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

[Emil Velikov]

On 13 December 2016 at 16:19, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
> On Tue, Dec 13, 2016 at 11:14 AM, Emil Velikov <emil.l.velikov at gmail.com> wrote:
>> On 13 December 2016 at 16:09, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>>> On Tue, Dec 13, 2016 at 11:08 AM, Emil Velikov <emil.l.velikov at gmail.com> wrote:
>>>> On 13 December 2016 at 15:25, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>>>>> On Thu, Dec 8, 2016 at 2:21 PM, Emil Velikov <emil.l.velikov at gmail.com> wrote:
>>>>>> From: Emil Velikov <emil.velikov at collabora.com>
>>>>>>
>>>>>> Since day 1, Vulkan has depended on --with-egl-platforms to select the
>>>>>> platforms build.
>>>>>>
>>>>>> With earlier commits, we've attributed for that internally by renaming
>>>>>> the [internal] conditionals in our build. At the same time having the
>>>>>> --enable-egl and --with-egl-platforms dependency for Vulkan makes no
>>>>>> sense.
>>>>>>
>>>>>> Since where' on the bridge we want to make the conditional generic, thus
>>>>>> others (such as the gallium VL targets) can honour the respective
>>>>>> platforms.
>>>>>>
>>>>>> Cc: mesa-maintainers at lists.freedesktop.org
>>>>>> Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
>>>>>> ---
>>>>>> Should we keep the old configure and error out when anyone provides a
>>>>>> non-default value ? This way they'll have direct feedback how to move
>>>>>> forward. Otherwise they'll likely miss the warning message.
>>>>>
>>>>> I can't tell what problem this is solving. OTOH this is creating the
>>>>> problem that everyone's configure lines will need fixing.
>>>> This need fixing (builder intervention) either way, I'm afraid. Question is
>>>>  a) should we expect people to read the release notes, or
>>>>  b) get their attention with an error message, providing an example
>>>> in order to do the right thing.
>>>
>>> (c) leave things alone if this isn't fixing anything other than aesthetics.
>> It's not aesthetics... atm if you want just Vulkan you still need
>> --enable-egl --with-egl-platforms=x11,wayland*.
>> Otherwise it won't have any winsys integration... Not sure if it'll
>> build/link properly even :-(
>
> So error the build and say you don't support that configuration if you
> enable vulkan and don't enable any winsys stuff. Or make it so that
> --enable-egl sets the default value of --with-egl-platforms to
> whatever. Don't break everyone's builds, bisects, etc.
>
Sounds like you've not looked at the lovely stuff we have in there. I
welcome you to do so.

That aside:
Your suggestions contradict each other - on one hand you're saying
"error out" in a what is buggy yet valid usecase. On the other hand
you're against AC_MSG_ERROR since it will break X/Y usecase.

Also "everyone" is a mild overstatement, but I guess we all know that ;-)
Emil