Add Clang Linux build to CI pipeline

.github/workflows/linux-build-clang.yml

@@ -0,0 +1,55 @@
+# Copyright (c) Facebook, Inc. and its affiliates.
+#
+# 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: Linux Build using Clang
+
+on:
+  push:
+    branches:
+      - "main"
+    paths:
+      - "velox/**"
+      - "!velox/docs/**"
+      - "CMakeLists.txt"
+      - "CMake/**"
+      - "third_party/**"
+      - "scripts/setup-ubuntu.sh"
+      - "scripts/setup-helper-functions.sh"
+      - ".github/workflows/linux-build.yml"
+      - ".github/workflows/linux-build-clang.yml"
+
+  pull_request:
+    paths:
+      - "velox/**"
+      - "!velox/docs/**"
+      - "CMakeLists.txt"
+      - "CMake/**"
+      - "third_party/**"
+      - "scripts/setup-ubuntu.sh"
+      - "scripts/setup-helper-functions.sh"
+      - ".github/workflows/linux-build.yml"
+      - ".github/workflows/linux-build-clang.yml"
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.repository }}-${{ github.head_ref || github.sha }}
+  cancel-in-progress: true
+
+jobs:
+  ubuntu-clang:
+    uses: ./.github/workflows/linux-build.yml
+    with:
+      use-clang: 'true'

.github/workflows/linux-build-gcc.yml

@@ -0,0 +1,53 @@
+# Copyright (c) Facebook, Inc. and its affiliates.
+#
+# 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: Linux Build using GCC
+
+on:
+  push:
+    branches:
+      - "main"
+    paths:
+      - "velox/**"
+      - "!velox/docs/**"
+      - "CMakeLists.txt"
+      - "CMake/**"
+      - "third_party/**"
+      - "scripts/setup-ubuntu.sh"
+      - "scripts/setup-helper-functions.sh"
+      - ".github/workflows/linux-build.yml"
+      - ".github/workflows/linux-build-gcc.yml"
+
+  pull_request:
+    paths:
+      - "velox/**"
+      - "!velox/docs/**"
+      - "CMakeLists.txt"
+      - "CMake/**"
+      - "third_party/**"
+      - "scripts/setup-ubuntu.sh"
+      - "scripts/setup-helper-functions.sh"
+      - ".github/workflows/linux-build.yml"
+      - ".github/workflows/linux-build-gcc.yml"
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.repository }}-${{ github.head_ref || github.sha }}
+  cancel-in-progress: true
+
+jobs:
+  ubuntu-gcc:
+    uses: ./.github/workflows/linux-build.yml

.github/workflows/linux-build.yml

@@ -15,36 +15,13 @@
 name: Linux Build
 
 on:
-  push:
-    branches:
-      - "main"
-    paths:
-      - "velox/**"
-      - "!velox/docs/**"
-      - "CMakeLists.txt"
-      - "CMake/**"
-      - "third_party/**"
-      - "scripts/setup-ubuntu.sh"
-      - "scripts/setup-helper-functions.sh"
-      - ".github/workflows/linux-build.yml"
-
-  pull_request:
-    paths:
-      - "velox/**"
-      - "!velox/docs/**"
-      - "CMakeLists.txt"
-      - "CMake/**"
-      - "third_party/**"
-      - "scripts/setup-ubuntu.sh"
-      - "scripts/setup-helper-functions.sh"
-      - ".github/workflows/linux-build.yml"
-
-permissions:
-  contents: read
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.repository }}-${{ github.head_ref || github.sha }}
-  cancel-in-progress: true
+  workflow_call:
+    inputs:
+      use-clang:
+        description: 'Use Clang to compile the project.'
+        default: ''
+        required: false
+        type: string
 
 jobs:
   adapters:
@@ -64,6 +41,7 @@ jobs:
       xsimd_SOURCE: BUNDLED
       Arrow_SOURCE: AUTO
       CUDA_VERSION: "12.4"
+      USE_CLANG: "${{ inputs.use-clang }}"
     steps:
       - uses: actions/checkout@v4
 
@@ -110,6 +88,7 @@ jobs:
             "-DVELOX_ENABLE_GPU=ON"
             "-DVELOX_MONO_LIBRARY=ON"
           )
+          if [[ "${USE_CLANG}" = "true" ]]; then scripts/setup-centos9.sh install_clang15; CC=/usr/bin/clang-15; CXX=/usr/bin/clang++-15; CUDA_FLAGS="-ccbin /usr/lib64/llvm15/bin/clang++-15"; fi
           make release EXTRA_CMAKE_FLAGS="${EXTRA_CMAKE_FLAGS[*]}"
 
       - name: Ccache after
@@ -136,6 +115,7 @@ jobs:
     name: "Ubuntu debug with resolve_dependency"
     env:
       CCACHE_DIR: "${{ github.workspace }}/.ccache"
+      USE_CLANG: "${{ inputs.use-clang }}"
     defaults:
       run:
         shell: bash
@@ -171,7 +151,8 @@ jobs:
           MAKEFLAGS: "NUM_THREADS=8 MAX_HIGH_MEM_JOBS=4 MAX_LINK_JOBS=3"
           EXTRA_CMAKE_FLAGS: "-DVELOX_ENABLE_ARROW=ON -DVELOX_ENABLE_PARQUET=ON"
         run: |
-          make debug 
+          if [[ "${USE_CLANG}" = "true" ]]; then export CC=/usr/bin/clang-15; export CXX=/usr/bin/clang++-15; fi
+          make debug
 
       - name: CCache after
         run: |

CMakeLists.txt

@@ -211,11 +211,6 @@ if(${VELOX_FORCE_COLORED_OUTPUT})
   endif()
 endif()
 
-if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang"
-   AND "${CMAKE_CXX_COMPILER_VERSION}" VERSION_GREATER_EQUAL 15)
-  set(CMAKE_EXE_LINKER_FLAGS "-latomic")
-endif()
-
 # At the moment we prefer static linking but by default cmake looks for shared
 # libs first. This will still fallback to shared libs when static ones are not
 # found
@@ -366,6 +361,13 @@ if(${VELOX_ENABLE_GPU})
   include_directories("${CMAKE_CUDA_TOOLKIT_INCLUDE_DIRECTORIES}")
 endif()
 
+# Set after the test of the CUDA compiler. Otherwise, the test fails with
+# -latomic not found because it is added right after the compiler exe.
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang"
+   AND "${CMAKE_CXX_COMPILER_VERSION}" VERSION_GREATER_EQUAL 15)
+  set(CMAKE_EXE_LINKER_FLAGS "-latomic")
+endif()
+
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 set(BOOST_INCLUDE_LIBRARIES

scripts/setup-ubuntu.sh

@@ -48,7 +48,7 @@ function install_clang15 {
   fi
   CLANG_PACKAGE_LIST=clang-15
   if [[ ${VERSION} =~ "22.04" ]]; then
-    CLANG_PACKAGE_LIST=${CLANG_PACKAGE_LIST} gcc-12 g++-12 libc++-12-dev
+    CLANG_PACKAGE_LIST="${CLANG_PACKAGE_LIST} gcc-12 g++-12 libc++-12-dev"
   fi
   ${SUDO} apt install ${CLANG_PACKAGE_LIST} -y
 }