[mgear/mgear.git] / experiments / dontcare.mk

# 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 $@"
Commit	Line	Data
00804b7c MM	1	# Investigating dontcare (-include) targets to see if they're good for anything.
	2
	3	# Observation 1: If a dontcare target fails during makefile remaking and is
	4	# needed during the real run, make gives a misleading error that it has no
	5	# rule instead of reporting the original failure.
	6
	7	# Observation 2: If a required target fails, make makes do with the original
	8	# error message.
	9
	10	include required.mk
	11	-include optional.mk
	12
	13	all: required.mk
	14
	15	fail%:
	16	@echo "Failing to make $@"
	17	false
	18
	19	required.mk: fail1
	20	echo "Trying to make $@"
	21
	22	optional.mk: fail1
	23	echo "Trying to make $@"