[dpdk-dev] [PATCH 1/3] net/thunderx: disable pmd for gcc < 4.7
Jerin Jacob
jerin.jacob at caviumnetworks.com
Thu Apr 6 14:33:52 CEST 2017
-----Original Message-----
> Date: Thu, 6 Apr 2017 13:14:26 +0100
> From: Ferruh Yigit <ferruh.yigit at intel.com>
> To: Jerin Jacob <jerin.jacob at caviumnetworks.com>, Bruce Richardson
> <bruce.richardson at intel.com>, Harry van Haaren
> <harry.van.haaren at intel.com>, Thomas Monjalon <thomas.monjalon at 6wind.com>
> Cc: dev at dpdk.org, Ferruh Yigit <ferruh.yigit at intel.com>
> Subject: [PATCH 1/3] net/thunderx: disable pmd for gcc < 4.7
> X-Mailer: git-send-email 2.8.4
>
> PMD uses some compiler builtins and new compiler options. Tested with
> gcc 4.5.1 and following were not supported:
>
> option:
> -Ofast
>
> macros:
> _Static_assert
>
> __ORDER_LITTLE_ENDIAN__
> __ORDER_BIG_ENDIAN__
> __BYTE_ORDER__
>
> __atomic_fetch_add
> __ATOMIC_ACQUIRE
> __atomic_load_n
> __ATOMIC_RELAXED
> __atomic_store_n
> __ATOMIC_RELEASE
>
> It is not easy to fix all in PMD, disabling PMD for gcc version < 4.7
>
> Signed-off-by: Ferruh Yigit <ferruh.yigit at intel.com>
Acked-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
> ---
> drivers/net/thunderx/Makefile | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/net/thunderx/Makefile b/drivers/net/thunderx/Makefile
> index 706250b..0b9f0a2 100644
> --- a/drivers/net/thunderx/Makefile
> +++ b/drivers/net/thunderx/Makefile
> @@ -62,6 +62,14 @@ SRCS-$(CONFIG_RTE_LIBRTE_THUNDERX_NICVF_PMD) += nicvf_svf.c
>
> ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y)
> CFLAGS_nicvf_rxtx.o += -fno-prefetch-loop-arrays
> +
> +# Disable PMD for gcc < 4.7
> +ifeq ($(shell test $(GCC_VERSION) -lt 47 && echo 1), 1)
> +$(warning thunderx pmd not supported by gcc < 4.7)
> +LIB =
> +SRC-y =
> +endif
> +
> endif
> CFLAGS_nicvf_rxtx.o += -Ofast
>
> --
> 2.9.3
>
More information about the dev
mailing list