unofficial mirror of bug-guix@gnu.org 
 help / color / mirror / code / Atom feed
From: "Ludovic Courtès" <ludo@gnu.org>
To: zimoun <zimon.toutoune@gmail.com>
Cc: 21803@debbugs.gnu.org
Subject: bug#21803: guitarix non-reproducible hard to reproduce
Date: Sat, 16 Nov 2019 17:12:18 +0100	[thread overview]
Message-ID: <87y2wfx0kd.fsf@gnu.org> (raw)
In-Reply-To: <CAJ3okZ0PROt-bvhcK6g3McBvTO858di0mY_nMdxw+E2wC=xQ5g@mail.gmail.com> (zimoun's message of "Fri, 15 Nov 2019 20:46:13 +0100")

Hello!

zimoun <zimon.toutoune@gmail.com> skribis:

> My intuition is: the non-determinism comes from the WAF configuration
> files (./waf or wscript or wafadmin/).
>
> The process conditionally enters in functions such as "do_install" or
> "symlink_as", so maybe something is hidden by Python module "os" or
> similar. Moreover, note that wscript:l.990 "add_group()" is used after
> "add_subdirs('libgxw/gxw')".

My intuition :-) is that waf traverses files using directly
opendir/readdir, which returns files in an order that’s file
system-dependent.  That, in turn, leads it to make .so a symlink or not
in a non-deterministic fashion.

So I would suggest looking for uses of ‘readdir’ (or anything equivalent
in Python).

It would also be worth checking what others involved in the Reproducible
Builds effort have done (Debian, openSuSE, etc.).

Thanks,
Ludo’.

  reply	other threads:[~2019-11-16 16:13 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-01 10:30 bug#21803: Guitarix builds non-deterministically Ludovic Courtès
2019-11-12 20:44 ` bug#21803: Bug #21803 Hunting: status? zimoun
2019-11-13 13:42   ` Ludovic Courtès
2019-11-13 18:14     ` zimoun
2019-11-14 21:09       ` Ludovic Courtès
2019-11-15 11:53         ` zimoun
2019-11-15 15:35           ` bug#21803: other waf non reproducible: mpv and ardour zimoun
2019-11-15 19:46           ` bug#21803: guitarix non-reproducible hard to reproduce zimoun
2019-11-16 16:12             ` Ludovic Courtès [this message]
2019-11-18 18:18               ` zimoun
2019-11-18 20:29                 ` Ludovic Courtès
2020-09-11 13:57 ` bug#21803: Guitarix builds non-deterministically zimoun
2020-09-11 16:48   ` Maxim Cournoyer

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://guix.gnu.org/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=87y2wfx0kd.fsf@gnu.org \
    --to=ludo@gnu.org \
    --cc=21803@debbugs.gnu.org \
    --cc=zimon.toutoune@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/guix.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).