build_matrix:
	strategy:
	matrix:
	clang: [ 13, 14, 15, 16, 17 ]
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v3
	- uses: actions/cache@v3
	with:
	path: .xmake-cache
	key: xmake-cache-${{ runner.os }}
	- uses: xmake-io/github-action-setup-xmake@v1
	with:
	xmake-version: latest
	actions-cache-folder: .xmake-cache
	- if: matrix.clang == 16
	uses: KyleMayes/install-llvm-action@v1
	with:
	version: "16.0.6"
	- if: matrix.clang == 17
	uses: KyleMayes/install-llvm-action@v1
	with:
	version: "17.0.6"
	- name: Build
	run: CLANG_VERSION=${{ matrix.clang }} xmake build -w -v "Tests cxx11"
	- name: Test
	run: CLANG_VERSION=${{ matrix.clang }} xmake run "Tests cxx11"

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