message: Update env commands in GitHub Actions
diff: @@ -83,12 +83,12 @@ jobs:
  sudo apt-get install libgl-dev libglu1-mesa-dev libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev libx11-dev
  if [ "${{ matrix.compiler }}" = "gcc" ]; then
  sudo apt-get install -y g++-${{ matrix.compiler_version }} g++-${{ matrix.compiler_version }}-multilib
  - echo "::set-env name=CC::gcc-${{ matrix.compiler_version }}"
  - echo "::set-env name=CXX::g++-${{ matrix.compiler_version }}"
  + echo "CC=gcc-${{ matrix.compiler_version }}" >> $GITHUB_ENV
  + echo "CXX=g++-${{ matrix.compiler_version }}" >> $GITHUB_ENV
  else
  sudo apt-get install -y clang-${{ matrix.compiler_version }} g++-multilib
  - echo "::set-env name=CC::clang-${{ matrix.compiler_version }}"
  - echo "::set-env name=CXX::clang++-${{ matrix.compiler_version }}"
  + echo "CC=clang-${{ matrix.compiler_version }}" >> $GITHUB_ENV
  + echo "CXX=clang++-${{ matrix.compiler_version }}" >> $GITHUB_ENV
  fi
  - name: Install Dependencies (MacOS)
  @@ -97,13 +97,13 @@ jobs:
  brew install cmake ninja
  if [ "${{ matrix.compiler }}" = "gcc" ]; then
  brew install gcc@${{ matrix.compiler_version }}
  - echo "::set-env name=CC::gcc-${{ matrix.compiler_version }}"
  - echo "::set-env name=CXX::g++-${{ matrix.compiler_version }}"
  + echo "CC=gcc-${{ matrix.compiler_version }}" >> $GITHUB_ENV
  + echo "CXX=g++-${{ matrix.compiler_version }}" >> $GITHUB_ENV
  else
  ls -ls /Applications/
  sudo xcode-select -switch /Applications/Xcode_${{ matrix.compiler_version }}.app
  - echo "::set-env name=CC::clang"
  - echo "::set-env name=CXX::clang++"
  + echo "CC=clang" >> $GITHUB_ENV
  + echo "CXX=clang++" >> $GITHUB_ENV
  fi
  - name: Install Python ${{ matrix.python }}
  