From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon@6wind.com>
Subject: Re: [PATCH] mk: remove module compilation noise
Date: Fri, 23 Sep 2016 01:35:24 +0200
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References: <1473337981-27378-1-git-send-email-ferruh.yigit@intel.com>
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To: Ferruh Yigit <ferruh.yigit@intel.com>
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2016-09-08 13:33, Ferruh Yigit:
> Following log generated by Linux kernel Makefiles:
> (cat /dev/null;   echo
> kernel/.../build/lib/librte_eal/linuxapp/igb_uio/igb_uio.ko;) >
> .../build/lib/librte_eal/linuxapp/igb_uio/modules.order
> 
> This happens because $(Q) used for both Linux and DPDK makefiles and
> DPDK unsets this variable when V=0, which makes Linux verbose.
> 
> More details:
> rte.modules calls kernel makefile with V=0 argument
> kernel makefile includes igb_uio/Makefile, which includes rte.vars.mk
> rte.vars.mk unsets Q when V=0

Yes good analysis.
Another consequence is that V=0 is equivalent to V=1 (verbose mode).
I think it is better to fix the latter issue. I'll send a patch.