GNU bug report logs - #8960
stdbuf on bi-arch systems

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Package: coreutils; Severity: wishlist; Reported by: Bruno Haible <bruno@HIDDEN>; dated Wed, 29 Jun 2011 20:48:01 UTC; Maintainer for coreutils is bug-coreutils@HIDDEN.

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From: Bruno Haible <bruno@HIDDEN>
To: Assaf Gordon <assafgordon@HIDDEN>
Subject: Re: bug#8960: stdbuf on bi-arch systems
Date: Fri, 18 Jan 2019 19:09:40 +0100
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Hi Assaf,

> >> The program 'stdbuf' on bi-arch x86 / x86_64 systems cannot work on all kinds
> >> of programs.
> [...]
> >> I would like to have a single binary that works on both x86 and x86_64 programs.
> [...]
> > if stdbuf sets both LD_PRELOAD_32 and LD_PRELOAD_64 to the
> > appropriate libstdbuf.so, it should just work.
> 
> It's been more than 7 years since last comments/progress on this issue.
> Is it still relevant / needed ?

Yes, it is still relevant:

  * Bi-arch systems are still frequent. Large packages are still often
    provided as 32-bit binaries, from some vendors.

  * The behaviour of stdbuf in coreutils-8.30 is still the same:

    $ /arch/x86-linux/gnu/bin/stdbuf -o 0 /bin/pwd
    ERROR: ld.so: object '/arch/x86-linux/gnu/libexec/coreutils/libstdbuf.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
    /home/bruno

    $ /arch/x86_64-linux/gnu/bin/stdbuf -o 0 /arch/x86-linux/gnu/bin/pwd
    ERROR: ld.so: object '/arch/x86_64-linux/gnu/libexec/coreutils/libstdbuf.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS64): ignored.
    /home/bruno

  * The distributor (Ubuntu 16.04 in my case) has not fixed the problem either:

    $ /usr/bin/stdbuf --version
    stdbuf (GNU coreutils) 8.25
    ...

    $ /usr/bin/stdbuf -o 0 /arch/x86-linux/gnu/bin/pwd
    ERROR: ld.so: object '/usr/lib/x86_64-linux-gnu/coreutils/libstdbuf.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS64): ignored.
    /home/bruno

Bruno
Information forwarded to bug-coreutils@HIDDEN:
bug#8960; Package coreutils. Full text available.
Severity set to 'wishlist' from 'normal' Request was from Assaf Gordon <assafgordon@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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Subject: Re: bug#8960: stdbuf on bi-arch systems
To: =?UTF-8?Q?P=c3=a1draig_Brady?= <P@HIDDEN>,
 Bruno Haible <bruno@HIDDEN>
References: <201106292247.31686.bruno@HIDDEN>
 <4E11E72D.20805@HIDDEN>
From: Assaf Gordon <assafgordon@HIDDEN>
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severity 8960 wishlist
stop

(triaging old bugs)

Hello,

On 2011-07-04 10:15 a.m., Pádraig Brady wrote:
> On 29/06/11 21:47, Bruno Haible wrote:
>> The program 'stdbuf' on bi-arch x86 / x86_64 systems cannot work on all kinds
>> of programs.
[...]
>> I would like to have a single binary that works on both x86 and x86_64 programs.
[...]
> if stdbuf sets both LD_PRELOAD_32 and LD_PRELOAD_64 to the
> appropriate libstdbuf.so, it should just work.

It's been more than 7 years since last comments/progress on this issue.
Is it still relevant / needed ?

If no one replies, I'll close it as "wontfix" in a few days.

regards,
  - assaf
Information forwarded to bug-coreutils@HIDDEN:
bug#8960; Package coreutils. Full text available.

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On 29/06/11 21:47, Bruno Haible wrote:
> Hi,
> 
> The program 'stdbuf' on bi-arch x86 / x86_64 systems cannot work on all kinds
> of programs.
> 
> I'm using 'stdbuf' from coreutils-8.12 on a glibc x86 / x86_64 system.
> 
> The binary built for x86 cannot be called on x86_64 programs:
> 
>   $ /arch/x86-linux/gnu/bin/stdbuf -o 0 /bin/pwd
>   ERROR: ld.so: object '/arch/x86-linux/gnu/lib/coreutils/libstdbuf.so' from LD_PRELOAD cannot be preloaded: ignored.
>   /home/bruno
> 
> The binary built for x86_64 cannot be called on x86 programs:
> 
>   $ /arch/x86_64-linux/gnu/bin/stdbuf -o 0 /arch/x86-linux/gnu/bin/pwd
>   ERROR: ld.so: object '/arch/x86_64-linux/gnu/lib64/coreutils/libstdbuf.so' from LD_PRELOAD cannot be preloaded: ignored.
>   /home/bruno
> 
> I would like to have a single binary that works on both x86 and x86_64 programs.

Hmm, I haven't look at this, but it seems like
if stdbuf sets both LD_PRELOAD_32 and LD_PRELOAD_64 to the
appropriate libstdbuf.so, it should just work.
However these libs would be in separate builds so
I need to look into, how best to support this.

cheers,
Pádraig.
Information forwarded to owner <at> debbugs.gnu.org, bug-coreutils@HIDDEN:
bug#8960; Package coreutils. Full text available.

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From: Bruno Haible <bruno@HIDDEN>
To: bug-coreutils@HIDDEN
Subject: stdbuf on bi-arch systems
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Hi,

The program 'stdbuf' on bi-arch x86 / x86_64 systems cannot work on all kin=
ds
of programs.

I'm using 'stdbuf' from coreutils-8.12 on a glibc x86 / x86_64 system.

The binary built for x86 cannot be called on x86_64 programs:

  $ /arch/x86-linux/gnu/bin/stdbuf -o 0 /bin/pwd
  ERROR: ld.so: object '/arch/x86-linux/gnu/lib/coreutils/libstdbuf.so' fro=
m LD_PRELOAD cannot be preloaded: ignored.
  /home/bruno

The binary built for x86_64 cannot be called on x86 programs:

  $ /arch/x86_64-linux/gnu/bin/stdbuf -o 0 /arch/x86-linux/gnu/bin/pwd
  ERROR: ld.so: object '/arch/x86_64-linux/gnu/lib64/coreutils/libstdbuf.so=
' from LD_PRELOAD cannot be preloaded: ignored.
  /home/bruno

I would like to have a single binary that works on both x86 and x86_64 prog=
rams.

Bruno
=2D-=20
In memoriam Jos=C3=A9 Olaya <http://es.wikipedia.org/wiki/Jos=C3=A9_Olaya>
Acknowledgement sent to Bruno Haible <bruno@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-coreutils@HIDDEN. Full text available.
Report forwarded to owner <at> debbugs.gnu.org, bug-coreutils@HIDDEN:
bug#8960; Package coreutils. Full text available.
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