add g++-6 to ubuntu-14.04 (#1144)

* add g++-6 to ubuntu-14.04

* fix syntax

* fix yamllint errors for build-and-test

* fix 'add-apt-repository' command not found

* make 'run tests' explicit

* enable testing and run both release and debug

* oops

.github/workflows/build-and-test.yml

@@ -2,12 +2,13 @@ name: build-and-test
 
 on:
   push:
-    branches: [ master ]
+    branches: [master]
   pull_request:
-    branches: [ master ]
+    branches: [master]
 
 jobs:
-  # TODO: add 32-bit builds (g++ and clang++) for ubuntu (requires g++-multilib and libc6:i386)
+  # TODO: add 32-bit builds (g++ and clang++) for ubuntu
+  #   (requires g++-multilib and libc6:i386)
   # TODO: add coverage build (requires lcov)
   # TODO: add clang + libc++ builds for ubuntu
   # TODO: add clang + ubsan/asan/msan + libc++ builds for ubuntu
@@ -28,30 +29,30 @@ jobs:
             os: windows-latest
             build_type: 'Debug'
     steps:
-    - uses: actions/checkout@v2
+      - uses: actions/checkout@v2
 
-    - name: create build environment
-      run: cmake -E make_directory ${{ runner.workspace }}/_build
+      - name: create build environment
+        run: cmake -E make_directory ${{ runner.workspace }}/_build
 
-    - name: configure cmake
-      env:
-        CXX: ${{ matrix.compiler }}
-      shell: bash
-      working-directory: ${{ runner.workspace }}/_build
-      run: >
-        cmake $GITHUB_WORKSPACE
-        -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON
-        -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
+      - name: configure cmake
+        env:
+          CXX: ${{ matrix.compiler }}
+        shell: bash
+        working-directory: ${{ runner.workspace }}/_build
+        run: >
+          cmake $GITHUB_WORKSPACE
+          -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON
+          -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
 
-    - name: build
-      shell: bash
-      working-directory: ${{ runner.workspace }}/_build
-      run: cmake --build . --config ${{ matrix.build_type }}
+      - name: build
+        shell: bash
+        working-directory: ${{ runner.workspace }}/_build
+        run: cmake --build . --config ${{ matrix.build_type }}
 
-    - name: test
-      shell: bash
-      working-directory: ${{ runner.workspace }}/_build
-      run: ctest -C ${{ matrix.build_type }} -VV
+      - name: test
+        shell: bash
+        working-directory: ${{ runner.workspace }}/_build
+        run: ctest -C ${{ matrix.build_type }} -VV
 
   # TODO: add compiler g++-6 to ubuntu-14.04 job
   # TODO: enable testing for g++-6 compiler
@@ -63,34 +64,51 @@ jobs:
       matrix:
         build_type: ['Release', 'Debug']
         compiler: [g++-4.8, clang++-3.6]
+        include:
+          - compiler: g++-6
+            build_type: 'Debug'
+            run_tests: true
+          - compiler: g++-6
+            build_type: 'Release'
+            run_tests: true
     container: ubuntu:14.04
     steps:
-    - uses: actions/checkout@v2
+      - uses: actions/checkout@v2
 
-    - name: install required bits
-      run: sudo apt update && sudo apt -y install clang-3.6 cmake3 g++-4.8 git
+      - name: install required bits
+        run: |
+          sudo apt update
+          sudo apt -y install clang-3.6 cmake3 g++-4.8 git
 
-    - name: create build environment
-      run: cmake -E make_directory $GITHUB_WORKSPACE/_build
+      - name: install other bits
+        if: ${{ matrix.compiler }} == g++-6
+        run: |
+          sudo apt -y install software-properties-common
+          sudo add-apt-repository -y "ppa:ubuntu-toolchain-r/test"
+          sudo apt update
+          sudo apt -y install g++-6
 
-    - name: configure cmake
-      env:
-        CXX: ${{ matrix.compiler }}
-      shell: bash
-      working-directory: ${{ github.workspace }}/_build
-      run: >
-        cmake $GITHUB_WORKSPACE
-        -DBENCHMARK_ENABLE_TESTING=off
-        -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
-        #-DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON
+      - name: create build environment
+        run: cmake -E make_directory $GITHUB_WORKSPACE/_build
 
-    - name: build
-      shell: bash
-      working-directory: ${{ github.workspace }}/_build
-      run: cmake --build . --config ${{ matrix.build_type }}
+      - name: configure cmake
+        env:
+          CXX: ${{ matrix.compiler }}
+        shell: bash
+        working-directory: ${{ github.workspace }}/_build
+        run: >
+          cmake $GITHUB_WORKSPACE
+          -DBENCHMARK_ENABLE_TESTING=${{ matrix.run_tests }}
+          -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
+          -DBENCHMARK_DOWNLOAD_DEPENDENCIES=${{ matrix.run_tests }}
 
-      # - name: test
-      #   shell: bash
-      #   working-directory: ${{ github.workspace }}/_build
-      #   run: ctest -C ${{ matrix.build_type }} -VV
+      - name: build
+        shell: bash
+        working-directory: ${{ github.workspace }}/_build
+        run: cmake --build . --config ${{ matrix.build_type }}
 
+      - name: test
+        if: ${{ matrix.run_tests }}
+        shell: bash
+        working-directory: ${{ github.workspace }}/_build
+        run: ctest -C ${{ matrix.build_type }} -VV