update CI to build using clang #67

	name: build-linux

	on:
	push:
	branches: [ cpp20 ]
	pull_request:
	branches: [ cpp20 ]

	env:
	# Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
	BUILD_TYPE: Release

	jobs:
	mamba-build:
	strategy:
	matrix:
	version: [ "3.8", "3.9", "3.10", "3.11" ]
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3

	- name: Install Conda environment from environment.yml
	uses: mamba-org/provision-with-micromamba@main
	with:
	extra-specs: \|
	python=${{ matrix.version }}

	# Linux and macOS
	- name: Run Python
	shell: bash -l {0}
	run: \|
	export CC=clang
	export CXX=clang++
	bash script/dependencies.sh # install dependencies
	python setup.py bdist_wheel # build the wheel

	- name: 'Build wheel'
	uses: actions/upload-artifact@v3
	with:
	name: pyoperon-wheel
	path: dist/*.whl
	retention-days: 7

	nix-build:
	# The CMake configure and build commands are platform agnostic and should work equally well on Windows or Mac.
	# You can convert this to a matrix build if you need cross-platform coverage.
	# See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3
	- uses: cachix/install-nix-action@v16

	- name: Build
	working-directory: ${{github.workspace}}
	# Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
	# See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
	run: nix build

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