[PATCH] D135082: [lld-macho] Mark aliased symbols as noDeadStrip

[Jez Ng via Phabricator via llvm-commits]

int3 added a comment.

I played around with the test a bit and I realized that ld64 doesn't actually dead-strip `_foo` if `.subsections_via_symbols` isn't there (even though `_foo` and `_main` are in separate files and therefore separate sections...)

With .subsections_via_symbols added, I noticed that ld64 does actually dead-strip `_bar` (but not `_foo`!). I am not really sure that behavior makes sense, presumably an alias exists so that some other library can look up the aliasing symbol name, not the aliased symbol name...

So I think we should add .subsections_via_symbols + add a comment to the test describing this deviation from ld64

I will look into N_INDR shortly...


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D135082/new/

https://reviews.llvm.org/D135082