Hello Andreas,

maybe https://bugs.gentoo.org/672856 is related.

They say:

>/usr/lib/libQt5Core.so.5.11.3: ELF 64-bit LSB pie executable, x86-64, version 1 (GNU/Linux), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 4.11.0, stripped
>Nice of upstream to make significant changes to the kernel requirement on a point release.

What Linux kernel version do you have?