OK, a few questions:
You are running 64bit Linux, yes? What does 'uname -a' report?
Version 1.26 has fixed the issues with 64bit ARM. So it should work. If you still have issues, it might well be some other problem.
Compiling: Not 100% sure, but I think for compiling INDI there should be enough RAM. No need to fiddle with kstars.

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