[Mesa-dev] [PATCH] Don't set defaults for gallium and dri drivers

[Matt Turner]

On Mon, Jan 23, 2012 at 9:28 AM, Jakob Bornecrantz <jakob at vmware.com> wrote:
> ----- Original Message -----
>> If you're building mesa, you know what drivers you want.
>
> NACK, the default should be build as much as possible.

We don't build OpenVG, OSMesa, i915g, GLESv1, GLESv2, and a number of
Gallium state trackers by default.

And while having reasonable defaults for components like EGL and GLES
makes sense, having default drivers doesn't. I think we can roughly
split people who build mesa into two groups:
- developers & users
- distro packagers

Developers and users are going to be building for a particular system
with a single graphics card, so almost always they're going to have to
disable either DRI or Gallium drivers. The current default doesn't
work for them.

Distro packagers are either going to build everything they can, or
offer knobs for users to select what they want to build. In the case
of the former, they're not going to depend on our configure script to
tell them what to build, because we already know it doesn't build
everything.

Neither group is served well by selecting a bunch of drivers when none
are requested.

I hope my reasoning is clear now.

> The proper fix here is to merge --with-dri-drivers and
> --with-gallium-drivers, and have it figure with gallium/dri
> drivers to turn based on that list, so:
>
> --with-awesome-new-option=dri-vmwgfx,dri-i965
>
> would build gallium, st/mesa, svga, mesa-core and i965 while:
>
> --with-awesome-new-option=dri-i965
>
> would only build mesa-core and i965.

Perhaps, although I'd be mostly satisfied with the current patch. I'll
work on that after the current patch.

Matt