[bug #30606] mysterious behavior from $(if)

[Timothy N Murphy]

Follow-up Comment #2, bug #30606 (project make):

Hi,

The $(call) expands everything, so you get this:

lets say $1=ab

b := ab
yn := n
vs := ab:


You might ask why :-)

Well when the $(if) is expanded by call, b has no value - the assignment has
not been executed yet because your exec happens *after* your call.

You need to protect things such that the call can't expand them prematurely.

e.g. $1 doesn't really need protection but you do need $$(if and $$(strip
$$(b)) and $$(yn)


Cheers,

Tim

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