appimage on raspberry (Stretch)

Trying to build an appImage for qt-dab on Stretch (RPI 2). Compiling the linuxdeployqt and appimagetool went
fairly smooth.
However, the resulting appImage will not run.
It "hangs". Running the AppRun directly runs as well. Using gdb and stopping it shows a backtrace

```
Program received signal SIGINT, Interrupt.
0x7589c58c in syscall () from /lib/arm-linux-gnueabihf/libc.so.6
(gdb) bt
#0 0x7589c58c in syscall () from /lib/arm-linux-gnueabihf/libc.so.6
#1 0x75a2c3f4 in __cxa_guard_acquire ()
from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6
#2 0x75cfad94 in qRegisterResourceData(int, unsigned char const*, unsigned char const*, unsigned char const*) ()
from /home/pi/appdir/usr/bin/../lib/libQt5Core.so.5
#3 0x75bb8db0 in ?? () from /home/pi/appdir/usr/bin/../lib/libQt5Core.so.5
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) q
```

(OIn a previous version I had replaced the executable in usr/bin after running linuxdeployqt. That ran but needed libraries outside the squashed fs)
jan