[dpdk-dev] [PATCH v2] net/i40e: fix avx code error on MinGW

[Thomas Monjalon]

04/02/2021 13:36, Ferruh Yigit:
> On 2/4/2021 10:41 AM, Zhang, Qi Z wrote:
> > From: Dmitry Kozlyuk <dmitry.kozliuk at gmail.com>
> >> On Tue,  2 Feb 2021 22:32:58 +0800, Leyi Rong wrote:
> >>> Adds extra cflags '-fno-asynchronous-unwind-tables'
> >>> to avoid the MinGW build error:
> >>> 	Error: invalid register for .seh_savexmm
> >>>
> >>> Fixes: 5c38c33f7880 ("net/i40e: disable AVX512 with MinGW")
> >>>
> >>> Signed-off-by: Leyi Rong <leyi.rong at intel.com>
> >>
> >> Tested-by: Dmitry Kozlyuk <dmitry.kozliuk at gmail.com>
> >>
> >> Re: -fno-asynchronous-unwind-tables, when cross-compiling from Linux, I
> >> observe bit-to-bit identical i40e_rxtx_vec_avx512.c.obj. My guess it that this
> >> option somehow affects GCC inlining heuristics. Similar issue existed in
> >> librte_acl (at least a year ago win GCC 6, I believe), where GCC generated
> >> incorrect code unless certain functions had been inlined (caught by test app).
> >> No an AVX expert, just my 2c.
> > 
> > Applied to dpdk-next-net-intel.
> > 
> 
> Hi Thomas, David,
> 
> Do you prefer to get this directly to the main repo, since it is fixing the 
> windows build?

Given it will be pulled shortly, I think it's OK through next-net.