From: "Yann E. MORIN" <yann.morin.1998@free.fr>
To: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Romain Naour <romain.naour@gmail.com>,
Giulio Benetti <giulio.benetti@benettiengineering.com>,
buildroot@buildroot.org
Subject: Re: [Buildroot] [PATCH] package/binutils: prevent selecting 2.37 for AVX512 systems
Date: Sun, 30 Oct 2022 20:33:06 +0100 [thread overview]
Message-ID: <20221030193306.GD1058960@scaer> (raw)
In-Reply-To: <20221026175430.3927965-1-thomas.petazzoni@bootlin.com>
Thomas, All,
On 2022-10-26 19:54 +0200, Thomas Petazzoni via buildroot spake thusly:
> Support for the AVX512FP16 instructions was added in binutils
> 2.38. See the binutils 2.38 releases notes [0] that state:
> X86:
> [...]
> * Add support for Intel AVX512_FP16 instructions.
[--SNIP--]
> Also, in Buildroot, we do not distinguish AVX512 in general from
> AVX512FP16 specifically, so our only option is to make binutils 2.37
> unavailable for AVX512 systems even if some of them perhaps don't
> support AVX512FP16 anyway. This seems like a reasonable trade-off, as
> binutils 2.38 is anyway already the default in Buildroot, and
> AVX512-capable systems are fairly recent, and therefore using a recent
> binutils version should not be a problem on these platforms.
ACK
> Fixes:
>
> http://autobuild.buildroot.net/results/eb6e28c934654e6d714973415a2fb452f9580279/
>
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Applied to master, thanks.
Regards,
Yann E. MORIN.
> ---
> package/binutils/Config.in.host | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/package/binutils/Config.in.host b/package/binutils/Config.in.host
> index 51802db043..5dd2af2f9c 100644
> --- a/package/binutils/Config.in.host
> +++ b/package/binutils/Config.in.host
> @@ -14,6 +14,9 @@ choice
>
> config BR2_BINUTILS_VERSION_2_37_X
> bool "binutils 2.37"
> + # AVX512FP16 instructions were not supported before binutils
> + # 2.38
> + depends on !BR2_X86_CPU_HAS_AVX512
>
> config BR2_BINUTILS_VERSION_2_38_X
> bool "binutils 2.38"
> --
> 2.37.3
>
> _______________________________________________
> buildroot mailing list
> buildroot@buildroot.org
> https://lists.buildroot.org/mailman/listinfo/buildroot
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prev parent reply other threads:[~2022-10-30 19:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-26 17:54 [Buildroot] [PATCH] package/binutils: prevent selecting 2.37 for AVX512 systems Thomas Petazzoni via buildroot
2022-10-30 19:33 ` Yann E. MORIN [this message]
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