Re: Enumerating list elements

[Krzysztof Cieniuch]

Christian Rishøj Jensen wrote:
> Say I have a list with some elements:
>
> FACTORS = form pos cluster
>
> I would like to enumerate the elements in the list, i.e. for each element, 
> create a variable with the element's name and the list index as the value.
>
> I have tried this:
>
> i=0 ; for f in $(FACTORS); do \
>         ((i = i + 1)) ; \
>         $(f) := $(i) ; \
> done
>
> ...but without luck: This for-loop is evaluated by the shell and does not affect Make variables. 
>
> How can I achieve the desired effect?
>
> / Christian
>
>
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Do you mean this:

FACTORS = form pos cluster
#set to factor_i:=x if you want to start index from 1
factor_i:=
$(foreach factor,$(FACTORS),   \
$(eval $(factor):=$(words $(factor_i))) \
$(eval factor_i+=x))

$(info form=$(form))
$(info pos=$(pos))
$(info cluster=$(cluster))

Chris