The following makefile.1 produces correct results:
-------------------------------
target1 : var := one
target2 : var := two
targets := target1 target2
all : $(targets)
.SECONDEXPANSION:
$(targets) : foo/$$(var)/bar
foo/%/bar :
mkdir -p $(dir $@)
touch $@
.PHONY : target1 target2
-------------------------
> make -f makefile.1
mkdir -p foo/one/
touch foo/one/bar
mkdir -p foo/two/
touch foo/two/bar
However, makefile.2 does not pick up var:
-----------------------------------------
target1 : var := one
target2 : var := two
targets := target1 target2
all : $(targets)
.SECONDEXPANSION:
$(targets) : test/$$@
$(targets:%=test/%) : foo/$$(var)/bar
foo/%/bar :
mkdir -p $(dir $@)
touch $@
.PHONY : $(targets) $(targets:%=test/%)
------------------------------------
> make -f makefile.2
make: *** No rule to make target `foo//bar', needed by `test/target1'.
Stop.
According to make documentation:
"when you define a target-specific variable that variable value is also
in effect for all prerequisites of this target, and all their
prerequisites, etc."
Since test/target1 is a prerequisite for target1 and var is defined for
target1, it should be available also for test/target1. Secondary
expansion works when expanding 'var' for target1 and target2 in
makefile.1, but it doesn't when expanding it in makefile.2
Am I doing something incorrect here or is it an unimplemented
functionality, specifically that target specific variables are not
inherited in prerequisites of prerequisite?
The behavior is the same in 3.81 and 3.82.
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