Is there any problem to install ninja too

[ClausKlein]

Ninja is a small build system with a focus on speed. https://ninja-build.org/

It can be used with cmake -B ../build -G Ninja -S $PWD

And is much faster than make!

[maxim-lobanov]

Already discussed in #514 and #741
Considering pretty quick installation in runtime and existing of GitHub community tasks to install in runtime, we don't have plans to bake this tool into images.

[ClausKlein]

Exist there a better solution?

    runs-on: ${{ matrix.os }}
    strategy:
        matrix:
            os: [macos-latest, ubuntu-20.04]

    steps:
    - uses: actions/checkout@v2

    - name: Add nina to Build Environment
      shell: bash
      run: test $OSTYPE != "darwin19" && sudo apt-get install ninja-build || brew install ninja

[maxim-lobanov]

I suggest trying communication action Install ninja-build tool
It install ninja to Hosted images and takes about 1-2 seconds.

[ClausKlein]

Most cmake projects would build much faster with ninja than with make, even on a single CPU system !