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

fengchengwen fengchengwen at huawei.com
Wed May 19 15:30:40 CEST 2021


Thanks a lot, Ferruh
Already rebase and send v6, please review 2/2 patch.


On 2021/5/19 20:30, Ferruh Yigit wrote:
> 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?
> 
> .
> 



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