[Bug gas/25614] dwarf-5 allows for .file 0

[dblaikie at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=25614

--- Comment #14 from David Blaikie <dblaikie at gmail dot com> ---
(In reply to Nick Clifton from comment #13)
> (In reply to David Blaikie from comment #12)
> Hi David,
> 
> > > One question - what is the .addrsig directive ?  It is in the foo.s file
> > > that you uploaded (near the end) but gas does not recognise it.
> > 
> > Here's the documentation for the addrsig LLVM extension:
> > https://llvm.org/docs/Extensions.html#sht-llvm-addrsig-section-address-
> > significance-table
> 
> Thanks for the reference.  This is obviously a new feature, so it will
> need a new PR being filed.  Ideally of course someone from the LLVM
> community will offer a patch to add the feature, but if that does not
> happen then I will put it on my (long) list of things to do.
> 
> Cheers
>   Nick

*nod* seems unlikely it'd be a high priority for participants either project,
unless GCC folks find the feature itself to be valuable, want to implement it
in gold/binutils ld, etc.

Arguably LLVM/Clang could probably use a mode (& probably should be the default
behavior for -fno-integrated-as, though overridable) that produces binutils
as-compatible assembly & skip features like this.

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