(Replying to your penultimate message, but you seem to be on track now: the last output you gave for 'ldd /usr/lib/qt5/bin/lrelease | grep -F libQt5Core.so.5' looks good.)
First, it's ldconfig with the letter L, but you normally don't need to run it yourself (library packages automatically do it when you install or upgrade them). I would:
1) Backup /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.11.13 to some place in you home dir or in /root (it's probably too late now, but never mind).
2) Run:
- Code: Select all
sudo strip --remove-section=.note.ABI-tag /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.11.13
At this point, things should be fine until the next time you upgrade the package providing libQt5Core. First try 'ldd /usr/lib/qt5/bin/lrelease | grep -F libQt5Core.so.5', then get back to your FG build.