** Also affects: lxc (Ubuntu Noble)
Importance: Undecided
Status: Confirmed
** Also affects: lxc (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: lxc (Ubuntu Mantic)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2039873
Title:
liblxc-dev was built with LXC_DEVEL=1 in Ubuntu 22.04 and later
releases
Status in lxc package in Ubuntu:
Confirmed
Status in lxc source package in Jammy:
New
Status in lxc source package in Mantic:
New
Status in lxc source package in Noble:
Confirmed
Bug description:
[ Impact ]
LXC 5.0.0 was built with LXC_DEVEL=1 set for Jammy. But for release
build we should have LXC_DEVEL=0.
LXC_DEVEL is a variable that appears in the /usr/include/lxc/version.h
and then can be (and actually it is) used by other projects to detect
if liblxc-dev is a development build or stable.
Having LXC_DEVEL=1 makes problems for the users who want to build projects
those are depend on liblxc
from source (for example, LXD, go-lxc:
https://github.com/canonical/lxd/pull/12420).
Q: Why it was not a problem for so long?
A: Because LXC API was stable for a long time, but recently we have extended
liblxc API (https://github.com/lxc/lxc/pull/4260) and dependant package go-lxc
was updated too (https://github.com/lxc/go-lxc/pull/166).
This change was developed properly to be backward compatible with the old
versions of liblxc. But, there is a problem. If LXC_DEVEL=1 then the macro
check VERSION_AT_LEAST
(https://github.com/lxc/go-lxc/blob/ccae595aa49e779f7ecc9250329967aa546acd31/lxc-binding.h#L7)
is disabled. That's why we should *not* have LXC_DEVEL=1 for *any* release
build of LXC.
[ Test Plan ]
Install liblxc-dev package and check /usr/include/lxc/version.h file
LXC_DEVEL should be 0
[ Where problems could occur ]
Theoretically, build of a software which depends on liblxc-dev may start to
fail
if it assumes that LXC_DEVEL is 1.
[ Other Info ]
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