Debian Bug report logs - #1004504
Regression of -many on powerpc, ppc64

version graph

Package: binutils; Maintainer for binutils is Matthias Klose <[email protected]>; Source for binutils is src:binutils (PTS, buildd, popcon).

Affects: src:linux

Reported by: Ben Hutchings <[email protected]>

Date: Sat, 29 Jan 2022 17:45:02 UTC

Severity: important

Found in version binutils/2.37.90.20220123-2

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Date: Thu, 3 Mar 2022 18:38:54 +0000
From: Sean Christopherson <[email protected]>
To: Ben Hutchings <[email protected]>
Cc: [email protected]
Subject: Re: Bug#1004504: Acknowledgement (Regression of -many on powerpc,
 ppc64)
Message-ID: <[email protected]>
References: <164347806717.24466.15492770575144172465.reportbug@deadeye.wl.decadent.org.uk>
 <[email protected]>
 <[email protected]>
 <[email protected]>
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In-Reply-To: <[email protected]>

On Thu, Mar 03, 2022, Sean Christopherson wrote:
> On Sat, Jan 29, 2022, Ben Hutchings wrote:
> > See also these reports on the linuxppc list:
> > 
> > https://lore.kernel.org/linuxppc-dev/CANtoAtPcRGHafb7LddtrY5g43m82txS_mY3WO_ZtJ+pfuLvKaw@mail.gmail.com/#t
> > https://lore.kernel.org/linuxppc-dev/[email protected]/
> 
> Cross-compiling PPC on x86-64 is also broken in 2.37 due to assembler errors.
> I don't know enough about PPC to know if this is the same underlying root cause
> or something different.
> 
> With 2.37-90 (amd64), attempting to compile various inline assembly (popcntd is
> just one example), e.g.
> 
>   echo 'int foo(int x) { int p; asm ("popcntd %0,%1" : "=r" (p) : "r" (x)); return p; }' | \
>   powerpc64-linux-gnu-gcc -x c - -c -o /dev/null
> 
> fails with:
> 
>   /tmp/ccWfffoZ.s: Assembler messages:
>   /tmp/ccWfffoZ.s:26: Error: unrecognized opcode: `popcntd'
> 
> whereas version 2.34 compiles the above without error.

Ah, I belatedly see that Ben's bug report says "update from binutils 2.37 to this
snapshot", which suggests that earlier versions of 2.37 are healthy?  Whereas the
cross-compiling issue goes back to at least 2.37.7.

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