Forgive me, I sent the wrong example and it is not really about multiple
expansion but about changing values:
FOO:=bla
$(FOO):
@echo "## $(FOO) ##"
FOO:=
The target name $(FOO) is expanded to "bla", but $(FOO) is expanded to
nothing inside the action. I studied the manual of GNU make 3.81, but
found no explanation for this effect. Can you point me to the section I
should read in order to unserstand how changing values affect actions?
--
Alexander Kriegisch
> Can anybody explain why this does not work?
>
> FOO=bla
> BAR=blu
>
> $($(FOO)_xxx): baz
> @echo "$($(FOO)_xxx)"
>
> Multiple expansion works for the target definition and possible
> prerequisites, but not for the echo or any other shell commands inside
> actions. Is this a bug or a feature? Can I somehow use multiple
> expansion in an action?
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