[PATCH] D40724: Wasm entrypoint changes #1 (add --undefined argument to LLD) APPLY AFTER D40690

[Nicholas Wilson via Phabricator via llvm-commits]

ncw created this revision.
Herald added subscribers: llvm-commits, sunfish, aheejin, jfb.

This is split out from https://reviews.llvm.org/D40559 as requested.

It adds a new argument to wasm-lld, `--undefined`, with similar semantics to the ELF linker. It pulls in symbols from files contained within a `.a` archive, forcing them to be included even if the translation unit would not otherwise be pulled in.

APPLY AFTER https://reviews.llvm.org/D40690.


Repository:
  rLLD LLVM Linker

https://reviews.llvm.org/D40724

Files:
  test/wasm/load-undefined.ll
  wasm/Driver.cpp
  wasm/Options.td
  wasm/SymbolTable.cpp
  wasm/Symbols.h

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