1 |
On Saturday 03 of April 2010 14:16:14 Fabian Groffen wrote: |
2 |
> Shouldn't we fix that buildsystem then? Do you have an example of a |
3 |
> package/buildsystem that does that? |
4 |
"We" already do, the thing is that maybe we don't have to. |
5 |
https://bugs.gentoo.org/show_bug.cgi?id=240323 |
6 |
From top of my head: python having issues with sys-libs/db as well as some |
7 |
packages with readline. |
8 |
|
9 |
> > It would indeed. Now when I think about it, moving stuff to preserved |
10 |
> > library dir could be just done - provided it's possible - along with |
11 |
> > fixing/setting DT_RPATH's in reverse runtime dependencies. This way no |
12 |
> > system-wide LIBRARY_PATH's would be necessary. |
13 |
> > Is it possible? Mike? |
14 |
> No, unless you somehow make sure you reserve space for this, by e.g. |
15 |
> setting a bogus rpath entry at buildtime. If you want to go that route, |
16 |
> you probably want to look at the Prefix' binutils-config wrapper that |
17 |
> already calls the linker with added rpath arguments. Afterwards you can |
18 |
> use chrpath to set it to the correct location. Will get messy with the |
19 |
> vdb though, but if Portage's doing it, it can probably be dealt with. |
20 |
Sounds messy indeed, what about hardened/SELinux/AppArmor/whatever - do they |
21 |
allow such DT_RPATH operations? It should be probably also restricted for |
22 |
binary-only packages. |
23 |
|
24 |
On Saturday 03 of April 2010 20:51:43 Tiziano Müller wrote: |
25 |
> Don't fix the hack. Remove the preserve libs "feature", make the PMs |
26 |
> check for rdeps per default before unmerging things. |
27 |
This will only prevent creating orphans of uninstalled libraries, what about |
28 |
upgraded ones when SOVERSION has been bumped (the most common case)? Besides I |
29 |
can already imagine PMS-related discussion regarding "make the PMs check for |
30 |
rdeps per default before unmerging things" - thx but no thx. |
31 |
|
32 |
> Slot libraries where needed, slot dep operators (EAPI 4) will help. |
33 |
Again, you suggest to SLOT every library that happened to bump SOVERSION. It's |
34 |
unrealistic. Besides library should be slotted when it's API changes, for |
35 |
source based distributions it's not needed for ABI changes - let's not confuse |
36 |
those two. Also excessive slotting increases probability of breaking library |
37 |
discovery mechanisms in various build systems (not everyone uses pkg-config). |
38 |
|
39 |
> And if that doesn't work out we need a separate var to give the PM a hint |
40 |
when API/ABI breakages happen (such that the PM knows when to re-install the |
41 |
rev deps). |
42 |
It needs PMS amended and thus GLEP. Please submit a GLEP item for this if you |
43 |
see it fit. |
44 |
Anyway, as explained in OT, it's not a problem of package manager dependencies |
45 |
system but issue with broken/not smart build systems - no dependency tree |
46 |
magic will solve this issue. |
47 |
|
48 |
-- |
49 |
regards |
50 |
MM |