[Mesa-dev] [PATCH 06/28] configure: rename --with-{egl-, }platforms

[Emil Velikov]

On 13 December 2016 at 18:24, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
> On Tue, Dec 13, 2016 at 1:19 PM, Emil Velikov <emil.l.velikov at gmail.com> wrote:
>> On 13 December 2016 at 18:06, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>>> On Tue, Dec 13, 2016 at 12:33 PM, Emil Velikov <emil.l.velikov at gmail.com> wrote:
>>>> A workaround which just make to mind:
>>>>  - keep --with-egl-platforms around and it's heuristics (which will
>>>> also be applied for --with-platforms).
>>>>  - keep the --with-egl-platforms decisions for EGL only, and let one
>>>> override it via --with-platforms. Warn as the latter happens.
>>>>  - warn for the deprecation of --with-egl-platforms
>>>
>>> And really --with-platforms is --with-egl-platforms +
>>> --with-vulkan-platforms (which I realize doesn't presently exist).
>>>
>>> And the reason you don't want to add it is that you're afraid someone
>>> will do something like
>>>
>>> --with-egl-platforms=drm --with-vulkan-platforms=x11
>>>
>>> and it's a pain to make it so that EGL only has drm and vulkan only
>>> has x11? And eventually one might also want --with-vdpau-platforms,
>>> --with-vaapi-platforms, --with-whoknowswhat-platforms, and you don't
>>> want to keep adding them, since the chances that you *really* want
>>> those to be different for legitimate reasons is ... low.
>>>
>>> Is that right?
>>>
>> Precisely.
>>
>> If there is a legitimate reason, one can do a second mesa build... as
>> we do for DRI vs XLIB powered libGL, classic vs gallium OSMesa, etc.
>> Afacit having things configurable at such state is not supported by
>> either of the three build systems nor something that will scale - be
>> that from code or test POV.
>
> That all makes sense. I think that keeping --with-egl-platforms as a
> hidden option into eternity (or at least for a while until it becomes
> very unlikely to cross a bisect boundary) is my preferred solution,
> which sets the default value of --with-platforms. If you set both,
> then --with-platforms wins. And if you want to really be nice, warn
> about it.
>
> Is that roughly what you had in mind with your last suggestion?
>
Barring a "s/eternity/2-20 releases" - yes,. it's exactly what I was
thinking/talking about.

-Emil