CI: Add runners that build with the root CMakeLists.txt

.github/workflows/root-cmakelists.yaml

@@ -0,0 +1,173 @@
+# Build SuiteSparse using the root CMakeLists.txt
+
+name: root-cmakelists
+
+on:
+  workflow_dispatch:
+  push:
+    branches-ignore:
+      - '**/dev2'
+  pull_request:
+
+concurrency: ci-root-cmakelists-${{ github.ref }}
+
+jobs:
+
+  ubuntu:
+    # For available GitHub-hosted runners, see:
+    # https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners
+    runs-on: ubuntu-latest
+
+    name: ubuntu (${{ matrix.compiler }} ${{ matrix.cuda }} CUDA)
+
+    strategy:
+      # Allow other runners in the matrix to continue if some fail
+      fail-fast: false
+
+      matrix:
+        compiler: [gcc, clang]
+        cuda: [with, without]
+        include:
+          - compiler: gcc
+            compiler-pkgs: "g++ gcc"
+            cc: "gcc"
+            cxx: "g++"
+          - compiler: clang
+            compiler-pkgs: "clang libomp-dev"
+            cc: "clang"
+            cxx: "clang++"
+          # Clang seems to generally require less cache size (smaller object files?).
+          - compiler: gcc
+            ccache-max: 600M
+          - compiler: clang
+            ccache-max: 500M
+          - cuda: with
+            cuda-pkgs: "nvidia-cuda-dev nvidia-cuda-toolkit"
+            cuda-cmake-flags:
+              -DENABLE_CUDA=ON
+              -DCUDAToolkit_INCLUDE_DIR="/usr/include"
+              -DCMAKE_CUDA_COMPILER_LAUNCHER="ccache"
+
+    env:
+      CC: ${{ matrix.cc }}
+      CXX: ${{ matrix.cxx }}
+
+    steps:
+      - name: checkout repository
+        uses: actions/checkout@v3
+
+      - name: install dependencies
+        env:
+          COMPILER_PKGS: ${{ matrix.compiler-pkgs }}
+          CUDA_PKGS: ${{ matrix.cuda-pkgs }}
+        run: |
+          sudo apt -qq update
+          sudo apt install -y ${COMPILER_PKGS} autoconf automake ccache cmake \
+            dvipng gfortran libgmp-dev liblapack-dev libmpfr-dev \
+            libopenblas-dev ${CUDA_PKGS}
+
+      - name: prepare ccache
+        # create key with human readable timestamp
+        # used in action/cache/restore and action/cache/save steps
+        id: ccache-prepare
+        run: |
+          echo "key=ccache:ubuntu:root:${{ matrix.compiler }}:${{ matrix.cuda }}:${{ github.ref }}:$(date +"%Y-%m-%d_%H-%M-%S"):${{ github.sha }}" >> $GITHUB_OUTPUT
+
+      - name: restore ccache
+        # setup the GitHub cache used to maintain the ccache from one job to the next
+        uses: actions/cache/restore@v3
+        with:
+          path: ~/.ccache
+          key: ${{ steps.ccache-prepare.outputs.key }}
+          # Prefer caches from the same branch. Fall back to caches from the dev branch.
+          restore-keys: |
+            ccache:ubuntu:root:${{ matrix.compiler }}:${{ matrix.cuda }}:${{ github.ref }}
+            ccache:ubuntu:root:${{ matrix.compiler }}:${{ matrix.cuda }}
+
+      - name: create empty libraries
+        # This is to work around a bug in nvlink.
+        # See: https://forums.developer.nvidia.com/t/nvlink-fatal-could-not-open-input-file-when-linking-with-empty-static-library/208517
+        if: matrix.cuda == 'with'
+        run: |
+          touch empty.c
+          gcc -fPIC -c empty.c -oempty.o
+          ar rcsv libdl.a empty.o
+          ar rcsv librt.a empty.o
+          ar rcsv libpthread.a empty.o
+          # overwrite system libraries with "valid" empty libraries
+          sudo mv ./libdl.a /usr/lib/x86_64-linux-gnu/libdl.a
+          sudo mv ./librt.a /usr/lib/x86_64-linux-gnu/librt.a
+          sudo mv ./libpthread.a /usr/lib/x86_64-linux-gnu/libpthread.a
+
+      - name: configure ccache
+        env:
+          CCACHE_MAX: ${{ matrix.ccache-max }}
+        run: |
+          test -d ~/.ccache || mkdir ~/.ccache
+          echo "max_size = $CCACHE_MAX" >> ~/.ccache/ccache.conf
+          echo "compression = true" >> ~/.ccache/ccache.conf
+          ccache -s
+          echo "/usr/lib/ccache" >> $GITHUB_PATH
+
+      - name: build libraries
+        run: |
+          printf "::group::   \033[0;32m==>\033[0m Configuring\n"
+          mkdir -p ${GITHUB_WORKSPACE}/build && cd ${GITHUB_WORKSPACE}/build
+          cmake -DCMAKE_BUILD_TYPE="Release" \
+                -DCMAKE_INSTALL_PREFIX=".." \
+                -DCMAKE_C_COMPILER_LAUNCHER="ccache" \
+                -DCMAKE_CXX_COMPILER_LAUNCHER="ccache" \
+                -DCMAKE_Fortran_COMPILER_LAUNCHER="ccache" \
+                -DBLA_VENDOR="OpenBLAS" \
+                ${{ matrix.cuda-cmake-flags }} \
+                ..
+          echo "::endgroup::"
+          printf "::group::   \033[0;32m==>\033[0m Building\n"
+          cmake --build .
+          echo "::endgroup::"
+
+      - name: build demos
+        run: |
+          printf "::group::   \033[0;32m==>\033[0m Configuring for demos\n"
+          cd ${GITHUB_WORKSPACE}/build
+          cmake -DDEMO=ON ..
+          echo "::endgroup::"
+          printf "::group::   \033[0;32m==>\033[0m Building demos\n"
+          cd ${GITHUB_WORKSPACE}/build
+          cmake --build .
+          echo "::endgroup::"
+          # FIXME: How to run the demos without Makefile?
+
+      - name: ccache status
+        continue-on-error: true
+        run: ccache -s
+
+      - name: save ccache
+        # Save the cache after we are done (successfully) building.
+        # This helps to retain the ccache even if the subsequent steps are failing.
+        uses: actions/cache/save@v3
+        with:
+          path: ~/.ccache
+          key: ${{ steps.ccache-prepare.outputs.key }}
+
+      - name: install
+        run: |
+          printf "\033[0;32m==>\033[0m Installing libraries\n"
+          cd ${GITHUB_WORKSPACE}/build
+          cmake --install .
+
+      - name: build example
+        run: |
+          cd ${GITHUB_WORKSPACE}/Example/build
+          printf "::group::\033[0;32m==>\033[0m Configuring example\n"
+          cmake \
+            -DBLA_VENDOR="OpenBLAS" \
+            ${{ matrix.cuda-cmake-flags }} \
+            ..
+          echo "::endgroup::"
+          printf "::group::\033[0;32m==>\033[0m Building example\n"
+          cmake --build .
+          echo "::endgroup::"
+          printf "::group::\033[0;32m==>\033[0m Executing example\n"
+          LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/lib ./my_demo
+          echo "::endgroup::"