[ccache] Speeding up builds with clang-tidy, clang-analyzer and iwyu

[Joel Rosdahl]

On Sun, 2 Aug 2020 at 18:55, Christian Ledergerber via ccache
<ccache at lists.samba.org> wrote:
> [...]
> To me it seems like the following should work:
>
> 1. try to use ccache
>
> 2. if no hit:
>
> - run clang-tidy
>
> - run clang
>
> For this I would need to know whether ccache generated a hit - lets say
> as return code of the executable.

I don't think there's a good way of accomplishing this without adding
code to ccache to optionally exit with failure on a cache miss. But it
would be easy to add it.

Regards,
Joel