Hi Paul,

Yesterday I found another use of make's -t flag: It helps make sure
that the logic in the Makefile is correct.  You could run the target
without -t, but then you risk seeing warnings and errors from the
commands run by the target before make's own ones, which would hide
Makefile problems.

If you run `make -kstj [target(s)]` after modifying a Makefile, it
will show only and all^Wmost problems in the Makefile itself.  It
could be especially useful with 4.4's --shuffle, although I don't
have it yet in Debian Sid :(.  I should build from source and try it.

I'll start using that as a rule to check changes to Makefiles, and
hopefully will avoid introducing bugs that I need to fix in the next
commit :)



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