usefulness of use_system_mesa=1 option

[Paweł Hajdan, Jr.]

I started thinking a lot about usefulness of use_system_mesa=1 gyp option.

It seems nobody except Gentoo uses it, it only works on 64-bit x86-based architectures (and is known to be broken on ARM and 32-bit x86, https://bugs.gentoo.org/show_bug.cgi?id=457130), and has annoying problems with new versions of mesa like https://bugs.gentoo.org/show_bug.cgi?id=475444 .

Note that it's not about annoying bugs, but whether this makes sense at all. While use_system_mesa=1 makes the build system use system headers, dlopen is still used, and it can load either libGL.so, or libGLESv2.so, or libEGL.so. There are a lot of assumptions about function signatures in the Chromium mesa bindings anyway, so I'm not sure how much trying to use system headers actually helps. :-/

You can see the following chromium-dev threads for some context:

https://groups.google.com/a/chromium.org/d/msg/chromium-dev/o0qIVudjoSI/TAVEoGu1vXcJ

https://groups.google.com/a/chromium.org/d/msg/chromium-dev/t5WoXlL9jEE/0nyzqlAyPfUJ

I'm looking for feedback whether this has any chance of being useful (at this point I probably wouldn't have cycles to work on it though), or a confirmation that it doesn't make sense.

My current plan is to start removing support for this build option.

Paweł

[Elan Ruusamäe]

pld uses it too :)

no comments on usefulness altho.

-- 

glen

Paweł

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[Paweł Hajdan, Jr.]

On Tue, Aug 6, 2013 at 2:29 AM, Elan Ruusamäe <gl...@delfi.ee> wrote:

pld uses it too :)

no comments on usefulness altho.

Alright, I removed it: https://codereview.chromium.org/22218003/

If anyone is interested in getting this to work well, feel free to start a discussion on this list.

Paweł

 

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