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From: E.W.Z. <kreuzerkrieg at gmail.com>
Subject: Re: [SPDK] Compiling error on different types of Intel CPU
Date: Mon, 11 Mar 2019 18:12:30 +0200
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Agree, it is not possible as it is written now.
Opened an issue, see here https://github.com/spdk/spdk/issues/711


Sent from Mail for Windows 10

From: Harris, James R
Sent: Monday, March 11, 2019 17:23
To: Storage Performance Development Kit
Subject: Re: [SPDK] Compiling error on different types of Intel CPU


=EF=BB=BFOn 3/11/19, 5:49 AM, "SPDK on behalf of Ernest Zed" <spdk-bounces(=
a)lists.01.org on behalf of kreuzerkrieg(a)gmail.com> wrote:

    Hi,
    In continuation to this issue from May 2018, I dont see anything change=
d in
    make file, SPDK is being built with the same `-march=3Dnative` which hi=
t us
    hard two days ago when we upgraded our build machine to the latest Xeon
    which supports AVX512. Our test machines does not have this extension so
    binaries built on newer machine wont run on older ones. Meanwhile I gon=
na
    change the `-march=3Dnative` to something like `-march=3Dcore-avx-i`. B=
ut is it
    possible to change the `configure` script to pass additional compilation
    flags to the `make`?

Hi Ernest,

I don't think it's possible today.  There's a way to pass CFLAGS to configu=
re, but if I'm reading the Makefile correctly, any arch definition you put =
there would get overridden by the march=3Dnative.  The DPDK and ISA-L submo=
dules would also need plumbing to pass through the arch setting.  I think w=
e'll want to create a separate variable specific for arch, rather than try =
to 'fix' the CFLAGS handling in the configure script.

This is a pretty reasonable request though - could you file an issue in the=
 SPDK GitHub tracker for this?  Please also add in the issue if this is som=
ething you'd be interested in working on.

Thanks,

-Jim
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