[llvm-dev] Microsoft SourceLink equivalent for LLVM/Clang

[Zachary Turner via llvm-dev]

Sadly I don't work on this anymore (you may have notice that the email
address that you added bounced), but I still remember enough of the details
that I'm able to offer some guidance if you want to try adding support for
it.

On Wed, Jan 22, 2020 at 12:25 PM Hayden Livingston via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> This brilliant feature needs to be in Clang!
>
> On Wed, Oct 24, 2018 at 7:37 AM Zachary Turner via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
> >
> > I was made aware of this recently when talking to the Microsoft people
> at cppcon.  I haven't added PDB support for this yet, but I don't think it
> would be difficult.  It's low priority simply because the number of people
> currently using this is probably close to zero just because Its
> discoverability is also close to zero.  It was also only introduced in the
> Microsoft Linker within the past couple of months, so it's very new.
> >
> > Anyway, it's in my backlog and I'll probably implement it soonish just
> for the sake of parity as you said.
> >
> > I haven't looked at the schema in too much detail, but my understanding
> is that it's some JSON that you embed in the PDB file describes source file
> locations.  Neither the compiler nor the linker have to do any work to
> construct this JSON at all, it's purely up to the developer to pass a
> hand-written JSON file on the command line to the linker, but the paths in
> the JSON can refer to arbitrary URLs, including -- for example -- to
> something like Github URLs.
> >
> > On Tue, Oct 23, 2018 at 11:54 PM Jordan Frost via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
> >>
> >> I made an interesting discovery today, SourceLink [
> https://docs.microsoft.com/en-us/cpp/build/reference/sourcelink?view=vs-2017
> ]
> >>
> >> It would appear it is information describing where to fetch the source
> code for a particular built object file or image.
> >>
> >> My research indicates no search format exists for DWARF and/or neither
> Clang nor GCC emit this sort of information.
> >>
> >> Are there DWARF gods here who would like to introduce this in DWARF?
> >>
> >> As an aside could Clang be taught such a trick for Windows in its PDB
> generation process? I've not been tracking the PDB progress closely
> recently but having this parity with PDBs generated by MSVC would be nifty.
> >> _______________________________________________
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> >
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