Enable tests

.github/workflows/build_wheels.yml

@@ -28,10 +28,25 @@ jobs:
         name: Install Python
         with:
           python-version: '3.12'
+      - name: Setup ccache
+        uses: hendrikmuhs/ccache-action@v1.2
+        with:
+          key: ccache-wheels-linux-${{ matrix.manylinux_image }}-${{ github.sha }}
+          max-size: 2G
+          restore-keys: |
+            ccache-wheels-linux-${{ matrix.manylinux_image }}-
+            ccache-wheels-linux-
       - name: Build wheels
         uses: pypa/cibuildwheel@v2.23.0
         env:
-          CIBW_BEFORE_BUILD: pip install cython auditwheel --upgrade
+          CIBW_BEFORE_BUILD: |
+            pip install cython auditwheel --upgrade
+            yum install -y ccache
+          CIBW_ENVIRONMENT_LINUX: >
+            CCACHE_DIR=/root/.ccache
+            CCACHE_MAXSIZE=2G
+            CMAKE_C_COMPILER_LAUNCHER=ccache
+            CMAKE_CXX_COMPILER_LAUNCHER=ccache
           CIBW_MANYLINUX_X86_64_IMAGE: ${{ matrix.manylinux_image }}
           CIBW_ARCHS_LINUX: ${{ matrix.cibw_archs }}
           CIBW_BUILD: ${{ github.ref == 'refs/heads/master' && 'cp310-* cp311-* cp312-* cp313-*' || 'cp313-*' }}
@@ -120,15 +135,30 @@ jobs:
         name: Install Python
         with:
           python-version: '3.12'
+      - name: Setup ccache
+        uses: hendrikmuhs/ccache-action@v1.2
+        with:
+          key: ccache-wheels-macos-${{ matrix.buildplat[1] }}-${{ github.sha }}
+          max-size: 2G
+          restore-keys: |
+            ccache-wheels-macos-${{ matrix.buildplat[1] }}-
+            ccache-wheels-macos-
       - name: Build wheels
         uses: pypa/cibuildwheel@v2.23.0
         env:
           CIBW_BEFORE_BUILD: 
             pip install cython &&
-            brew install libomp ninja
+            brew install libomp ninja ccache
           CIBW_ARCHS_MACOS: ${{ matrix.buildplat[1] }}
           CIBW_BUILD: ${{ github.ref == 'refs/heads/master' && 'cp310-* cp311-* cp312-* cp313-*' || 'cp313-*' }}
-          CIBW_ENVIRONMENT: CXX='c++' ${{ matrix.buildplat[2] }} MACOSX_DEPLOYMENT_TARGET='14.0'
+          CIBW_ENVIRONMENT: >
+            CXX='c++'
+            ${{ matrix.buildplat[2] }}
+            MACOSX_DEPLOYMENT_TARGET='14.0'
+            CCACHE_DIR=$HOME/.ccache
+            CCACHE_MAXSIZE=2G
+            CMAKE_C_COMPILER_LAUNCHER=ccache
+            CMAKE_CXX_COMPILER_LAUNCHER=ccache
           CIBW_SKIP: "pp* *-musllinux_*"
           CIBW_TEST_COMMAND: python3 -c 'import networkit'
           CIBW_TEST_SKIP: "*-macosx_x86_64 *-macosx_universal2:x86_64"
@@ -173,12 +203,25 @@ jobs:
         name: Install Python
         with:
           python-version: '3.12'
+      - name: Setup ccache
+        uses: hendrikmuhs/ccache-action@v1.2
+        with:
+          key: ccache-wheels-windows-${{ matrix.cibw_archs }}-${{ github.sha }}
+          max-size: 2G
+          restore-keys: |
+            ccache-wheels-windows-${{ matrix.cibw_archs }}-
+            ccache-wheels-windows-
       - name: Build wheels
         uses: pypa/cibuildwheel@v2.23.0
         env:
           CIBW_BEFORE_BUILD: pip install cython ipython
           CIBW_ARCHS: "AMD64"
           CIBW_BUILD: ${{ github.ref == 'refs/heads/master' && 'cp310-* cp311-* cp312-* cp313-*' || 'cp313-*' }}
+          CIBW_ENVIRONMENT: >
+            CCACHE_DIR=$HOME/.ccache
+            CCACHE_MAXSIZE=2G
+            CMAKE_C_COMPILER_LAUNCHER=ccache
+            CMAKE_CXX_COMPILER_LAUNCHER=ccache
           CIBW_SKIP: pp*
           CIBW_TEST_COMMAND: python -c "import networkit"
       - uses: actions/upload-artifact@v4

.github/workflows/ci-matrix.yml

@@ -39,16 +39,11 @@ jobs:
             runner: ubuntu-latest
             cc: clang-20
             cxx: clang++-20
-          - os: macos
-            compiler: gcc-14
-            runner: macos-latest
-            cc: gcc-14
-            cxx: g++-14
           - os: macos
             compiler: llvm-20
             runner: macos-latest
-            cc: /opt/homebrew/opt/llvm/bin/clang
-            cxx: /opt/homebrew/opt/llvm/bin/clang++
+            cc: /opt/homebrew/opt/llvm@20/bin/clang
+            cxx: /opt/homebrew/opt/llvm@20/bin/clang++
           - os: windows
             compiler: msvc
             runner: windows-2022
@@ -58,6 +53,12 @@ jobs:
       CC: ${{ matrix.cc }}
       CXX: ${{ matrix.cxx }}
     steps:
+      - name: Setup ccache
+        uses: hendrikmuhs/ccache-action@v1.2
+        with:
+          key: ccache-${{ matrix.os }}-${{ matrix.compiler }}-main
+          max-size: 4G
+
       - name: Checkout networkit
         uses: actions/checkout@v4
         with:
@@ -70,15 +71,6 @@ jobs:
           repository: tlx/tlx
           path: tlx
 
-      - name: Setup ccache
-        uses: hendrikmuhs/ccache-action@v1.2
-        with:
-          key: ccache-${{ matrix.os }}-${{ matrix.compiler }}-${{ github.sha }}
-          max-size: 2G
-          restore-keys: |
-            ccache-${{ matrix.os }}-${{ matrix.compiler }}-
-            ccache-${{ matrix.os }}-
-
       - name: Install prerequisites (Linux)
         if: matrix.os == 'linux' && matrix.compiler == 'llvm-20'
         run: |
@@ -103,7 +95,7 @@ jobs:
           brew install ninja apache-arrow
           if [[ "${{ matrix.compiler }}" == "llvm-20" ]]; then
             brew install libomp
-            brew reinstall llvm
+            brew reinstall llvm@20
             brew link --overwrite llvm
           fi
 
@@ -147,6 +139,7 @@ jobs:
           mkdir build && cd build
           cmake -GNinja -DNETWORKIT_STATIC=ON -DNETWORKIT_BUILD_TESTS=ON -DNETWORKIT_MONOLITH=ON -DNETWORKIT_CXX_STANDARD=${{ env.CXX_STANDARD }} -DCMAKE_BUILD_TYPE=Debug -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_TOOLCHAIN_FILE="$VCPKG_INSTALLATION_ROOT/scripts/buildsystems/vcpkg.cmake" ..
           ninja
+          ctest -V -C Debug
 
       - name: Prepare environment and run checks (Linux/macOS)
         if: matrix.os != 'windows'

.github/workflows/ci.yml

@@ -149,8 +149,8 @@ jobs:
     runs-on: macos-${{ matrix.os }}
     strategy:
       matrix:
-        os: ['latest'] # llvm and gcc are only tested on arm based machines
-        compiler: ['llvm-20', 'gcc-14']
+        os: ['latest'] # llvm is only tested on arm based machines
+        compiler: ['llvm-20']  # gcc-14 removed due to ABI incompatibility with Homebrew Arrow (built with libc++)
     steps:
       - name: Install prerequisites
         run: |
@@ -160,7 +160,7 @@ jobs:
         if: matrix.compiler == 'llvm-20'
         run: |
           brew install libomp
-          brew reinstall llvm
+          brew reinstall llvm@20
           brew link --overwrite llvm
       - name: Checkout networkit
         uses: actions/checkout@v4
@@ -170,8 +170,8 @@ jobs:
         run:  ${{ github.workspace }}/.github/workflows/scripts/cpp_only.sh
         shell: bash
         env:
-          CC: ${{ matrix.compiler == 'llvm-20' && '/opt/homebrew/opt/llvm/bin/clang' || 'gcc-14' }}
-          CXX: ${{ matrix.compiler == 'llvm-20' && '/opt/homebrew/opt/llvm/bin/clang++' || 'g++-14' }}
+          CC: ${{ matrix.compiler == 'llvm-20' && '/opt/homebrew/opt/llvm@20/bin/clang' || 'gcc-14' }}
+          CXX: ${{ matrix.compiler == 'llvm-20' && '/opt/homebrew/opt/llvm@20/bin/clang++' || 'g++-14' }}
 
   linux-build-latest:
     name: "Linux (gcc-14${{ startsWith(matrix.build-configuration, 'full') && ', CPython 3.13' || '' }}): ${{ matrix.build-configuration }}"

.github/workflows/scripts/cpp_only.sh

@@ -4,8 +4,12 @@ set -o pipefail
 
 $CXX --version
 
+if [[ "$(uname)" == "Darwin" ]]; then
+  CMAKE_PREFIX_PATH="-DCMAKE_PREFIX_PATH=/opt/homebrew/opt/libomp"
+fi
+
 mkdir debug_test && cd "$_"
-cmake -GNinja -DNETWORKIT_BUILD_TESTS=ON -DNETWORKIT_MONOLITH=$MONOLITH -DNETWORKIT_CXX_STANDARD=$CXX_STANDARD -DNETWORKIT_WARNINGS=ON -DCMAKE_BUILD_TYPE=Debug -DNETWORKIT_SANITY_CHECKS=ON -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache ..
+cmake -GNinja -DNETWORKIT_BUILD_TESTS=ON -DNETWORKIT_MONOLITH=$MONOLITH -DNETWORKIT_CXX_STANDARD=$CXX_STANDARD -DNETWORKIT_WARNINGS=ON -DCMAKE_BUILD_TYPE=Debug -DNETWORKIT_SANITY_CHECKS=ON -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache $CMAKE_PREFIX_PATH ..
 ninja
 
-#ctest -V
+ctest -V