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From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Ferruh Yigit <ferruh.yigit@intel.com>
Cc: Jerin Jacob <jerin.jacob@caviumnetworks.com>,
 Bruce Richardson <bruce.richardson@intel.com>,
 Harry van Haaren <harry.van.haaren@intel.com>, dev@dpdk.org
Date: Thu, 06 Apr 2017 15:59:09 +0200
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Subject: Re: [dpdk-dev] [PATCH v2 1/3] net/thunderx: disable pmd for older
	compilers
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2017-04-06 14:46, Ferruh Yigit:
> --- a/mk/toolchain/gcc/rte.toolchain-compat.mk
> +++ b/mk/toolchain/gcc/rte.toolchain-compat.mk
> @@ -89,4 +89,8 @@ else
>  	ifeq ($(shell test $(GCC_VERSION) -lt 42 && echo 1), 1)
>  		MACHINE_CFLAGS := $(filter-out -march% -mtune% -msse%,$(MACHINE_CFLAGS))
>  	endif
> +
> +	ifeq ($(shell test $(GCC_VERSION) -lt 47 && echo 1), 1)
> +		CONFIG_RTE_LIBRTE_THUNDERX_NICVF_PMD=n
> +	endif

In previous version you were disabling the PMD inside the PMD Makefile.
It was better.