On 2/28/25 06:32, Jörg Sommer wrote:
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Changqing Li schrieb am Di 25. Feb, 10:02 (+0800):
On 2/25/25 07:36, Jörg Sommer wrote:
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Changqing Li via lists.openembedded.org schrieb am Do 20. Feb, 11:57 (+0800):
The reverted commit causes regression when ldconfig not in
DISTRO_FEATURES, before, without ldconfig in DISTRO_FEATURES,
ctypes.util.find_library(name) can find the lib if it is installed,
Hello Changqing Li,
Did I understand correctly that gtk+3 was found before, indent of ldconfig
was in der DISTRO_FEATURES? But after the change, if fails.
Where is libgdk installed? In /usr/lib or somewhere else?
Hi,
libgtk is under /usr/lib. See:
root@qemux86-64:~# ldconfig -p | grep gtk-3
libgtk-3.so.0 (libc6,x86-64) => /usr/lib/libgtk-3.so.0
root@qemux86-64:~# python3
Python 3.13.2 (main, Feb 4 2025, 14:51:09) [GCC 14.2.0] on linux Type
"help", "copyright", "credits" or "license" for more information.
from ctypes.util import find_library
find_library('gtk-3')
'libgtk-3.so.0'
I have reverted your patch and this works:
```
root@qemux86-64:~# python3 -c 'from ctypes.util import find_library;
print(find_library("m"))'
libm.so.6
root@qemux86-64:~# python3 -c 'from ctypes.util import find_library;
print(find_library("gtk-3"))'
libgtk-3.so.0
root@qemux86-64:~# ldconfig --version
ldconfig (GNU libc) 2.41
Copyright (C) 2024 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Andreas Jaeger.
```
Here are my settings from local.conf:
```
EXTRA_IMAGE_FEATURES += "\
allow-empty-password allow-root-login empty-root-password \
ssh-server-openssh tools-debug \
"
INIT_MANAGER = "systemd"
DISTRO_FEATURES:append = " usrmerge"
IMAGE_INSTALL:append = " conserver-ptest"
PACKAGECONFIG:append:pn-systemd = " coredump"
IMAGE_INSTALL:append = " python3-ctypes gtk+3"
MACHINE ??= "qemux86-64"
DISTRO ??= "poky"
```
I have used poky with 40b5f61a8f and the revert and meta-openembedded with
0b83551ff2.
This works because poky have ldconfig in DISTRO_FEATURES by default,
https://git.yoctoproject.org/poky/tree/meta/conf/bitbake.conf#n933
if remove ldconfig from DISTRO_FEATURES in local.conf, it will not work.
For the case that ldconfig is NOT in DISTRO_FEATURES, gtk+3 can be found.
After commit "python3-ctypes: depend on ldconfig only if distro-feature set"
is merged,
ldconfig is not installed, so ctypes.util.find_library cannot found gtk+3.
You can also install ld or gcc. But if you prefer ldconfig, you should set
this DISTRO_FEATURES. It's like x11 support, if you want it you have to set
the feature.
ctypes.util.find_library need ldconfig or ld or gcc to work. No matter
what the DISTRO_FEATURES is, we should make a package at least work once
it is installed.
python3-ctypes need rdepend at least one of ld, ldconfig, gcc, it should
be a hard dependency.
certainly，it doesn't have to be ldconfig. I am not sure depends on
binutils or gcc it better, since binutils and gcc are more big packges.
Quotinghttps://docs.yoctoproject.org/ref-manual/features.html:
| ldconfig: Include support for ldconfig and ld.so.conf on the target.
@Mathieu: I think you should revert the commit 0df1318e5c, because it pulls
in ldconfig even it is unselected in DISTRO_FEATURES. It leaves no way to
build without ldconfig (what was the intend of my commit).
when ldconfig is disabled in DISTRO_FEATURES, if we don't want ldconfig
be pulled in, how about just not install the package that depend on
ldconfig, eg: python3-ctypes.
if revert my commit, and ldconfig is disabled in DISTRO_FEATURES, and
python3-ctype is installed, ctypes.util.find_library will not work.
I tried with my commit in oe-core, and
DISTRO_FEATURES_BACKFILL_CONSIDERED += "ldconfig" in local.conf:
boot core-image-minimal, ldconfig is not pulled.
root@qemux86-64:~# ldconfig --version -sh: ldconfig: command not found
root@qemux86-64:~#
Regards
Changqing
Kind regards, Jörg
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