From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH 4/4] rte.extvars.mk: allow user to override
	RTE_SDK_BIN
Date: Mon, 21 Jul 2014 16:31:47 +0200
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To: Matthew Hall <mhall-Hv3ogNYU3JfZZajBQzqCxQ@public.gmane.org>
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Hi,

2014-07-20 20:47, Matthew Hall:
> Without this patch it is impossible to compile the examples if you have
> compiled the DPDK into the $(RTE_SDK)/build directory, or any other one
> besides $(RTE_SDK)/$(RTE_TARGET).

Please, could you explain why is it impossible in your case?

The standard usage is:
	make T=x86_64-native-linuxapp-gcc install
	make T=x86_64-native-linuxapp-gcc examples O=x86_64-native-linuxapp-gcc/examples

If you don't want to use install mode, you can build like this:
	make config T=x86_64-native-linuxapp-gcc
	make
	make -C examples RTE_SDK=$(pwd) RTE_TARGET=build O=$(readlink -m build/examples)

> --- a/mk/rte.extvars.mk
> +++ b/mk/rte.extvars.mk
> -RTE_SDK_BIN := $(RTE_SDK)/$(RTE_TARGET)
> +RTE_SDK_BIN ?= $(RTE_SDK)/$(RTE_TARGET)

I don't understand why this change could help.
You can even use this:
	make -C examples RTE_SDK=$(pwd) RTE_SDK_BIN=$(pwd)/build O=$(readlink -m build/examples)
without the patch because command line override variables.

Note that O= is optional.

-- 
Thomas