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List:       gcc
Subject:    Re: [Buildroot] regression for microblaze architecture
From:       Thomas Petazzoni <thomas.petazzoni () free-electrons ! com>
Date:       2017-05-27 14:44:13
Message-ID: 20170527164413.5cba5b05 () free-electrons ! com
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Hello,

On Sat, 27 May 2017 10:51:22 +0200, Waldemar Brodkorb wrote:

> Buildroot and OpenADK have samples to create a Linux system to be
> bootup in Qemu system emulation for microblaze architecture.
> 
> With gcc 6.3 and 7.1 the samples are not working anymore, 
> because the Linux system userland does not boot.
> Qemu 2.9.0:
> Kernel panic - not syncing: Attempted to kill init!
> exitcode=0x0000000b
> (with glibc, musl and uClibc-ng toolchains)
> 
> I bisected gcc source code and found the bad commit:
> 6dcad60c0ef48af584395a40feeb256fb82986a8

Nice, great work!

> When reverting the change, gcc 6.3 and 7.1 produces working
> Linux rootfs again.
> 
> What can we do about it?

 1. Add a revert of this commit in Buildroot for gcc 6.x and 7.x

 2. Report the bug upstream, pointing to the problematic commit

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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