From: Romain Naour <romain.naour@gmail.com>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH 2/2] linux: Disable -ftree-loop-distribute-patterns when building for microblaze with gcc >= 10
Date: Wed, 30 Sep 2020 23:04:22 +0200 [thread overview]
Message-ID: <2efd6cda-edbf-bb5e-d7d7-89ca4491f0f0@gmail.com> (raw)
In-Reply-To: <20200930225921.39dbe8a5@windsurf.home>
Hi Thomas,
Le 30/09/2020 ? 22:59, Thomas Petazzoni a ?crit?:
> On Sat, 26 Sep 2020 21:13:30 +0200
> Romain Naour <romain.naour@gmail.com> wrote:
>
>> +# https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=5879ab5fafedc8f6f9bfe95a4cf8501b0df90edd
>> +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97208
>> +ifeq ($(BR2_TOOLCHAIN_GCC_AT_LEAST_10)$(BR2_microblaze),yy)
>> +LINUX_KCFLAGS += -fno-tree-loop-distribute-patterns
>> +endif
>
> I am wondering if this is the right approach. If the
> -ftree-loop-distribute-patterns breaks stuff for the kernel, presumably
> it could also break stuff for user-space software. So I guess we should
> instead disable it entirely in TARGET_CFLAGS.
>
> The gotcha being of course that we don't pass TARGET_CFLAGS to the
> Linux package...
Indeed, I have no ideas if the userspace built with this toolchain is really
working... except for busybox which was used by qemu_microblazeel_mmu_defconfig
Best regards,
Romain
>
> Thomas
>
next prev parent reply other threads:[~2020-09-30 21:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-26 19:13 [Buildroot] [PATCH 1/2] linux: introduce LINUX_KCFLAGS to add additional options to the C compiler Romain Naour
2020-09-26 19:13 ` [Buildroot] [PATCH 2/2] linux: Disable -ftree-loop-distribute-patterns when building for microblaze with gcc >= 10 Romain Naour
2020-09-30 20:59 ` Thomas Petazzoni
2020-09-30 21:04 ` Romain Naour [this message]
2020-10-01 8:06 ` Thomas Petazzoni
2020-10-06 18:46 ` Arnout Vandecappelle
2020-10-06 18:50 ` Thomas Petazzoni
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