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Bug#1072311: linux-perf can (and should) link against libdebuginfod

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  Bug#1072311: linux-perf can (and should) link against libdebuginfod Sergio Durigan Junior <sergiodj@debian.org> - 2024-05-31 22:40 +0200
    Bug#1072311: linux-perf can (and should) link against libdebuginfod Sergio Durigan Junior <sergiodj@debian.org> - 2024-05-31 23:00 +0200
    Bug#1072311: linux-perf can (and should) link against libdebuginfod Sergio Durigan Junior <sergiodj@debian.org> - 2024-05-31 23:00 +0200
    Processed: Re: Bug#1072311: linux-perf can (and should) link  against libdebuginfod "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-05-31 23:00 +0200
    Bug#1072311: linux-perf can (and should) link against libdebuginfod Sergio Durigan Junior <sergiodj@debian.org> - 2024-06-01 01:00 +0200
    Bug#1072311: linux-perf can (and should) link against libdebuginfod Ben Hutchings <ben@decadent.org.uk> - 2024-07-25 03:50 +0200
    Bug#1072311: marked as done (linux-perf can (and should) link  against libdebuginfod) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-07-27 10:10 +0200

#82637 — Bug#1072311: linux-perf can (and should) link against libdebuginfod

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Source: linux
Version: 6.8.11-1
Severity: normal

Dear maintainer,

Upon investigating why Debian's linux-perf does not support debuginfod,
I found the following excerpt on its rules file[1]:

    # perf can link against libdebuginfod if available, but the result is
    # undistributable for the same reason.  Override detection of
    # libdebuginfod.
    MAKE_PERF += NO_LIBDEBUGINFOD=1

This picked my attention, as I am not aware of any licensing issues that
might prevent linux-perf from linking against libdebuginfod.

While looking at debuginfod source files[2], I found that libdebuginfod
is actually composed of a single file[3]:

    libdebuginfod_a_SOURCES = debuginfod-client.c
    libdebuginfod_pic_a_SOURCES = debuginfod-client.c

and that debuginfod-client.c is dual-licensed GPL-3+ and GPL-2+[4]:

   This file is free software; you can redistribute it and/or modify
   it under the terms of either

     * the GNU Lesser General Public License as published by the Free
       Software Foundation; either version 3 of the License, or (at
       your option) any later version

   or

     * the GNU General Public License as published by the Free
       Software Foundation; either version 2 of the License, or (at
       your option) any later version

   or both in parallel, as here.

debuginfod.h, which is included from debuginfod-client.c, is also
dual-licensed[5].

Out of an abundance of caution, I contacted debuginfod's upstream
developers and confirmed that the dual-licensing scheme was chosen
exactly in order to allow tools like perf to link against libdebuginfod.
I've also confirmed that Fedora's perf does support debuginfod.

Given all of the above, I would like to request that debuginfod support
be enabled on Debian's linux-perf.  That would be very useful for our
users.

Thank you,

[1]: https://salsa.debian.org/kernel-team/linux/-/blob/master/debian/rules.d/tools/perf/Makefile?ref_type=heads#L13-16
[2]: https://sourceware.org/cgit/elfutils/tree/debuginfod
[3]: https://sourceware.org/cgit/elfutils/tree/debuginfod/Makefile.am?id=915776dc4ab9308a5c62c42e72b5bd15b7012753#n83
[4]: https://sourceware.org/cgit/elfutils/tree/debuginfod/debuginfod-client.c?id=915776dc4ab9308a5c62c42e72b5bd15b7012753
[5]: https://sourceware.org/cgit/elfutils/tree/debuginfod/debuginfod.h.in?id=915776dc4ab9308a5c62c42e72b5bd15b7012753

-- 
Sergio
GPG key ID: 237A 54B1 0287 28BF 00EF  31F4 D0EB 7628 65FC 5E36
Please send encrypted e-mail if possible
https://sergiodj.net/

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#82638

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On Friday, May 31 2024, I wrote:

> Dear maintainer,
[...]
> Given all of the above, I would like to request that debuginfod support
> be enabled on Debian's linux-perf.  That would be very useful for our
> users.

Disclaimer: I am not a lawyer and the contents of the bug description
are not legal advice.

Thanks,

-- 
Sergio
GPG key ID: 237A 54B1 0287 28BF 00EF  31F4 D0EB 7628 65FC 5E36
Please send encrypted e-mail if possible
https://sergiodj.net/

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#82639

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Control: tags -1 + patch

MR filed: https://salsa.debian.org/kernel-team/linux/-/merge_requests/1093

-- 
Sergio
GPG key ID: 237A 54B1 0287 28BF 00EF  31F4 D0EB 7628 65FC 5E36
Please send encrypted e-mail if possible
https://sergiodj.net/

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#82640 — Processed: Re: Bug#1072311: linux-perf can (and should) link against libdebuginfod

Processing control commands:

> tags -1 + patch
Bug #1072311 [src:linux] linux-perf can (and should) link against libdebuginfod
Added tag(s) patch.

-- 
1072311: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1072311
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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#82641

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On Friday, May 31 2024, I wrote:

> and that debuginfod-client.c is dual-licensed GPL-3+ and GPL-2+[4]:

I meant to say "LGPL-3+ and GPL-2+" here.

>    This file is free software; you can redistribute it and/or modify
>    it under the terms of either
>
>      * the GNU Lesser General Public License as published by the Free
>        Software Foundation; either version 3 of the License, or (at
>        your option) any later version
>
>    or
>
>      * the GNU General Public License as published by the Free
>        Software Foundation; either version 2 of the License, or (at
>        your option) any later version
>
>    or both in parallel, as here.

-- 
Sergio
GPG key ID: 237A 54B1 0287 28BF 00EF  31F4 D0EB 7628 65FC 5E36
Please send encrypted e-mail if possible
https://sergiodj.net/

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#83185

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On Fri, 31 May 2024 16:30:37 -0400 Sergio Durigan Junior
<sergiodj@debian.org> wrote:
> Source: linux
> Version: 6.8.11-1
> Severity: normal
> 
> Dear maintainer,
> 
> Upon investigating why Debian's linux-perf does not support
debuginfod,
> I found the following excerpt on its rules file[1]:
> 
>     # perf can link against libdebuginfod if available, but the
result is
>     # undistributable for the same reason.  Override detection of
>     # libdebuginfod.
>     MAKE_PERF += NO_LIBDEBUGINFOD=1
> 
> This picked my attention, as I am not aware of any licensing issues
that
> might prevent linux-perf from linking against libdebuginfod.
> 
> While looking at debuginfod source files[2], I found that
libdebuginfod
> is actually composed of a single file[3]:
> 
>     libdebuginfod_a_SOURCES = debuginfod-client.c
>     libdebuginfod_pic_a_SOURCES = debuginfod-client.c
> 
> and that debuginfod-client.c is dual-licensed GPL-3+ and GPL-2+[4]:
[...]

Thank you for pointing this out.

I disabled use of debuginfod on 26/12/2022, and it looks like I missed
your update to the elfutils debian/copyright file on 21/12/2022 that
would have made the dual licensing of this library clear.

Ben.

-- 
Ben Hutchings
Quantity is no substitute for quality, but it's the only one we've got.

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#83236 — Bug#1072311: marked as done (linux-perf can (and should) link against libdebuginfod)

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Your message dated Sat, 27 Jul 2024 08:02:27 +0000
with message-id <E1sXcNn-008RHE-9l@fasolo.debian.org>
and subject line Bug#1072311: fixed in linux 6.10.1-1~exp1
has caused the Debian Bug report #1072311,
regarding linux-perf can (and should) link against libdebuginfod
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
1072311: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1072311
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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