Hi Sam,
LISTx := A A B C D D E
LISTd := $(strip \
$(foreach v,$(sort $(LISTx)),\
$(if $(filter-out 1,$(words $(filter $(v),$(LISTx)))),\
$(v))))
$(info My make version=$(MAKE_VERSION))
$(info Original list => $(LISTx))
$(info Duplicates list => $(LISTd))
This gives out the following:
My make version=4.0
Original list => A A B C D D E
Duplicates list => A D
Thanks,
Rakesh
> Date: Sun, 27 Jul 2014 11:58:59 +0200
> From: [email protected]
> To: [email protected]
> Subject: Find duplicates in a list
>
> Hi all.
>
> I'm trying to find a way to detect duplicate items in a list without
> escaping to a shell.
>
> Consider the following:
>
> list := A B C A D C
>
> In the list above A and C is duplicated.
> I would like to find a way so I can find which items are duplicated and print
> them out.
>
> The solution should preferably work with gmake 3.81 and even better in make
> 3.80
>
> Thanks in advance,
>
> Sam
>
>
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