This started with the ECM cmake message error which Jasem kindly pointed out was caused
by trying to build the latest git code under Buster - must be Bullseye

So now under Bullseye I get

This output is what I got after a git pull from "master" branch, followed by a clean and full make of kstars (08/08/2022).

[ 2%] Generating ui_horizonmanager.h
[ 2%] Generating ui_polarishourangle.h
[ 2%] Generating ui_wilpsettings.h
[ 2%] Generating ui_wiequipsettings.h
[ 2%] Generating ui_unitspinboxwidget.h
[ 2%] Generating Options.h, Options.cpp
[ 2%] Generating kstarsadaptor.cpp, kstarsadaptor.h
[ 2%] Generating simclockadaptor.cpp, simclockadaptor.h
[ 2%] Generating fovadaptor.cpp, fovadaptor.h
Too many signals to create unique bit masks
make[2]: *** [kstars/CMakeFiles/KStarsLib.dir/build.make:271: kstars/Options.h] Error 1
make[2]: *** Deleting file 'kstars/Options.h'
make[2]: *** Waiting for unfinished jobs....
[ 2%] Generating indiadaptor.cpp, indiadaptor.h
[ 2%] Generating ekosadaptor.cpp, ekosadaptor.h
make[1]: *** [CMakeFiles/Makefile2:1594: kstars/CMakeFiles/KStarsLib.dir/all] Error 2
make: *** [Makefile:160: all] Error 2

Any help appreciated.

Well thanks to anyone who looked at this and I'm assuming couldn't reproduce it.

Due to the current inability to procure a spare Rpi4 to try out various 64-bit flavors of Linux, I decided
to use this Rpi4 as my observatory controller. I am awaiting delivery of a Beelink Ryzan 7 miniPC
that I will put Kubuntu 22.04 on to get back to Kstars/Ekos.

I got same issue when compiling 3.6.0 on raspberry OS based on bullseye. I solved this by deleting last line with GenerateProperties in kstars/Options.kcfgc.cmake

Thanks for that nou. I went ahead with the Beelink Ryzen 7 running kstars-bleeding and its much easier
to run than the Rpi4 (even thru VNC). I have been accused of being too stubborn sometimes - so I just moved
on from the Rpi4. So far its been the right decision.

Thanks.

Please - has anyone made progress or have a solution to the ‘…too many signals to create unique bit masks’ problem. I’m trying to upgrade from 3.6.0, but can’t get beyond the above error.

I haven’t gone as far as trying to completely remove kstars/indi from my system before reinstalling - would that help?

Thanks all - appreciate your thoughts.

I’m trying to upgrade on a rpi4 running bullseye.
Thanks again