On Wed, Dec 13, 2023 at 12:01 PM Ross Burton <ross.bur...@arm.com> wrote: > > On 6 Dec 2023, at 07:40, Johannes Pointner via lists.openembedded.org > <johannes.pointner=br-automation....@lists.openembedded.org> wrote: > > > > From: Johannes Pointner <johannes.point...@br-automation.com> > > > > If DISTRO_FEATURE usrmerge is enabled, SLIBDIR is just a symlink to LIBDIR. > > ldconfig-native uses hardcoded paths for SLIBDIR and LIBDIR that are fine > > for > > the not usrmerge case. But if usrmerge is enabled ldconfig-native generates > > a > > ld.so.cache, which is done in rootfs.py, that looks like this: > > 236 libs found in cache `/etc/ld.so.cache' > > libzstd.so.1 (libc6) => /lib/libzstd.so.1 > > libz.so.1 (libc6) => /lib/libz.so.1 > > libxtables.so.12 (libc6) => /lib/libxtables.so.12 > > libxslt.so.1 (libc6) => /lib/libxslt.so.1 > > libxml2.so.2 (libc6) => /lib/libxml2.so.2 > > > > This breaks for example the Qt QLibraryInfo paths if Qt is configured > > 'relocatable' and leads to the issue that the QtWebEngine can find the > > QtWebEngineProcess, Qt WebEngine resources,... > > > > Therefore don't let ldconfig-native parse SLIBDIR if it is a symlink. > > This still doesn’t explain *why* ldconfig is broken, why the workaround is a > yocto-specific fix in ldconfig and not a general fix that other distros have, > and why this isn’t a problem with Qt. As I wrote above ldconfig-native is broken for the usrmerge case because it uses hardcoded paths which are correct for the "not usrmerge case" but not for the "usrmerge case". Other distros as also the yocto ldconfig for the target system is configured at build time with the correct paths and works fine. This is an issue for Qt because it tries to determine the library locations using dladdr and this leads to incorrect paths that in my case broke QtWebEngine. > > Ross > >
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