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From: David Marchand <david.marchand@redhat.com>
To: Bruce Richardson <bruce.richardson@intel.com>,
	"Yigit, Ferruh" <ferruh.yigit@intel.com>
Cc: Jeff Guo <jia.guo@intel.com>, Haiyue Wang <haiyue.wang@intel.com>,
	 Alvin Zhang <alvinx.zhang@intel.com>, dev <dev@dpdk.org>,
	 Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>,
	nd <nd@arm.com>,  Ruifeng Wang <ruifeng.wang@arm.com>,
	Feifei Wang <feifei.wang2@arm.com>
Subject: Re: [dpdk-dev] [PATCH 2/2] net/igc: fix gcc build for optimization level 0
Date: Fri, 27 Nov 2020 13:13:57 +0100
Message-ID: <CAJFAV8whKYfCub67daTNGnkYEhATMap7VwggQ=tbRM+A3Z9CTg@mail.gmail.com> (raw)
In-Reply-To: <CAJFAV8x_8=z8G-_TVuGEABq116_kQFE05BxwdCD=Q7j4w1=-EA@mail.gmail.com>

On Fri, Nov 27, 2020 at 10:02 AM David Marchand
<david.marchand@redhat.com> wrote:
>
> On Fri, Nov 27, 2020 at 9:10 AM Ruifeng Wang <ruifeng.wang@arm.com> wrote:
> >
> > Gcc build with '-O0' failed for:
> >  ../drivers/net/igc/base/igc_api.c
> >  Assembler messages:
> > 29: Error: selected processor does not support `casp x0,x1,x2,x3,[x4]'
> > 82: Error: selected processor does not support `caspa x0,x1,x2,x3,[x4]'
> > 135: Error: selected processor does not support `caspl x0,x1,x2,x3,[x4]'
> > 188: Error: selected processor does not support `caspal x0,x1,x2,x3,[x4]'
> >
> > This is due to c_args not been passed to meson.
> >
> > Fixes: 8cb7c57d9b3c ("net/igc: support device initialization")
> > Cc: alvinx.zhang@intel.com
> >
> > Reported-by: Feifei Wang <feifei.wang2@arm.com>
> > Signed-off-by: Ruifeng Wang <ruifeng.wang@arm.com>
>
> I did not get to reproduce it yet (get an error on first patch...).
>
> The patch looks fine but I fear some compilation problems since a lot
> of base drivers filter cflags.
> Still waiting for CI results...
>
> Bruce,Ferruh,
> Wdyt?

Comparing before/after patch on x86, gcc, static build, the only difference is:
 -march=native -DALLOW_EXPERIMENTAL_API -DALLOW_INTERNAL_API
-Wno-format-truncation

Which corresponds to drivers/meson.build:

default_cflags = machine_args
default_cflags += ['-DALLOW_EXPERIMENTAL_API']
default_cflags += ['-DALLOW_INTERNAL_API']

if cc.has_argument('-Wno-format-truncation')
        default_cflags += '-Wno-format-truncation'
endif

So little risk wrt warning flags.
Still I'd like to hear from Intel, thanks.


-- 
David Marchand


  reply	other threads:[~2020-11-27 12:14 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-27  8:09 [dpdk-dev] [PATCH 0/2] gcc build fix Ruifeng Wang
2020-11-27  8:09 ` [dpdk-dev] [PATCH 1/2] eal/arm: fix gcc build for optimization level 0 Ruifeng Wang
2020-11-27  8:39   ` David Marchand
2020-11-27  8:51     ` Jerin Jacob
2020-11-27  9:25       ` David Marchand
2020-11-27  9:33         ` Jerin Jacob
2020-11-27  9:45           ` David Marchand
2020-11-27 10:05             ` Ruifeng Wang
2020-11-27 10:28               ` Jerin Jacob
2020-11-27  9:39         ` Andrew Rybchenko
2020-11-27  9:36     ` Ruifeng Wang
2020-11-27  8:09 ` [dpdk-dev] [PATCH 2/2] net/igc: " Ruifeng Wang
2020-11-27  8:53   ` Jerin Jacob
2020-11-27  9:02   ` David Marchand
2020-11-27 12:13     ` David Marchand [this message]
2020-11-27 14:50       ` Wang, Haiyue
2020-11-27 10:15 ` [dpdk-dev] [PATCH v2 0/2] gcc build fix Ruifeng Wang
2020-11-27 10:15   ` [dpdk-dev] [PATCH v2 1/2] eal/arm: fix gcc build for optimization level 0 Ruifeng Wang
2020-11-27 13:03     ` Ruifeng Wang
2020-11-27 10:15   ` [dpdk-dev] [PATCH v2 2/2] net/igc: " Ruifeng Wang
2020-11-27 13:35   ` [dpdk-dev] [PATCH v2 0/2] gcc build fix Thomas Monjalon
2020-11-27 14:08     ` Ruifeng Wang
2020-11-27 16:03 ` [dpdk-dev] [PATCH " Thomas Monjalon

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