[Mesa-dev] [PATCH 2/2] meson: make "auto" only choose buildable drivers

[Matt Turner]

On Thu, Jul 18, 2019 at 7:19 AM Alyssa Ross <hi at alyssa.is> wrote:
>
> "auto" pays attention to the OS and architecture of the target system,
> but not the available libraries. If, say, libdrm isn't available, "auto"
> won't work, and a manual list of drivers will be required anyway. It
> would also try building the virgl and svga gallium drivers, even when
> unsupported due to building with EGL and no compatible platform.

Today with "auto" you'll get some error message if a driver cannot be
built because of a missing library, right?

What happens after your patch? Is the user informed that some driver
included in the "auto" set is not going to be built because of a
missing library? It doesn't seem like it, unless I'm missing
something, and that seems potentially worse than giving an error.

I think automatic selection of build targets really breaks down when
you have as many options and dependencies as we have.