don't install pcc on ubuntu-20.04, where it is broken #18

	name: C

	on: push

	jobs:
	c-lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	with:
	submodules: true

	- name: Setup clang-tidy
	run: sudo apt-get install -y clang-tidy

	- name: Run tests
	run: make clint

	c:
	strategy:
	fail-fast: false
	matrix:
	# compiler: ["llvm", "gcc"]
	# # compiler targets (ideally): clang, gcc, MSVCC, pcc, tcc, icc,
	os: [ubuntu-latest, windows-latest, macos-latest, macos-13, 'ubuntu-20.04']
	# include:
	# - os: windows-latest
	# compiler: msvc
	# - os: windows-latest
	# compiler: mingw
	runs-on: ${{ matrix.os }}

	steps:
	- uses: actions/checkout@v3
	with:
	submodules: true

	- name: Use Python 3.10
	uses: actions/setup-python@v5
	with:
	python-version: "3.10"
	cache-dependency-path: '*/requirements.txt'

	- name: Setup tcc, pcc
	if: ${{ matrix.os == 'ubuntu-latest' }}
	run: sudo apt-get install -y tcc pcc

	# - name: Setup Cpp ${{ matrix.compiler }}
	# uses: aminya/setup-cpp@v1
	# if: ${{ contains(matrix.compiler, fromJSON('["llvm", "gcc", "msvc"]')) }}
	# with:
	# compiler: ${{ matrix.compiler }}

	# - name: Set up MinGW
	# uses: egor-tensin/setup-mingw@v2
	# if: ${{ matrix.compiler == 'mingw' }}
	# with:
	# platform: x64

	- name: Run tests (linux)
	if: ${{ contains(matrix.os, 'ubuntu') }}
	run: make ctest${{ (matrix.os != 'ubuntu-latest' && '_auto') \|\| '' }}

	- name: Run tests (windows)
	if: ${{ contains(matrix.os, 'windows') }}
	run: make ctest_auto

	- name: Run tests (macos)
	if: ${{ contains(matrix.os, 'macos') }}
	run: make ctest_auto
	env:
	NO_OPTIONAL_TESTS: true
	COMPILER_OVERRIDE: clang

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