Run 'gcc' job from linux workflow also on g++-11

Author: danielkrupinski

.github/workflows/linux.yml

@@ -7,13 +7,17 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
+        compiler: [g++-10, g++-11]
         configuration: [Debug, Release]
     steps:
     - uses: actions/checkout@v2
+    - name: Add toolchain PPA
+      if: matrix.compiler == 'g++-11'
+      run: sudo add-apt-repository ppa:ubuntu-toolchain-r/test
     - name: install
-      run: sudo apt-get update && sudo apt-get install -y libsdl2-dev gcc-10 g++-10
+      run: sudo apt-get update && sudo apt-get install -y libsdl2-dev ${{ matrix.compiler }}
     - name: configure
-      run: CC=gcc-10 CXX=g++-10 cmake -D BUILD_TESTS=1 -D CMAKE_BUILD_TYPE=${{ matrix.configuration }} -S . -B ${{ matrix.configuration }}
+      run: CC=gcc-10 CXX=${{ matrix.compiler }} cmake -D BUILD_TESTS=1 -D CMAKE_BUILD_TYPE=${{ matrix.configuration }} -S . -B ${{ matrix.configuration }}
     - name: build
       run: cd ${{ matrix.configuration }} && make -j $(nproc --all)
     - name: run unit tests