[PATCH] D123874: [Clang][IA] support -generate-unused-section-symbols={yes|no}

[Fangrui Song via Phabricator via llvm-commits]

MaskRay added a comment.

> Add support to clang (-Wa,-generate-unused-section-symbols={yes|no}) and llvm-mc.



> This feature might be used by the Linux kernel. https://lore.kernel.org/linux-toolchains/YllUqPK4CWZeHku8@hirez.programming.kicks-ass.net/



> This has been supported by GNU binutils since 2.36. https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=d1bcae833b32f1408485ce69f844dcd7ded093a8

AFAICT GNU as never gets an option named `-generate-unused-section-symbols=yes`.
It just has a quirk that interprets nearly all `-g*` options as `-g`, which indicates generation of some compile units for ELF symbols with the help of `.size` directives.
It's very different from generating unused section symbols.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D123874/new/

https://reviews.llvm.org/D123874