Hi,

While building initially, I got some make errors that looked like they
were from a race, for example:

    GEN         execinfo.h
  mv: cannot stat 'execinfo.h-t': No such file or directory

Further confirming my suspicion that these are coming from a race is
Emacs compiling fine if make is reinvoked, and that a non-parallel make
build works fine.

I figured this was a fluke initially, but, I reproduced the issue today.
You can fetch the build log from here:
https://www.aarsen.me/~arsen/emacs-races.script

There also appears to be a dependency missing between generating the APK
and running the pdumper, or such, since I could re-run make after make
concluded in the nonparallel case.

This seems pretty reproducible on my machine, I suspect due to the large
number of -t files utilized in Gnulib.

-- 8< --

While I'm around, I was also thinking about how to enable using the
modifier keys on virtual keyboards without modifiers.  I was considering
mapping a key, say, KEYCODE_VOLUME_DOWN to ESC if pressed and Ctrl if
held in combination with another key, hence, the sequence Press VolDown,
Release VolDown, Press VolDown, Type x, Release VolDown would be parsed
as ESC C-x, or C-M-x.  Do you know if this is possible?  All methods
that I know rely on external tools (XKB configs, AHK, ...) that are not
available on android.

Thanks in advance.
-- 
Arsen Arsenović