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From: Peter Samuelson <peter@cadcamlab.org>
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Date: Thu, 30 Nov 2000 05:46:33 -0600 (CST)
To: Neil Brown <neilb@cse.unsw.edu.au>
Cc: linux-kernel@vger.kernel.org, linux-kbuild@torque.net
Subject: Re: [KBUILD] Re: PATCH  - kbuild documentation.
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[Neil Brown <neilb@cse.unsw.edu.au>]
> O_OBJS := $(shell echo $(obj-y) | tr ' ' '\n' | cat -n | sort -u +1 | sort -n | cut -f2)

Clever.  I like pipelines too.  Here is a one-fork equivalent, untested:

  nodups = $(shell g=' '; for f in $(1); do case $$g in (*" $$f "*) ;; (*) g="$$g$$f "; echo $$f; esac; done)

  O_OBJS := $(call nodups,$(obj-y))

Peter
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