[PATCH] D98559: [lld-macho] Implement -dependency_info

[Vy Nguyen via Phabricator via llvm-commits]

oontvoo created this revision.
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Herald added a project: lld-macho.
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Bug: https://bugs.llvm.org/show_bug.cgi?id=49278
The flag is not well documented, so this implementation is based on observed behaviour.

When specified, `-dependency_info <path>` produced a text file containing information pertaining to the current linkage, such as input files, output file, linker version, etc.

This file's layout is also not documented, but it seems to be a series of null ('\0') terminated strings in the form `<op code><path>`

`<op code>` could be:

  `0x00` : linker version
  `0x10` : input
  `0x11` : files not found(??)
  `0x40` : output

`<path>` : is the file path, except for the linker-version case.

(??) This part is a bit unclear. I think it means all the files the linker attempted to look at, but could not find.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D98559

Files:
  lld/MachO/CMakeLists.txt
  lld/MachO/Config.cpp
  lld/MachO/Config.h
  lld/MachO/Driver.cpp
  lld/MachO/DriverUtils.cpp
  lld/MachO/Options.td

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