ENH: Compile free-threading wheels

.github/workflows/release.yml

@@ -146,7 +146,7 @@ jobs:
           BUILDKIT_PROGRESS: plain
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v3.0.1
+        uses: pypa/cibuildwheel@v3.1.3
 
       - uses: actions/upload-artifact@v4
         with:
@@ -229,7 +229,7 @@ jobs:
           path: ${{ matrix.vcpkg_logs }}
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v3.0.1
+        uses: pypa/cibuildwheel@v3.1.3
         env:
           # CIBW needs to know triplet for the correct install path
           VCPKG_DEFAULT_TRIPLET: ${{ matrix.triplet }}

ci/manylinux2014_x86_64-vcpkg-gdal.Dockerfile

@@ -1,4 +1,4 @@
-FROM quay.io/pypa/manylinux2014_x86_64:2025-01-11-3165879
+FROM quay.io/pypa/manylinux2014_x86_64:2025.07.27-1
 
 # building openssl needs IPC-Cmd (https://github.com/microsoft/vcpkg/issues/24988)
 RUN yum install -y curl unzip zip tar perl-IPC-Cmd

ci/manylinux_2_28_aarch64-vcpkg-gdal.Dockerfile

@@ -1,4 +1,4 @@
-FROM quay.io/pypa/manylinux_2_28_aarch64:2025-01-11-3165879
+FROM quay.io/pypa/manylinux_2_28_aarch64:2025.07.27-1
 
 # building openssl needs IPC-Cmd (https://github.com/microsoft/vcpkg/issues/24988)
 RUN dnf -y install curl zip unzip tar ninja-build perl-IPC-Cmd

ci/manylinux_2_28_x86_64-vcpkg-gdal.Dockerfile

@@ -1,4 +1,4 @@
-FROM quay.io/pypa/manylinux_2_28_x86_64:2025-01-11-3165879
+FROM quay.io/pypa/manylinux_2_28_x86_64:2025.07.27-1
 
 # building openssl needs IPC-Cmd (https://github.com/microsoft/vcpkg/issues/24988)
 RUN dnf -y install curl zip unzip tar ninja-build perl-IPC-Cmd

pyproject.toml

@@ -1,7 +1,7 @@
 [build-system]
 requires = [
     "setuptools",
-    "Cython>=0.29",
+    "Cython>=3.1",
     "versioneer[toml]==0.28",
     # tomli is used by versioneer
     "tomli; python_version < '3.11'",
@@ -26,12 +26,13 @@ classifiers = [
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3",
     "Topic :: Scientific/Engineering :: GIS",
+    "Programming Language :: Python :: Free Threading :: 2 - Beta",
 ]
 requires-python = ">=3.9"
 dependencies = ["certifi", "numpy", "packaging"]
 
 [project.optional-dependencies]
-dev = ["cython"]
+dev = ["cython>=3.1"]
 test = ["pytest", "pytest-cov"]
 benchmark = ["pytest-benchmark"]
 geopandas = ["geopandas"]
@@ -41,11 +42,12 @@ Home = "https://pyogrio.readthedocs.io/"
 Repository = "https://github.com/geopandas/pyogrio"
 
 [tool.cibuildwheel]
-skip = ["pp*", "*musllinux*"]
+skip = ["*musllinux*"]
 archs = ["auto64"]
 manylinux-x86_64-image = "manylinux-x86_64-vcpkg-gdal:latest"
 manylinux-aarch64-image = "manylinux-aarch64-vcpkg-gdal:latest"
 build-verbosity = 3
+enable = ["cpython-freethreading"]
 
 [tool.cibuildwheel.linux.environment]
 VCPKG_INSTALL = "$VCPKG_INSTALLATION_ROOT/installed/$VCPKG_DEFAULT_TRIPLET"

setup.py

@@ -169,7 +169,7 @@ def get_gdal_config():
             Extension("pyogrio._ogr", ["pyogrio/_ogr.pyx"], **ext_options),
             Extension("pyogrio._vsi", ["pyogrio/_vsi.pyx"], **ext_options),
         ],
-        compiler_directives={"language_level": "3"},
+        compiler_directives={"language_level": "3", "freethreading_compatible": True},
         compile_time_env=compile_time_env,
     )