Merge pull request #3783 from shrijitsingh99/matrix-ci

Simplify Ubuntu CI using matrix strategy

.ci/azure-pipelines/build-ubuntu-19-10.yaml → .ci/azure-pipelines/build-ubuntu.yaml

@@ -1,22 +1,46 @@
 resources:
   containers:
+    - container: env1604
+      image: pointcloudlibrary/env:16.04
     - container: env1910
       image: pointcloudlibrary/env:19.10
 
 jobs:
-  - job: ubuntu1910
-    displayName: Ubuntu 19.10
-    timeoutInMinutes: 0
+  - job: ubuntu
+    displayName: Ubuntu
     pool:
       vmImage: 'Ubuntu 16.04'
-    container: env1910
+    timeoutInMinutes: 0
+    strategy:
+      matrix:
+#        16.04 Clang:
+#          containerResource: env1604
+#          CC: clang
+#          CXX: clang++
+#          CMakeArgs: '-DPCL_WARNINGS_ARE_ERRORS=ON'
+#        19.10 Clang:
+#          containerResource: env1910
+#          CC: clang
+#          CXX: clang++
+#          CMakeArgs: ''
+        16.04 GCC:
+          containerResource: env1604
+          CC: gcc
+          CXX: g++
+          CMakeArgs: '-DPCL_WARNINGS_ARE_ERRORS=ON'
+        19.10 GCC:
+          containerResource: env1910
+          CC: gcc
+          CXX: g++
+          CMakeArgs: ''
+    container: $[ variables['containerResource'] ]
     variables:
       BUILD_DIR: '$(Agent.BuildDirectory)/build'
       CMAKE_CXX_FLAGS: '-Wall -Wextra -O2'
     steps:
       - script: |
           mkdir $BUILD_DIR && cd $BUILD_DIR
-          cmake $(Build.SourcesDirectory) \
+          cmake $(Build.SourcesDirectory) $(CMakeArgs) \
             -DCMAKE_BUILD_TYPE="Release" \
             -DCMAKE_CXX_FLAGS="$CMAKE_CXX_FLAGS" \
             -DPCL_ONLY_CORE_POINT_TYPES=ON \

.dev/docker/env/Dockerfile

@@ -18,6 +18,7 @@ RUN apt-get update \
  && apt-get install -y \
       cmake \
       g++ \
+      clang \
       wget \
       libboost-date-time-dev \
       libboost-filesystem-dev \