test ABI3

Author: ocefpaf

.github/workflows/cibuildwheel.yml

@@ -36,8 +36,8 @@ jobs:
     - name: "Building ${{ matrix.os }} (${{ matrix.arch }}) wheels"
       uses: pypa/cibuildwheel@63fd63b352a9a8bdcc24791c9dbee952ee9a8abc  # v3.3.0
       env:
-        # Skips pypy and musllinux for now.
-        CIBW_SKIP: "pp* cp36-* cp37-* cp38-* *-musllinux*"
+        CIBW_SKIP: "*-musllinux*"
+        CIBW_BUILD: "cp311-* cp314-*"
         CIBW_ARCHS: ${{ matrix.arch }}
         CIBW_BUILD_FRONTEND: build
         CIBW_MANYLINUX_X86_64_IMAGE: manylinux_2_28

setup.py

@@ -14,6 +14,13 @@
 rootpath = os.path.abspath(os.path.dirname(__file__))
 
 
+DEFINE_MACROS = [
+    ("NPY_NO_DEPRECATED_API", "NPY_1_7_API_VERSION"),
+    # 0x030B0000 -> 3.11
+    ("Py_LIMITED_API", "0x030B0000"),
+    ("CYTHON_LIMITED_API", None),
+]
+
 def read(*parts):
     return open(os.path.join(rootpath, *parts)).read()
 
@@ -49,9 +56,15 @@ def build_extensions(self):
 ]
 
 config = {
-    "ext_modules": [Extension("gsw._gsw_ufuncs", ufunc_src_list)],
+    "ext_modules": [
+        Extension(
+            "gsw._gsw_ufuncs",
+            ufunc_src_list,
+            define_macros=DEFINE_MACROS,
+            py_limited_api=True)],
     "include_dirs": [os.path.join(rootpath, "src", "c_gsw")],
     "cmdclass": {"build_ext": build_ext},
+    "options": {"bdist_wheel": {"py_limited_api": "cp311"}},
 }
 
 setup(**config)