I'm aware of
http://wiki.lazarus.freepascal.org/Custom_Drawn_Interface/Android and assume it's fairly current, but could somebody give me a quick summary of where Lazarus is when it comes to running the IDE etc. on a tablet? I'm in a situation elsewhere where I need to compare notes with a Kotlin developer.

I'm able to run i386 FPC using Termux on x86_64 Android, but more sophisticated programs appear to have problems because libpthread/libdl has been rebundled.

A couple of days ago I loaded UserLAnd on my Moto Z2 Android phone. I then loaded fpc and got fpc 3.0.0 loaded for AArch64. I have this web page started: www.turbocontrol.com/userland.htm

Please try UserLAnd and report back how it works for you. Hopefully you will get a 64-bit Debian 9.

Console mode stuff is no problem, until one tries to use things like pthread. Yesterday I set up a makefile for a project that did and got bogged down with linkage errors, so it isn't simply that ld is hardcoding references to the wrong .so file.

Any more info in the last five days Mark? Thanks!

Did you get 64-bit FPC working?

Note that I'm specifically commenting on (and originally asking about) Termux, in part because of things I was being asked elsewhere. Also note that my Android tables is x86_64, not ARM (not my choice).

Haven't had time to experiment (I'm afraid I have problems here), but what I can say from looking at Termux in the past is that while it will run both 32- and 64-bit programs they've only got binutils (i.e. ld etc.) for 32.

I did try taking one of my programs that uses pthreads and writing a makefile for it so that I could compile up with FPC (rather than having to have Lazarus which obviously wouldn't work) but it still had pthreads problems i.e. it's not just the usual kind of symlink error.