[bug #65685] Submake starts its own jobserver when its recipe contains $(MAKE) $(MFLAGS)

[Paul D. Smith]

Follow-up Comment #2, bug #65685 (group make):

I'm not sure I get where the problem is coming from.  The way I remember it is
that if we see a valid jobserver-auth argument, we ignore the value of -j. 
This is so that we can keep the -j option in the value of MAKEFLAGS so that
users can review it.

I suppose the difference we're tracking is whether the option is passed via
the environment or via the command line?

I wonder if we should simply keep the same behavior for both; if we see a
jobserver-auth on the command line we also ignore -j.  This would still allow
people to run an explicit $(MAKE) -jN and have it do the right thing.

But that might be tricky since we'd have to understand whether the
jobserver-auth was actually on the command line or whether it came from the
environment earlier.


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