Fix Linux Python 3.12 wheel build (#102)

* Install libffi-dev for Ubuntu Python 3.12 wheel

* Drop 3.12 from regular tests as it's not available from Conda yet

Author: alugowski

.github/workflows/wheels.yml

@@ -120,6 +120,9 @@ jobs:
           # Build SuiteSparse
           CIBW_BEFORE_ALL: bash suitesparse.sh ${{ github.ref }}
 
+          # Install FFI dev library, needed for Python 3.12
+          CIBW_BEFORE_BUILD_LINUX: yum install -y libffi-devel
+
           CIBW_ENVIRONMENT_LINUX: SUITESPARSE_FAST_BUILD=${{ env.SUITESPARSE_FAST_BUILD }}
 
           # CMAKE_GNUtoMS=ON asks suitesparse.sh to build libraries in MSVC style on Windows.

pyproject.toml

@@ -53,6 +53,7 @@ classifiers = [
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3 :: Only",
     "Intended Audience :: Developers",
     "Intended Audience :: Other Audience",