[PATCH] D45849: [ELF] --warn-backrefs: use the same GroupId for object files in the same --{start, end}-lib

[Fangrui Song via Phabricator via llvm-commits]

MaskRay added a comment.

`t3.o` `.globl bar; bar:`
`t4.o` `.globl foo; foo: call bar`
`t.o` `.global _start; _start: call bar`

`ld.gold t.o --start-lib t3.o t4.o --end-lib` # successfully

Without this revision, `ld.lld --warn-backrefs t.o --start-lib t3.o t4.o --end-lib` warns that `t4.o` has a reference on `t3.o`.


Repository:
  rLLD LLVM Linker

https://reviews.llvm.org/D45849