28 Nov
2017
28 Nov
'17
11:42 p.m.
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