build: backport ftcompat fix

Author: cpcloud

cuda_bindings/setup.py

@@ -326,7 +326,7 @@ def do_cythonize(extensions):
     return cythonize(
         extensions,
         nthreads=nthreads,
-        compiler_directives=dict(language_level=3, embedsignature=True, binding=True),
+        compiler_directives=dict(language_level=3, embedsignature=True, binding=True, freethreading_compatible=True),
         **extra_cythonize_kwargs,
     )
 

cuda_bindings/tests/cython/build_tests.bat

@@ -5,5 +5,5 @@ REM SPDX-License-Identifier: LicenseRef-NVIDIA-SOFTWARE-LICENSE
 
 setlocal
 	set CL=%CL% /I"%CUDA_HOME%\include"
-	cythonize -3 -i %~dp0test_*.pyx
+	cythonize -3 -i -Xfreethreading_compatible=True %~dp0test_*.pyx
 endlocal

cuda_bindings/tests/cython/build_tests.sh

@@ -14,4 +14,4 @@ else
   exit 1
 fi
 
-cythonize -3 -i ${SCRIPTPATH}/test_*.pyx
+cythonize -3 -i -Xfreethreading_compatible=True ${SCRIPTPATH}/test_*.pyx

cuda_core/pyproject.toml

@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 [build-system]
-requires = ["setuptools>=77.0.0", "Cython>=3.0"]
+requires = ["setuptools>=77.0.0", "Cython>=3.1"]
 build-backend = "setuptools.build_meta"
 
 
@@ -48,7 +48,7 @@ dependencies = [
 [project.optional-dependencies]
 cu11 = ["cuda-bindings[all]==11.8.*"]
 cu12 = ["cuda-bindings[all]==12.*"]
-test = ["cython>=3.0", "setuptools", "pytest>=6.2.4"]
+test = ["cython>=3.1", "setuptools", "pytest>=6.2.4"]
 test-cu11 = ["cuda-core[test]", "cupy-cuda11x", "nvidia-cuda-runtime-cu11"]  # runtime headers needed by CuPy
 test-cu12 = ["cuda-core[test]", "cupy-cuda12x", "nvidia-cuda-runtime-cu12"]  # runtime headers needed by CuPy
 

cuda_core/setup.py

@@ -41,7 +41,12 @@ def build_extensions(self):
 
 
 setup(
-    ext_modules=cythonize(ext_modules, verbose=True, language_level=3, compiler_directives={"embedsignature": True}),
+    ext_modules=cythonize(
+        ext_modules,
+        verbose=True,
+        language_level=3,
+        compiler_directives={"embedsignature": True, "freethreading_compatible": True},
+    ),
     cmdclass={
         "build_ext": build_ext,
     },

cuda_core/tests/cython/build_tests.sh

@@ -15,4 +15,4 @@ else
   exit 1
 fi
 
-cythonize -3 -i ${SCRIPTPATH}/test_*.pyx
+cythonize -3 -i -Xfreethreading_compatible=True ${SCRIPTPATH}/test_*.pyx