[dpdk-dev] [PATCH v2] net/hns3: fix compile error with gcc8.3 and thunderx2

[Ferruh Yigit]

On 5/19/2021 12:54 PM, Chengwen Feng wrote:
> Compile error with gcc8.3 and crossfile arm64_thunderx2_linux_gcc:
> 	../drivers/net/hns3/hns3_rxtx_vec_sve.c
> 	cc1: error: switch ‘-mcpu=armv8.1-a’ conflicts with
> 	‘-march=armv8.2-a’ switch [-Werror]
> 	../drivers/net/hns3/hns3_rxtx_vec_sve.c:5:10: fatal error:
> 	arm_sve.h: No such file or directory
> 	    5 | #include <arm_sve.h>
> 
> The root cause is that gcc8.3 supports SVE, but it doesn't support
> compile ACLE[1] SVE code, and the hns3_rxtx_vec_sve.c was written
> by ACLE SVE code.
> 
> This patch also filters out '-march=' '-mcpu' '-mtune' when compile
> with hns3_rxtx_vec_sve.c.
> 
> [1] ACLE: Arm C Language Extensions, user should include <arm_sve.h>
> when writing ACLE SVE code.
> 
> Fixes: 203fbaf8813d ("net/hns3: refactor SVE code compile method")
> 
> Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>

Hi Chengwen,

We need CI result to proceed with the patch, since I don't have arm platfrom to
test this properly.

But in the CI applying patch fails, I guess that is because the original patch
has been dropped in the next-net.

Can you please send a new version of the patch rebased on top of latest next-net?