Add wheels for 313t (#257)

Signed-off-by: Andreas Fehlner <fehlner@arcor.de>

Author: andife

.github/workflows/build-and-test.yml

@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-name: Build and Test, (Release)
+name: Build and Test, Release
 
 on: 
   push:
@@ -24,6 +24,7 @@ jobs:
       CIBW_BEFORE_BUILD_LINUX: pip install protobuf
       CIBW_BEFORE_BUILD_WINDOWS: python -m pip install protobuf
       CIBW_BEFORE_BUILD_MACOS: pip install protobuf
+      CIBW_ENABLE: "cpython-freethreading"
       CIBW_TEST_REQUIRES_LINUX: pytest pytest-xdist ruff mypy onnxruntime onnxscript
       CIBW_TEST_REQUIRES_MACOS: pytest pytest-xdist
       CIBW_TEST_REQUIRES_WINDOWS: pytest pytest-xdist
@@ -40,7 +41,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-24.04, windows-2022, macos-15]        
-        python: ["cp312", "cp311", "cp310"] # because of abi3 we don't need to build separate whls for python 3.13, 3.14
+        python: ["cp313t", "cp312", "cp311", "cp310"] # because of abi3 we don't need to build separate whls for python 3.13, 3.14
     steps:
     - uses: actions/checkout@v6.0.1
       with:

setup.py

@@ -291,17 +291,30 @@ def run(self):
 # Extensions
 ################################################################################
 
-py_limited_api = sys.version_info >= (3, 12)
-if py_limited_api:
-    setup_opts = {
-        "bdist_wheel": {"py_limited_api": "cp312"},
-    }
-else:
-    setup_opts = {}
+################################################################################
+# Extensions
+################################################################################
+
+# Enable limited ABI build
+# nanobind supports limited ABI for Python 3.12 and later.
+# https://blog.trailofbits.com/2022/11/15/python-wheels-abi-abi3audit/
+# 1. The Py_LIMITED_API macro is defined in the extension
+# 2. py_limited_api in Extension tags the extension as abi3
+# 3. bdist_wheel options tag the wheel as abi3
+NO_GIL = hasattr(sys, "_is_gil_enabled") and not sys._is_gil_enabled()
+PY_312_OR_NEWER = sys.version_info >= (3, 12)
+USE_LIMITED_API = not NO_GIL and PY_312_OR_NEWER and platform.system() != "FreeBSD"
+
+macros = []
+if USE_LIMITED_API:
+    macros.append(("Py_LIMITED_API", "0x030C0000"))
 
 ext_modules = [
     setuptools.Extension(
-        name="onnxoptimizer.onnx_opt_cpp2py_export", sources=[], py_limited_api=py_limited_api
+        name="onnxoptimizer.onnx_opt_cpp2py_export",
+        sources=[],
+        py_limited_api=USE_LIMITED_API,
+        define_macros=macros,
     )
 ]
 
@@ -316,6 +329,14 @@ def run(self):
 # Test
 ################################################################################
 
+bdist_wheel_options = {}
+if USE_LIMITED_API:
+    bdist_wheel_options["py_limited_api"] = "cp312"
+
+setup_opts = {}
+if bdist_wheel_options:
+    setup_opts["bdist_wheel"] = bdist_wheel_options
+
 setuptools.setup(
     version=version_info.version,
     ext_modules=ext_modules,