Changqing Li schrieb am Fr 28. Feb, 10:56 (+0800):
> On 2/28/25 06:32, Jörg Sommer wrote:
> > ```
> > 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.
But you can't remove ldconfig if you need it. Why do you remove it?
If you want the ldconfig feature of python3-ctype, you have to enable
ldconfig. Or at least install the package.
Or should we downgrade the dependency to a recommendation?
> 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.
In our image python3-ctype works without ldconfig.
> > 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.
In our case python3-ctypes is a dependency of django.
> if revert my commit, and ldconfig is disabled in DISTRO_FEATURES, and
> python3-ctype is installed, ctypes.util.find_library will not work.
But then you need ldconfig. Either install it with IMAGE_INSTALL or include
it in DISTRO_FEATURES. I see this the same way like other DISTRO_FEATURES
for example pam: if you want to use pam with e.g. systemd you have to
include it in DISTRO_FEATURES.
Regards, Jörg
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