From: ralph@inputplus.co.uk (Ralph Corderoy)
Subject: [TUHS] /bin/true (was basic tools / Universal Unix)
Date: Tue, 28 Nov 2017 22:42:00 +0000 [thread overview]
Message-ID: <20171128224200.E69A721518@orac.inputplus.co.uk> (raw)
In-Reply-To: <CAEoi9W4ZDOAJ1KHym6yRbyJh7mAdL3FVD9f292A3R8UYhHKOdw@mail.gmail.com>
Hi Dan,
> There is, perhaps, some debugging value in embedding ident strings in
> object code: one can see which versions of which sources were used to
> construct a given binary.
That's died away, but there is a `build ID' that's gained favour with
the pursuit of `reproducable builds', e.g. don't have the compiler add a
timestamp.
$ readelf -n /bin/true
Displaying notes found in: .note.ABI-tag
Owner Data size Description
GNU 0x00000010 NT_GNU_ABI_TAG (ABI version tag)
OS: Linux, ABI: 2.6.32
Displaying notes found in: .note.gnu.build-id
Owner Data size Description
GNU 0x00000014 NT_GNU_BUILD_ID (unique build ID bitstring)
Build ID: 32c992f2f7265996a76ca416c229b92f4c9edcf4
$
https://en.wikipedia.org/wiki/Deterministic_compilation
https://reproducible-builds.org/
--
Cheers, Ralph.
https://plus.google.com/+RalphCorderoy
next prev parent reply other threads:[~2017-11-28 22:42 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-19 14:52 /bin/true (was [TUHS] " Ron Natalie
2017-10-19 15:01 ` Pete Wright
2017-10-19 15:17 ` Chet Ramey
2017-10-19 21:23 ` Steffen Nurpmeso
2017-10-19 21:43 ` Chet Ramey
2017-10-19 23:00 ` [TUHS] /bin/true (was " Dave Horsfall
2017-10-19 23:14 ` Grant Taylor
2017-10-19 23:23 ` Lyndon Nerenberg
2017-10-19 23:27 ` Kurt H Maier
2017-10-22 4:18 ` Dave Horsfall
2017-10-20 12:10 ` Chet Ramey
2017-10-19 21:43 ` /bin/true (was [TUHS] " Dave Horsfall
2017-10-19 22:04 ` Ronald Natalie
2017-10-19 23:25 ` [TUHS] /bin/true (was " Dave Horsfall
[not found] ` <CAEoi9W7YZ7YXUip0JTMGip3Nd0czgdjqRCMRcK2GYmDJsckuDg@mail.gmail.com>
[not found] ` <CAEoi9W4zdJ3+RXjK5-5rAJ6rwx_0kx6N-bn1U61=txJGyLT_mw@mail.gmail.com>
2017-10-20 1:27 ` Dan Cross
2017-10-20 1:31 ` Lyndon Nerenberg
2017-10-20 2:05 ` Ronald Natalie
2017-11-28 16:21 ` Nemo
2017-11-28 17:56 ` Warner Losh
2017-11-28 18:26 ` Dan Cross
2017-11-28 18:41 ` Warner Losh
2017-11-28 19:09 ` Dan Cross
2017-11-28 20:34 ` Clem Cole
2017-11-28 22:42 ` Ralph Corderoy [this message]
2017-11-28 18:34 ` Bakul Shah
2017-11-28 23:25 ` Ralph Corderoy
2017-10-22 23:00 Doug McIlroy
2017-10-23 1:11 ` Dan Cross
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