[llvm-bugs] [Bug 32400] Report undefined symbol errors before doing LTO

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=32400

Fangrui Song <i at maskray.me> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |i at maskray.me
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #6 from Fangrui Song <i at maskray.me> ---
Fixed for COFF: https://reviews.llvm.org/D62434

For ELF, this is not fixable. ELF undefined symbols errors are relocation
based. And the relocation scanning has to happen after --gc-sections to be
compatible with GNU linkers. I know that Android specifically relies on this
property. Such users may even use -mllvm -asan-globals=0.

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