[PATCH] D85056: [ELF] Add --keep-section to expose linkerscript KEEP directive as a linker flag

[Fangrui Song via Phabricator via llvm-commits]

MaskRay added a comment.

> --gc-sections throw away all unreferenced sections, but we sometimes need to keep some of them.

If an input section defines a non-local symbol, you can use `-u` to retain the section.

> Although it's possible to use a linkerscript with the KEEP directive, it is often cumbersome for large repositories where each binary might have its own linkerscript.

-T can be specified multiple times. The linker scripts are essentially concatenated. What might be inconvenient is that once a linker script (unless the INSERT AFTER|BEFORE) is specified, it is considered an external linker script (GNU ld --verbose), and several built-in rules (!hasSectionsCommand) are disabled. If such requests are common, we should communicate with binutils to get a syntax.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D85056/new/

https://reviews.llvm.org/D85056