From: David Marchand <david.marchand@redhat.com>
To: Ruifeng Wang <ruifeng.wang@arm.com>, Jerin Jacob <jerinj@marvell.com>
Cc: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>,
dev <dev@dpdk.org>, nd <nd@arm.com>,
Feifei Wang <feifei.wang2@arm.com>
Subject: Re: [dpdk-dev] [PATCH 1/2] eal/arm: fix gcc build for optimization level 0
Date: Fri, 27 Nov 2020 09:39:05 +0100 [thread overview]
Message-ID: <CAJFAV8zNoFDR9=-XROsQDMWuFg+aS-1+ZjL0jOU0K9CfPC_ZYw@mail.gmail.com> (raw)
In-Reply-To: <20201127080903.26817-2-ruifeng.wang@arm.com>
On Fri, Nov 27, 2020 at 9:10 AM Ruifeng Wang <ruifeng.wang@arm.com> wrote:
>
> Gcc build with '-O0' on platforms with RTE_ARM_FEATURE_ATOMICS set
> failed for:
> ../lib/librte_efd/rte_efd.c
> Assembler messages:
> 3866: Error: selected processor does not support `crc32cb w0,w0,w1'
> 3890: Error: selected processor does not support `crc32ch w0,w0,w1'
> 3914: Error: selected processor does not support `crc32cw w0,w0,w1'
> 3938: Error: selected processor does not support `crc32cx w0,w0,x1'
>
> This was caused by an architecture specifier added for Clang.
> Unlike Clang, Gcc considers each inline assembly block to be dependent
> and therefor, the architecture specifier impacts assemble of some
> blocks require certain extension support.
I reproduced this error with -O0 for config/arm/arm64_octeontx2_linux_gcc.
The patch looks simple enough and it only affects ARM builds.
Jerin,
Are you okay with this change for 20.11?
Or should we wait 21.02?
Ruifeng,
Looking at the kernel, I see no distinction with gcc/clang, so I'd say
the kernel has the same issue, or is there something else that differs
in dpdk?
Besides, the kernel patch previously mentioned had a followup fix.
--
David Marchand
next prev parent reply other threads:[~2020-11-27 8:39 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 [this message]
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
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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