UNIX and Linux Applications

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

Bumping up posts or double posting is not permitted in these forums.

Please read the rules, which you agreed to when you registered, if you have not already done so.

You may receive an infraction for this. If so, don't worry, just try to follow the rules more carefully. The infraction will expire in the near future

Thank You.

The UNIX and Linux Forums.