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Bug 250020 - emerge updates packages in PDEPEND first
Summary: emerge updates packages in PDEPEND first
Alias: None
Product: Portage Development
Classification: Unclassified
Component: Core (show other bugs)
Hardware: All Linux
: High normal (vote)
Assignee: Portage team
Keywords: InVCS
Depends on:
Blocks: 155723 210077 256841 261265 261959
  Show dependency tree
Reported: 2008-12-06 11:42 UTC by Rémi Cardona (RETIRED)
Modified: 2009-03-13 20:40 UTC (History)
2 users (show)

See Also:
Package list:
Runtime testing required: ---

fix sub-optimal merge order (merge_order.patch,2.80 KB, patch)
2009-02-02 01:18 UTC, Zac Medico
Details | Diff

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Description Rémi Cardona (RETIRED) gentoo-dev 2008-12-06 11:42:01 UTC
Ok, here's the situation (all ebuilds in question are in the x11 overlay)

x11-base/xorg-server-1.5.3 has this atom in PDEPEND only :

input_devices_evdev? ( >=x11-drivers/xf86-input-evdev-2.1.0 )

Now, on my test system, here's what portage tells me :

# emerge -1 xorg-server -p

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild     U ] x11-drivers/xf86-input-evdev-2.1.0 [2.0.7] 
[ebuild   R   ] x11-base/xorg-server-1.5.3  USE="-tslib%" INPUT_DEVICES="-tslib%" 

Shouldn't the order be reversed? Am I missing something?

Feel free to slap me silly if this is not a bug :)

Comment 1 Rémi Cardona (RETIRED) gentoo-dev 2008-12-06 11:42:37 UTC
better summary...
Comment 2 Zac Medico gentoo-dev 2008-12-06 19:11:08 UTC
It makes PDEPEND more useful if it behaves more like RDEPEND, for cases like bug #180045. However, for the particular case that you've given, it's certainly more optimal to merge xorg-server first since xf86-input-evdev has xorg-server in DEPEND.
Comment 3 Rémi Cardona (RETIRED) gentoo-dev 2009-01-19 14:16:30 UTC
Zac, any updates on this? I'm currently planning to stabilize xorg to 1.5.3-r1 from If users have to rebuild/update their drivers only once, that would save us from major bug spam.

Cheers :)
Comment 4 Zac Medico gentoo-dev 2009-01-19 19:13:03 UTC
I need to try and reproduce the case reported in comment #0 because there's already some code to account for cases like this and I'm not sure why the order didn't come out more optimal.

As for the 1.3.x to 1.5.x upgrade, this issue can only affect drivers which are compatible with both 1.3.x and 1.5.x. For example, it won't affect xf86-input-evdev upgrades since this driver typically requires an xorg-server version >1.3.x in DEPEND. This is different from the case reported in comment #0, where xorg-server-1.5.x already happened to be installed (and thus the build time dependency was already satisfied).
Comment 5 Zac Medico gentoo-dev 2009-02-02 01:18:58 UTC
Created attachment 180634 [details, diff]
fix sub-optimal merge order

If this patch is saved as /tmp/merge_order.patch, then it can be applied as follows:

 patch /usr/lib/portage/pym/_emerge/ /tmp/merge_order.patch
Comment 6 Zac Medico gentoo-dev 2009-02-02 01:35:20 UTC
The attached patch fixes some similar cases, but not the one reported in comment #0. There's still a remaining issue...
Comment 7 Zac Medico gentoo-dev 2009-02-14 22:11:22 UTC
This is fixed in svn r12612. The changes to the merge order algorithm should also account for many common cases of bug #199856, but does not necessarily solve all possible cases of that bug.
Comment 8 Zac Medico gentoo-dev 2009-03-10 09:26:32 UTC
This is fixed in 2.2_rc24 which is in package.mask. I'll close this bug when it's also released in
Comment 9 Zac Medico gentoo-dev 2009-03-13 20:40:04 UTC
This is released in