[llvm] [LLVM][DWARF] Add support for .gnu_debuglink (PR #77715)

[David Blaikie via llvm-commits]

================
@@ -127,6 +127,9 @@ class DWARFContext : public DIContext {
 
   std::unique_ptr<const DWARFObject> DObj;
 
+  /// Binary containing debug information after objcopy --only-keep-debug
+  object::OwningBinary<object::ObjectFile> GnuLink;
----------------
dwblaikie wrote:

Could we avoid having this sort of invasive change by switching entirely to the debuglink binary early on & then the rest of the codepaths would work as they do today? (perhaps look at where the debuginfod is wired in - I would tihnk debuglink might work in a similar way?)

https://github.com/llvm/llvm-project/pull/77715