Bug#1086735: libx11-6: buggy shlibs, libx11-xcb1 vs. libx11-6-udeb

[Cyril Brulebois]

Package: libx11-6
Version: 2:1.8.10-1
Severity: serious
Tags: d-i
Justification: broken shlibs, breaks udebs, etc.
X-Debbugs-Cc: debian-***@lists.debian.org

Hi,

[ Now turning the initial mail ping into a proper bug report. ]

Spotted via dose's reporting lots of uninstallable udebs on arm64: the
new shlibs for libx11-6 is broken, with various libx* packages now
depending on libx11-xcb1 (not a udeb).

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The new debian/rules has:

override_dh_makeshlibs:
dh_makeshlibs -a -plibx11-6 -V'libx11-6 (>= 2:1.6.0)' --add-udeb=libx11-6-udeb -- -c4
dh_makeshlibs -a -plibx11-xcb1 -V'libx11-xcb1' -- -c4
dh_makeshlibs -a -Nlibx11-6 -Nlibx11-xcb1 -- -c4

which leads to the following for libx11-6.shlibs (amd64):

libX11 6 libx11-xcb1
udeb: libX11 6 libx11-xcb1

Meanwhile, libx11-xcb1 has:

libX11-xcb 1 libx11-xcb1

which seems to match the intent in changelog.


Out of curiosity, pausing the build after the first dh_makeshlibs call,
the shlibs for libx11-6 is indeed correct at that point:

libX11 6 libx11-6 (>= 2:1.6.0)
udeb: libX11 6 libx11-6-udeb (>= 2:1.6.0)

and the second call is responsible for busting it up, since afterwards
it's amended to become what's found in the package:

libX11 6 libx11-xcb1
udeb: libX11 6 libx11-xcb1

So it looks like some confusion due to the -a/-p/-N combinations?


Going back to pausing between first and second dh_makeshlibs calls,
here's the slibs file for libx11-xcb1…

libX11-xcb 1 libx11-6 (>= 2:1.6.0)
udeb: libX11-xcb 1 libx11-6 (>= 2:1.6.0)

which convinces me the flag combinations aren't fine as they are.


Cheers,

[Julien Cristau]

Hi,
(Initially a mail/question to the X team as I wasn't entirely sure,
but the more I look at it, the more it looks like a serious bug in
src:libx11, nothing else.)

Indeed. Should be fixed in 2:1.8.10-2, thanks.

Cheers,
Julien