RE: variable expansion. Where are you assigning OPKGLIBDIR its new value? If it
is in an opkg bbappends in your own layer, I wonder if the bbappends is not
being parsed during rootfs creation.
RE: the partitions. Hmm, yeah. I agree that it probably isn't sensible to
expect the opkg state information to be placed into /data-os during rootfs
creation.
Does your usecase support running opkg at runtime? If not, you might just
accept that the state information stays on the read-only partition.
If runtime opkg operations are supported, you might make a one-time initscript
that runs on first-boot and moves the sstate information to /data-os.
Sorry if my emails are strangely formatted by the way. I'm in a weird temporary
email setup.
---
Alex Stewart
Software Engineer. PR&D Security, RTOS.
T&M, Emerson Electric Corp. (NI)
________________________________________
From: yocto@lists.yoctoproject.org <yocto@lists.yoctoproject.org> on behalf of
Martin Siegumfeldt <m...@gomspace.com>
Sent: Wednesday, September 18, 2024 04:39
To: Stewart, Alex; yocto@lists.yoctoproject.org
Subject: [EXTERNAL] Re: [yocto] read-only-rootfs and opkg
Hi Alex, Thanks for your input - highly appreciated. It appears you have a
point regarding the variable assignment - 'bitbake-getvar OPKGLIBDIR' indeed
indicates the intended assignment does not occur: $ bitbake-getvar --value
OPKGLIBDIR NOTE:
Hi Alex,
Thanks for your input - highly appreciated.
It appears you have a point regarding the variable assignment - 'bitbake-getvar
OPKGLIBDIR' indeed indicates the intended assignment does not occur:
$ bitbake-getvar --value OPKGLIBDIR
NOTE: Starting bitbake server...
/var/lib
Doing the strong assignment (OPKGLIBDIR = "/data-os/opkg") does not make a
difference, which puzzles me as all assigments (I am able to grep) are weak:
$ rg ^OPKGLIBDIR
meta/classes-recipe/rootfs_ipk.bbclass
30:OPKGLIBDIR ??= "${localstatedir}/lib"
meta/recipes-devtools/opkg/opkg_0.6.1.bb
32:OPKGLIBDIR ??= "${target_localstatedir}/lib"
meta/classes-global/package_ipk.bbclass
24:OPKGLIBDIR ??= "${localstatedir}/lib"
However, based on your reply, I am starting to wonder whether what I am trying
to achieve is at all possible. The mount '/data-os' is a dedicated partition
mounted R/W and used by overlayfs-etc, my assumption was to configure opkg to
use this for the meta-data. But if the meta-data is rendered build-time during
rootfs creation, I do not see how this is achievable?
Thanks,
Martin
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