Re: [Mesa-dev] [RFC libdrm 0/2] Replace the build system with meson

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On Thu, Mar 23, 2017 at 4:56 PM, Dylan Baker <dylan@xxxxxxxxxxxxx> wrote:
> Quoting Colin Cross (2017-03-23 15:14:16)
>> On Thu, Mar 23, 2017 at 2:56 PM, Greg Hackmann <ghackmann@xxxxxxxxxx> wrote:
>> > On 03/22/2017 02:48 PM, Rob Clark wrote:
>> >>
>> >> On Wed, Mar 22, 2017 at 4:10 PM, Dylan Baker <dylan@xxxxxxxxxxxxx> wrote:
>> >>>
>> >>> Quoting Rob Clark (2017-03-22 10:07:54)
>> >>>>
>> >>>> I guess an interesting question (from someone who doesn't know meson
>> >>>> yet) would be whether meson could slurp in the Makefile.sources type
>> >>>> stuff that we have, which are shared so far between
>> >>>> android/scons/autotools (and for the most part, kept developers from
>> >>>> having to care *too* much about the different build systems)
>> >>>
>> >>>
>> >>> Jason and I have talked about that too. I'd suggested that we could write
>> >>> a
>> >>> module for meson to read makefile.sources (since we're surely not the
>> >>> only
>> >>> project that would benefit from such a module), except that android is
>> >>> moving to
>> >>> blueprint[1] instead of android.mk files. As far as I can tell blueprint
>> >>> doesn't
>> >>> support using makefile.sources, so it seems somewhat moot in a world of
>> >>> blueprint for android, meson for *.
>> >>
>> >>
>> >> I guess even if it is only a temporary thing, something that could
>> >> slurp in Makefile.sources seems like it would be useful for a
>> >> transition period.
>> >>
>> >> I'm not totally up to speed on android/blueprint stuff.. but even some
>> >> simplified or different "here-are-my-sources" type file that could be
>> >> shared across build systems would be useful.  Meson sounds a bit more
>> >> extensible so maybe there is some potential to adapt to whatever
>> >> android forces on us ;-)
>> >
>> >
>> > +ccross from the Android build team can hopefully provide some input here.
>>
>> For cases like this, we generally add a python script that translates
>> the build files into something Blueprint understands, and rerun it
>> each time we import into the project.
>>
>> Alternatively, Blueprint efficiently supports globbing for sources, so
>> if all the source files are always listed in Makefile.sources (which
>> seems to be true in our copy of libdrm except for intel/test_decode.c)
>> then we could use globs and ignore the makefiles, possibly manually
>> excluding a few files.
>
> I'm hoping you can clarify a couple of questions I have about blueprint:
> 1) android is moving to blueprint from android.mk files?

Yes, in a phased transition.  We support both for now.

> 2) is there a publicly available project that uses blueprint I could look at?
>    The documentation I've been able to find is pretty sparse.

Blueprint is a framework for writing build systems, and Soong is
AOSP's Blueprint build system.  See
https://android.googlesource.com/platform/build/soong/+/master/README.md
for documentation on Soong.
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