Add ubuntu-24.04-arm to CI workflow matrix and build wheels for free-threading

.github/workflows/ci.yml

@@ -21,20 +21,20 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: ['macos-14', 'macos-latest', 'ubuntu-latest', 'windows-latest']
-        python-version: ['3.12', '3.13', '3.14']
+        os: ['macos-latest', 'ubuntu-latest', 'windows-latest']
+        python-version: ['3.12', '3.13', '3.14', '3.14t']
     steps:
     - name: Set up the repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
           submodules: recursive
           fetch-depth: 0
     - name: Setup Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
     - name: Setup uv
-      uses: astral-sh/setup-uv@v6
+      uses: astral-sh/setup-uv@v7
     - name: Build
       run: |
         uv sync --frozen --inexact -v --no-install-project

.github/workflows/dist.yml

@@ -15,8 +15,8 @@ jobs:
     name: Build sdist
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: astral-sh/setup-uv@v6
+      - uses: actions/checkout@v6
+      - uses: astral-sh/setup-uv@v7.4.0
       - name: Build sdist
         run: uv build --sdist
       - uses: actions/upload-artifact@v4
@@ -35,12 +35,15 @@ jobs:
           - windows-latest
           - windows-11-arm
           - macos-latest
+          - ubuntu-24.04-arm
+          - macos-15-intel
+
     steps:
-      - uses: actions/checkout@v4
-      - uses: astral-sh/setup-uv@v6
+      - uses: actions/checkout@v6
+      - uses: astral-sh/setup-uv@v7.4.0
       - name: Build wheels
-        uses: pypa/cibuildwheel@v3.1
-      - uses: actions/upload-artifact@v4
+        uses: pypa/cibuildwheel@v3.4.0
+      - uses: actions/upload-artifact@v7.0.0
         with:
           name: release-wheels-${{ matrix.os }}
           path: wheelhouse/*.whl
@@ -50,14 +53,13 @@ jobs:
     # https://github.com/pypa/gh-action-pypi-publish
     name: Upload wheels to PyPI
     needs: [build_wheels, make_sdist]
-    if: 
     runs-on: ubuntu-latest
     permissions:
       id-token: write
       attestations: write
       contents: read
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8.0.1
         with:
           pattern: release-*
           path: dist
@@ -67,7 +69,7 @@ jobs:
         run: ls -l -R dist
 
       - name: Generate artifact attestations
-        uses: actions/attest-build-provenance@v2
+        uses: actions/attest-build-provenance@v4.1.0
         if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
         with:
           subject-path: "dist/*"

.github/workflows/flake.yml

@@ -12,14 +12,14 @@ jobs:
         runs-on: [ubuntu-latest]
         steps:
         - name: Set up the repository
-          uses: actions/checkout@v2
+          uses: actions/checkout@v6
           with:
               submodules: recursive
               fetch-depth: 0
         - name: Set up Python
-          uses: actions/setup-python@v2
+          uses: actions/setup-python@v6
           with:
-              python-version: 3.8
+              python-version: '3.12'
         - name: Install dependencies
           run: |
               python -m pip install --upgrade pip

meson.build

@@ -1,6 +1,10 @@
-project('cysignals', 'c', 'cpp', 'cython',
-  version: '1.12.6',
-  default_options: ['warning_level=2', 'cpp_std=c++17']
+project(
+    'cysignals',
+    'c',
+    'cpp',
+    'cython',
+    version: '1.12.6',
+    default_options: ['warning_level=2', 'cpp_std=c++17'],
 )
 
 # Python
@@ -15,17 +19,17 @@ cxx = meson.get_compiler('cpp')
 is_windows = host_machine.system() == 'windows'
 is_cygwin = host_machine.system() == 'cygwin'
 is_msvc = cc.get_id() == 'msvc'
-is_mingw = cc.get_id()=='gcc' and host_machine.system()=='windows'
+is_mingw = cc.get_id() == 'gcc' and host_machine.system() == 'windows'
 
 # Set preprocessor macros
 # Disable .c line numbers in exception tracebacks
 add_project_arguments('-DCYTHON_CLINE_IN_TRACEBACK=0', language: 'c')
 
 # Platform-specific settings
 if is_cygwin
-  # On Cygwin FD_SETSIZE defaults to a rather low 64; we set it higher for use with PSelecter
-  # See https://github.com/sagemath/cysignals/pull/57
-  add_project_arguments('-DFD_SETSIZE=512', language: 'c')
+    # On Cygwin FD_SETSIZE defaults to a rather low 64; we set it higher for use with PSelecter
+    # See https://github.com/sagemath/cysignals/pull/57
+    add_project_arguments('-DFD_SETSIZE=512', language: 'c')
 endif
 
 config = configuration_data()
@@ -47,10 +51,14 @@ config.set('HAVE_BACKTRACE', cc.has_function('backtrace') ? 1 : 0)
 
 # We add the "leal" instruction to reduce false positives in case some
 # non-x86 architecture also has an "emms" instruction.
-config.set('HAVE_EMMS', cc.links('int main() { asm("leal (%eax), %eax; emms"); return 0; }') ? 1 : 0)
+config.set(
+    'HAVE_EMMS',
+    cc.links('int main() { asm("leal (%eax), %eax; emms"); return 0; }') ? 1 : 0,
+)
 
 # Whether setjmp() saves the signal mask
-setjmp_saves_mask = cc.links('''
+setjmp_saves_mask = cc.links(
+    '''
 #include <stdlib.h>
 #include <setjmp.h>
 #include <signal.h>
@@ -67,49 +75,94 @@ int main() {
     if (sigprocmask(SIG_SETMASK, NULL, &set)) return 4;
     return sigismember(&set, SIGFPE);
 }
-''')
-gnulibc = cc.links('''
+''',
+)
+gnulibc = cc.links(
+    '''
   #include <features.h>
   #ifndef __GLIBC__
   syntax error!
   #endif
   int main() { return 0; }
-''')
+''',
+)
 # Define to 1 to use sigsetjmp() in sig_on(), as opposed to setjmp().
 config.set('CYSIGNALS_USE_SIGSETJMP', (setjmp_saves_mask or gnulibc) ? 1 : 0)
 
 # Check for atomic operations
 # for _Atomic in C code
-config.set('CYSIGNALS_C_ATOMIC', cc.links('int main(void) { static _Atomic int x; return 0; }') ? 1 : 0)
+config.set(
+    'CYSIGNALS_C_ATOMIC',
+    cc.links('int main(void) { static _Atomic int x; return 0; }') ? 1 : 0,
+)
 # for _Atomic with OpenMP in C code
-config.set('CYSIGNALS_C_ATOMIC_WITH_OPENMP', cc.links('int main(void) { static _Atomic int x; return 0; }', args: ['-fopenmp']) ? 1 : 0)
+config.set(
+    'CYSIGNALS_C_ATOMIC_WITH_OPENMP',
+    cc.links(
+        'int main(void) { static _Atomic int x; return 0; }',
+        args: ['-fopenmp'],
+    ) ? 1 : 0,
+)
 # for _Atomic in C++ code
-config.set('CYSIGNALS_CXX_ATOMIC', cxx.links('int main() { static _Atomic int x; return 0; }') ? 1 : 0)
+config.set(
+    'CYSIGNALS_CXX_ATOMIC',
+    cxx.links('int main() { static _Atomic int x; return 0; }') ? 1 : 0,
+)
 # for _Atomic with OpenMP in C++ code
-config.set('CYSIGNALS_CXX_ATOMIC_WITH_OPENMP', cxx.links('int main() { static _Atomic int x; return 0; }', args: ['-fopenmp']) ? 1 : 0)
+config.set(
+    'CYSIGNALS_CXX_ATOMIC_WITH_OPENMP',
+    cxx.links(
+        'int main() { static _Atomic int x; return 0; }',
+        args: ['-fopenmp'],
+    ) ? 1 : 0,
+)
 # for std::atomic in C++ code
-config.set('CYSIGNALS_STD_ATOMIC', cxx.links('#include <atomic>\nint main() { static std::atomic<int> x; return 0; }') ? 1 : 0)
+config.set(
+    'CYSIGNALS_STD_ATOMIC',
+    cxx.links(
+        '#include <atomic>\nint main() { static std::atomic<int> x; return 0; }',
+    ) ? 1 : 0,
+)
 # for std::atomic with OpenMP in C++ code
-config.set('CYSIGNALS_STD_ATOMIC_WITH_OPENMP', cxx.links('#include <atomic>\nint main() { static std::atomic<int> x; return 0; }', args: ['-fopenmp']) ? 1 : 0)
+config.set(
+    'CYSIGNALS_STD_ATOMIC_WITH_OPENMP',
+    cxx.links(
+        '#include <atomic>\nint main() { static std::atomic<int> x; return 0; }',
+        args: ['-fopenmp'],
+    ) ? 1 : 0,
+)
 
 if is_windows
-  threads_dep = []
+    threads_dep = []
 else
-  threads_dep = dependency('threads')
+    threads_dep = dependency('threads')
 endif
 
 subdir('src')
 
 pytest = py_module.find_installation(modules: ['pytest'], required: false)
 if pytest.found()
-  test('pytest', pytest, args: ['-m', 'pytest'], workdir: meson.current_source_dir(), timeout: 300, verbose: true, is_parallel: false)
+    test(
+        'pytest',
+        pytest,
+        args: ['-m', 'pytest'],
+        workdir: meson.current_source_dir(),
+        timeout: 300,
+        verbose: true,
+        is_parallel: false,
+    )
 else
-  message('pytest not found, skipping tests')
+    message('pytest not found, skipping tests')
 endif
 
 build = py_module.find_installation(modules: ['build'], required: false)
 if build.found()
-  test('example', py, args: ['-m', 'build', '--no-isolation', 'example'], workdir: meson.current_source_dir())
+    test(
+        'example',
+        py,
+        args: ['-m', 'build', '--no-isolation', 'example'],
+        workdir: meson.current_source_dir(),
+    )
 else
-  message('build not found, skipping example')
+    message('build not found, skipping example')
 endif

pyproject.toml

@@ -51,7 +51,8 @@ dev = [
 ]
 
 [tool.cibuildwheel]
-skip = ["*-win32"]
+enable = ["cpython-freethreading"]
+skip = ["*-win32", "cp313t-*"]
 test-groups = ["dev"]
 test-sources = ["tests", "pyproject.toml"]
 test-command = "python -m pytest"

src/cysignals/meson.build

@@ -1,4 +1,20 @@
-configure_file(output: 'cysignals_config.h', configuration: config, install_dir: py.get_install_dir(pure: false) / 'cysignals', install: true)
+pkgconf = configuration_data()
+pkgconf.set('VERSION', meson.project_version())
+
+configure_file(
+    output: 'cysignals_config.h',
+    configuration: config,
+    install_dir: py.get_install_dir(pure: false) / 'cysignals',
+    install: true,
+)
+
+configure_file(
+    input: 'cysignals.pc.in',
+    output: 'cysignals.pc',
+    configuration: pkgconf,
+    install_dir: py.get_install_dir(pure: false) / 'cysignals',
+    install: true,
+)
 
 pc_config = configuration_data()
 pc_config.set('VERSION', meson.project_version())
@@ -12,7 +28,7 @@ py.install_sources(
     'signals.pxd',
     'struct_signals.h',
     'macros.h',
-    subdir: 'cysignals'
+    subdir: 'cysignals',
 )
 
 extensions = {
@@ -29,7 +45,8 @@ foreach name, pyx : extensions
         continue
     endif
 
-    py.extension_module(name,
+    py.extension_module(
+        name,
         pyx,
         include_directories: [include_directories('.'), src],
         cython_args: ['-Wextra'],

src/scripts/meson.build

@@ -1,2 +1,2 @@
-install_data('cysignals-CSI', install_dir : get_option('bindir'))
+install_data('cysignals-CSI', install_dir: get_option('bindir'))