Follow-up Comment #6, bug #20501 (project make):
Actually adding -r to MAKEFLAGS does work. It just that -p still prints the
rules as if they were there. I use the following makefile fragment in our
build system to get rid of all built-in (suffix and pattern) rules:
# Remove all built-in rules.
#
.SUFFIXES:
ifeq ($(filter -r,$(MAKEFLAGS)),)
MAKEFLAGS += -r
endif
There was a thread on one of the GNU make mailing lists about this
interesting behavior some time ago.
As for adding -R, I think it is quite obvious why it does not work: make sets
built-in variables before it starts reading makefiles.
Boris
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