Support for free-threaded build of CPython #440

	# Test on Ubuntu with various compiler and language standard versions.
	name: Test Ubuntu

	on:
	push:
	pull_request:
	workflow_dispatch:

	jobs:
	build:
	runs-on: ubuntu-latest

	strategy:
	fail-fast: false
	matrix:
	python-version: ['3.14']
	cxx: [g++, clang++]
	std: [c++11, c++14, c++17]
	include:
	# Also test with free-threaded build of Python
	- python-version: '3.14t'
	cxx: clang++
	std: c++17

	container:
	# Add the appropriate docker image for the compiler.
	# The images from teeks99/boost-python-test already have boost::python
	# pre-reqs installed, see:
	# https://github.com/teeks99/boost-python-test-docker
	image: ${{ matrix.cxx == 'g++' &&
	'teeks99/boost-python-test:gcc-15_1.89.0' \|\|
	'teeks99/boost-python-test:clang-21_1.89.0' }}

	steps:
	- uses: actions/checkout@v5
	- name: setup python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: setup prerequisites
	run: \|
	echo "CXX=${{ matrix.cxx }}" >> "$GITHUB_ENV"
	echo "CXX_STD=${{ matrix.std }}" >> "$GITHUB_ENV"
	- name: build
	run: \|
	.github/run-faber.sh
	- name: test
	run: \|
	.github/run-faber.sh test.report

Provide feedback