# Investigating dontcare (-include) targets to see if they're good for anything.

# Observation 1: If a dontcare target fails during makefile remaking and is
# needed during the real run, make gives a misleading error that it has no
# rule instead of reporting the original failure.

# Observation 2: If a required target fails, make makes do with the original
# error message.

include required.mk
-include optional.mk

all: required.mk

fail%:
	@echo "Failing to make $@"
	false

required.mk: fail1
	echo "Trying to make $@"

optional.mk: fail1
	echo "Trying to make $@"