[bug #23793] MAKEFLAGS with only variable settings X=y does not work properly

[Paul D. Smith]

Update of bug #23793 (project make):

                  Status:                    None => Not A Bug              
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #1:

I don't believe this is a bug.  The GNU make manual says:

`MAKEFLAGS' begins with a hyphen only when it begins with an option that has
no single-letter version, such as `--warn-undefined-variables'

In general, it's not correct to put $(MAKEFLAGS) in a recipe line when
invoking a sub-make.  MAKEFLAGS is intended to be passed to the sub-make
through the environment, not the command line, and this will happen
automatically for you all the time.

Sub-makes should be invoked as just $(MAKE), with no $(MAKEFLAGS).

For more information, see section "Communicating Options to a Sub-make" in
the GNU make manual.

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