From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon@6wind.com>
Subject: Re: [PATCH] mk: add makefile extention support
Date: Sun, 28 Feb 2016 22:00:02 +0100
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References: <1455039314-86891-1-git-send-email-keith.wiles@intel.com>
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To: Keith Wiles <keith.wiles@intel.com>
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Hi,

2016-02-09 11:35, Keith Wiles:
> Adding support to the build system to allow for Makefile.XXX
> extention to a subtree, which already has Makefiles. These
> Makefiles could be from the autotools and others places. Using
> the Makefile extention RTE_MKFILE_SUFFIX in a makefile subtree
> using 'export RTE_MKFILE_SUFFIX=.XXX' to use Makefile.XXX in
> that subtree.
> 
> The main reason I needed this feature was to integrate a autotool
> open source projects with DPDK and keep the original Makefiles.

Sorry I fail to understand why it is needed.
Are you trying to add autotool in DPDK? I don't think it is a good approach.
The DPDK must provide a pkgconfig interface to be integrated anywhere.