Negating --no-print-directory

Hi.

When --no-print-directory is set in MAKEFLAGS,
what is the best way to negate it?

One solution is to filter it out from MAKEFLAGS.

IMHO, it would be simpler to be able to negate
--no-print-directory by passing -w (--print-directory).



[Working solution]

ifeq ($(SUBMAKE),)
MAKEFLAGS += --no-print-directory
MAKEFLAGS += -rR
all:
        @echo in top: MAKEFLAGS=$(MAKEFLAGS)
        MAKEFLAGS="$(filter-out --no-print-directory, $(MAKEFLAGS))"
$(MAKE) SUBMAKE=1
else
all:
        @echo in submake: MAKEFLAGS=$(MAKEFLAGS)
endif


$ make
in top: MAKEFLAGS=rR --no-print-directory
MAKEFLAGS="rR" make SUBMAKE=1
make[1]: Entering directory '/tmp'
in submake: MAKEFLAGS=rRw -- SUBMAKE=1
make[1]: Leaving directory '/tmp'


[Not working (but I hoped it would work)]

ifeq ($(SUBMAKE),)
MAKEFLAGS += --no-print-directory
MAKEFLAGS += -rR
all:
        @echo in top: MAKEFLAGS=$(MAKEFLAGS)
        $(MAKE) -w SUBMAKE=1
else
all:
        @echo in submake: MAKEFLAGS=$(MAKEFLAGS)
endif


$ make
in top: MAKEFLAGS=rR --no-print-directory --print-directory
make SUBMAKE=1
in submake: MAKEFLAGS=rR --no-print-directory -- SUBMAKE=1




The second case does not work, but does it make sense
to support it?


Currently, --no-print-directory always takes precedence
over --print-directory.

One question pops up: in which case is the -w option useful?
-w is an implicit default.
Once --no-print-directory is given, --no-print-directory always wins.
Passing -w later has no effect.


-- 
Best Regards
Masahiro Yamada