Hallo Paul:
I have been investigating Kaz Kylheku's suggestion about adding flags to
MAKEFLAGS inside the makefile.
I believe that adding --no-builtin-variables has no effect. It is probably too
late to do that inside the makefile.
That means that option '--no-builtin-rules' does not get automatically enabled
either.
I think that GNU Make's documentation should mention the fact that --no-builtin-variables does not work in this scenario. I would be even better if
GNU Make issued a warning when the makefile does that.
Using GNU Make is very time-consuming because it is full of limitations and
quirks. Every little help counts.
Best regards,
rdiez