Bug 310823

Summary:	[x11 overlay] media-libs/mesa-9999: misleading USE=gallium
Product:	Gentoo Linux	Reporter:	Thomas Capricelli <orzel>
Component:	Current packages	Assignee:	Gentoo X packagers <x11>
Status:	RESOLVED FIXED
Severity:	normal	CC:	Adrian.Bassett
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Thomas Capricelli 2010-03-23 04:21:59 UTC

What USE=gallium currently does is to add the --enable-gallium flag to configure for misc packages (typically xf86-video-ati). I did that and checked that my x was using gallium...... which is not. 

The reason is the following : with current git trees, the gallium drivers are built, but not installed. People use LIBGL_DRIVERS_PATH to try it.

(on irc:) 
[05:03] <airlied> orzel: gallium doesn't get installed or used by default
[05:06] <airlied> orzel: generally we just use LIBGL_DRIVERS_PATH to pick the gallium driver

So my understanding is that current live ebuilds actually build the gallium stuff somewhere, but do not install it and wipe the build directory.. and there is now way to test the gallium drivers in gentoo.

I dont know about non-live ebuilds, i have not checked them.

Reproducible: Always

Comment 1 Thomas Capricelli 2010-03-23 04:46:26 UTC

Here is some more information from irc:

[05:27] Just copy or symlink radeong_dri.so to r300_dri.so and point LIBGL_DRIVERS_PATH to that folder.

Comment 2 Rémi Cardona (RETIRED) gentoo-dev

2010-03-23 15:49:09 UTC

Yeah, we've churned USE flags a lot on mesa in the overlay and we're still not quite sure where we want to go.

As for gallium, we used to provide a USE flag for it which never actually did anything since libGL never looks for gallium drivers...

Maybe we should always build gallium drivers and use eselect-opengl to enable them? Food for thoughts...

In any case, that's not the biggest priority ATM. Thanks for the bug report nonetheless.

Cheers

Comment 3 Chí-Thanh Christopher Nguyễn gentoo-dev

2010-08-26 13:01:59 UTC

This is fixed by eselect-mesa, now that gallium is used by default if USE="-classic" is set. If both classic and gallium USE flags are enabled, you can switch with eselect mesa.