[Toybox] ps down, top to go

[Rob Landley]

On 05/10/2016 02:33 AM, Rob Landley wrote:
> Sorry, the distraction was actually that when I tried your test I had
> that darn "./ps -A doesn't show all processes, but a make clean fixes
> it" thing again and I snapshotted the generated/ directory and compared
> them and it makes NO sense. (I suspect I overwrite some generated files
> with a later build. I still don't have a reproduction sequence.)
> 
> Attempting to diff the "objdump -d generated/obj/ps.o" output was...
> long and uninformative.
> 
> Distracted me from the topic at hand a bit. 99% sure this is a build
> dependency issue and not a code issue though. It _is_ reliably fixed by
> "make clean", I just... ???

Reproduction sequence:

make clean
make top
make ps
$ ./ps -A
  PID TTY          TIME CMD
21087 pts/81   00:00:00 ps
30665 pts/81   00:00:00 bash

The bug is building other standalone commands in the same file. And the
problem is the dependencies don't rebuild generated/obj/ps.o because
it's newer than generated/flags.h but _not_ newer than
generated/config.h but since generated/config.h is regenerated every
time if I make stuff depend on that we essentially always rebuild
everything.

Hmmm, I can make generated/config.h depend on .config and thus only
selectively rebuild it? I should go poke at that but it's week 2 of my
trip to tokyo and as usual, I have a stomach bug. (Microbiomes and
incubation time: still a thing.)

> Rob

Still Rob, but urp-y.