Test stable

.github/workflows/wheels.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-20.04, windows-latest, macos-13, macos-14]
-        python: [cp38, cp39, cp310, cp311, cp312, cp313]
+        python: [cp38, cp39, cp310, cp311, cp312, cp313, cp313_stable]
         exclude:
           - os: macos-14
             python: cp38
@@ -50,12 +50,20 @@ jobs:
         run: |
           python -m pip install cibuildwheel==2.20.0
 
-      - name: Build wheels
+      - name: Build wheel
+        if: ! ${{ endsWith(matrix.python, '_stable') }}
         env:
           CIBW_BUILD: ${{ matrix.python }}-*
         run: |
           python -m cibuildwheel --output-dir wheelhouse
 
+      - name: Build stable ABI wheel
+        if: ${{ endsWith(matrix.python, '_stable') }}
+        run: |
+          stable_cp=$(echo ${{ matrix.python }} | cut -d_ -f1)
+          echo "CIBW_BUILD=$(stable_cp)" >> $GITHUB_ENV
+          python -m cibuildwheel --output-dir wheelhouse
+
       - uses: actions/upload-artifact@v3
         with:
           name: wheels

CMakeLists.txt

@@ -25,6 +25,9 @@ if (NOT MSVC)
   option(DRJIT_SANITIZE_INTENSE "Add costly internal instrumentation to catch undefined behavior." OFF)
 endif()
 
+option(DRJIT_STABLE_ABI "Build Python extension using the CPython stable ABI? (Only relevant when using scikit-build)" OFF)
+mark_as_advanced(DRJIT_STABLE_ABI)
+
 # ----------------------------------------------------------
 #  Check if submodules have been checked out, or fail early
 # ----------------------------------------------------------

pyproject.toml

@@ -49,13 +49,17 @@ logging.level = "INFO"
 build-verbosity = 1
 
 #build = ["cp38-*", "cp39-*", "cp310-*", "cp311-*", "cp312-*", "cp313-*"]
-build = ["cp313-*"]
+build = ["cp312-*"]
 archs = ["auto64"]
 skip = "*-musllinux* pp*"
 
 # Try to import the package to see if it was built correctly (compromise)
 test-command = "python -c \"import drjit\""
 
+config-settings = "\"wheel.py-api=cp312\""
+#[tool.cibuildwheel.config-settings.wheel]
+#py-api = "cp312"
+
 # Needed for full C++17 support
 [tool.cibuildwheel.macos.environment]
 MACOSX_DEPLOYMENT_TARGET = "10.14"

src/python/CMakeLists.txt

@@ -3,6 +3,10 @@ if (SKBUILD)
   set(DRJIT_DIST_FLAGS LTO)
 endif()
 
+if (SKBUILD AND DRJIT_STABLE_ABI)
+    list(APPEND DRJIT_DIST_FLAGS STABLE_ABI)
+endif()
+
 # ------------------- Copy Python resources -------------------
 
 set(DRJIT_PYTHON_SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../../drjit")