ifndef erros in makefile

firetree · #1 (**permalink**) 07-02-2009

I know if-condition clause is available in makefile.
But when I try to use it inside a macro definition, bugs come out!
Any replies would be apreciated !

code:

define child
echo "child has one parameter: $1"
ifndef $2
echo "but child can also see parent's second parameter: $2!"
else
echo "and child cannot see parent's second parameter !"
endif
endef

erros:

child has one parameter: one
make: ifndef: Command not found
make: *** [scoping_issue] Error 127

otheus · #2 (**permalink**) 07-03-2009

if-else clauses in makefiles are dependent on the make program used to process them. Is this GNU make? the fabled dmake? Sun xpg tools?

Also, USE CODE TAGS please. I can't tell from your post whether this is a badly formatted makefile or just vbulletin munging your post's whitespace.

firetree · #3 (**permalink**) 07-06-2009

3ks for your replies.
I'm using GNU make, under mac os x
here is the whole codes:

Code:

define parent
	echo "parent has two parameters: $1, $2"
	$(call child,$1)
endef

define child
	echo "child has one parameter: $1"
 	ifndef $2
		echo "but child can also see parent's second parameter: $2!"
	else
		echo "and child cannot see parent's second parameter !"
	endif
endef

scoping_issue:
	@$(call parent,one, two)

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