On Tue, 2026-01-20 at 13:44 -0800, David Blaikie wrote:
> Fair enough - thanks for the context.
> I haven't seen _sup used/not familiar with its finer points.
The supplementary DWARF files are an standardization of the similar dwz
alt/multi file idea. dwz can now produce those when given --dwarf-5:
-5, --dwarf-5 Emit DWARF 5 standardized supplementary object
files instead of GNU extension .debug_altlink.
> Consistency doesn't seem so bad, even if it's with what seems like
> a fairly underused/old feature so maybe the design could be revisited.
I picked the existing format for consistency and because it described a
similar (possibly many) debug object file to a supplemental/package
file using a naming hint and a checksum/identifier.
> Would've thought it'd be nice to integrate it with buildID and/or with
> debuginfod...
O, the idea actually came up because of a proposed patch to support dwp
files by debuginfo:
https://inbox.sourceware.org/elfutils-devel/[email protected]/T/
Maybe I should have referenced that from the start, but the discussion
is not just focused on identifying DWP files, so might be distracting
from the concrete proposal.
Cheers,
Mark
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