From: "Martin Liška" <mliska@suse.cz>
To: Fangrui Song <maskray@google.com>
Cc: Pedro Alves <pedro@palves.net>, binutils@sourceware.org
Subject: Re: [PATCH][RFC] add --enable-zstd-compressed-debug-sections configure option
Date: Mon, 3 Oct 2022 09:49:25 +0200 [thread overview]
Message-ID: <20ce4355-56ca-ad6f-d7de-4c1522d33b5d@suse.cz> (raw)
In-Reply-To: <20221001073112.t6aiwxhqoi3d7k5p@google.com>
On 10/1/22 09:31, Fangrui Song wrote:
> On 2022-09-30, Martin Liška wrote:
>> On 9/30/22 13:25, Pedro Alves wrote:
>>> On 2022-09-30 10:48 a.m., Martin Liška wrote:
>>>> Hello.
>>>>
>>>> The patch can set up default compression algorithm as zstd instead of the
>>>> default zlib-gabi.
>>>>
>>>> The patch is lightly tested as readelf can't decompress debug sections:
>>>> https://sourceware.org/bugzilla/show_bug.cgi?id=29640
>>>>
>>>> Thoughts?
>>>>
>>>> ChangeLog:
>>>>
>>>> * configure.ac: Add --enable-zstd-compressed-debug-sections
>>>> configure option.
>>>> * configure: Regenerate.
>>>
>>> This may become a bit awkward in the future when other better format appears, and you want to
>>> switch to use it by default. Like, imagine zstd2 is invented. At that point we'd have to decide
>>> whether to add code to error out if the user specifies both
>>> "--enable-zstd-compressed-debug-sections --enable-zstd2-compressed-debug-sections",
>>> or always pick the latter option, or some such.
>>
>> Understood.
>>
>>>
>>> IMHO, it seems cleaner and more future proof to add instead:
>>>
>>> --enable-default-compressed-debug-sections=zlib|zlib-gnu|zlib-gabi|zstd
>>>
>>> WDYT?
>>
>> Yep, it's much nicer. Anyway, lemme try preparing a patch that does a bit of refactoring
>> before I introduce such a patch.
>>
>> Martin
>
> Personally I'll prefer that the compiler drivers (GCC and Clang) pass
> the default options to ld/as, and they have good infrastructure for
> customization... (Clang recently got better configuration file
> (https://clang.llvm.org/docs/UsersManual.html#configuration-files)
> support which enables more convenient default driver options.)
>
> Setting default options in ld/as allow very few projects which bypass
> the compiler driver to use zstd compressed debug sections but the
> benefit is probably low...
Well, I would prefer having the configure option, similar to
--enable-compressed-debug-sections, we as openSUSE rely on that where
we select the corresponding option value in binutils package.
Martin
next prev parent reply other threads:[~2022-10-03 7:49 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-23 4:08 [PATCH v3] binutils, gdb: support zstd compressed debug sections Fangrui Song
2022-09-23 14:32 ` Simon Marchi
2022-09-26 5:12 ` Alan Modra
2022-09-26 7:20 ` Fangrui Song
2022-09-26 13:30 ` Alan Modra
2022-09-26 14:08 ` Simon Marchi
2022-09-27 0:33 ` Alan Modra
2022-09-23 15:45 ` Nick Clifton
2022-09-23 15:58 ` Simon Marchi
2022-09-23 18:20 ` Fangrui Song
2022-09-23 18:57 ` Simon Marchi
2022-09-23 20:34 ` Fangrui Song
2022-09-24 5:43 ` Eli Zaretskii
2022-09-24 6:53 ` Enze Li
2022-09-24 7:13 ` Fangrui Song
2022-09-27 18:06 ` Tom Tromey
2022-09-27 18:08 ` Tom Tromey
2022-09-27 18:53 ` Fangrui Song
2022-09-29 11:43 ` Martin Liška
2022-09-29 20:17 ` Fangrui Song
2022-09-30 9:48 ` [PATCH][RFC] add --enable-zstd-compressed-debug-sections configure option Martin Liška
2022-09-30 11:25 ` Pedro Alves
2022-09-30 12:42 ` Martin Liška
2022-10-01 7:31 ` Fangrui Song
2022-10-03 7:49 ` Martin Liška [this message]
2022-10-03 7:50 ` [PATCH 1/2] refactor usage of compressed_debug_section_type Martin Liška
2022-10-11 7:14 ` Martin Liška
2022-10-11 12:06 ` Nick Clifton
2022-10-11 13:27 ` Martin Liška
2022-10-03 7:50 ` [PATCH 2/2] add --enable-default-compressed-debug-sections-algorithm configure option Martin Liška
2022-10-11 7:14 ` Martin Liška
2022-10-11 12:08 ` Nick Clifton
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