Add clang CI test

Author: PointKernel

.github/workflows/clang16-build.yml

@@ -0,0 +1,121 @@
+# SPDX-FileCopyrightText: Copyright (c) 2023-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Clang 16 Build
+
+defaults:
+  run:
+    shell: bash -euo pipefail {0}
+
+on:
+  push:
+    branches:
+      - "pull-request/[0-9]+"
+      - main
+      - dev
+  pull_request:
+    branches:
+      - main
+      - dev
+  workflow_dispatch:
+
+# Only runs one instance of this workflow at a time for a given ref and cancels any in-progress runs when a new one starts.
+concurrency:
+  group: ${{ github.workflow }}-on-${{ github.event_name }}-from-${{ github.ref_name }}
+  cancel-in-progress: true
+
+jobs:
+  clang16-build:
+    name: Clang 16 CUDA ${{ matrix.cuda }} Build
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        cuda: ["12.8"]
+        std: [17]
+        gpu_build_archs: ["70"]
+    container:
+      image: rapidsai/devcontainers:25.08-cpp-clang16-cuda${{ matrix.cuda }}-ubuntu22.04
+      env:
+        NVIDIA_VISIBLE_DEVICES: ${{ env.NVIDIA_VISIBLE_DEVICES }}
+        CUDA_VERSION: ${{ matrix.cuda }}
+    
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup build environment
+        run: |
+          echo "CUDA_VERSION=${{ matrix.cuda }}" >> $GITHUB_ENV
+          echo "CXX_STD=${{ matrix.std }}" >> $GITHUB_ENV
+          echo "GPU_BUILD_ARCHS=${{ matrix.gpu_build_archs }}" >> $GITHUB_ENV
+
+      - name: Build with Clang 16
+        run: |
+          ./ci/build.sh \
+            --cxx clang++ \
+            --std ${{ matrix.std }} \
+            --arch ${{ matrix.gpu_build_archs }} \
+            --infix amd64-clang16-cuda${{ matrix.cuda }}
+        env:
+          CXX: clang++
+          CUDAHOSTCXX: clang++
+
+      - name: Run tests
+        if: ${{ !contains(github.event.head_commit.message, 'skip-tests') }}
+        run: |
+          ./ci/test.sh \
+            --tests \
+            --cxx clang++ \
+            --std ${{ matrix.std }} \
+            --arch ${{ matrix.gpu_build_archs }} \
+            --infix amd64-clang16-cuda${{ matrix.cuda }}
+        env:
+          CXX: clang++
+          CUDAHOSTCXX: clang++
+
+      - name: Upload build artifacts
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: clang16-build-artifacts-cuda${{ matrix.cuda }}-std${{ matrix.std }}
+          path: |
+            build/
+            !build/**/*.o
+            !build/**/*.a
+          retention-days: 7
+
+  clang16-success:
+    runs-on: ubuntu-latest
+    name: Clang 16 Build Success
+    if: ${{ always() }}
+    needs:
+      - clang16-build
+    steps:
+      - name: Check status of Clang 16 build
+        if: >-
+          ${{
+               contains(needs.*.result, 'failure')
+            || contains(needs.*.result, 'cancelled')
+            || contains(needs.*.result, 'skipped')
+          }}
+        run: |
+          echo "❌ Clang 16 build failed or was cancelled"
+          exit 1
+      - name: Success
+        run: |
+          echo "✅ Clang 16 build completed successfully" 

ci/matrix.yml

@@ -45,4 +45,5 @@ pull_request:
     - {cuda: *cuda_oldest, os: 'ubuntu22.04', cpu: 'amd64', compiler: {name: 'gcc', version: '11', exe: 'g++'}, gpu_build_archs: '70', std: [17], jobs: ['build', 'test']}
     - {cuda: *cuda_newest, os: 'ubuntu22.04', cpu: 'amd64', compiler: {name: 'gcc', version: '12', exe: 'g++'}, gpu_build_archs: '70', std: [17], jobs: ['build', 'test']}
     - {cuda: *cuda_newest, os: 'ubuntu22.04', cpu: 'amd64', compiler: {name: 'gcc', version: '13', exe: 'g++'}, gpu_build_archs: '80', std: [17], jobs: ['build']}
+    - {cuda: *cuda_newest, os: 'ubuntu22.04', cpu: 'amd64', compiler: {name: 'clang', version: '16', exe: 'clang++'}, gpu_build_archs: '70', std: [17], jobs: ['build', 'test']}
     - {cuda: *cuda_newest, os: 'ubuntu22.04', cpu: 'arm64', compiler: {name: 'gcc', version: '12', exe: 'g++'}, gpu_build_archs: '60,90', std: [17], jobs: ['build']}