[all-commits] [llvm/llvm-project] 40b061: [FatLTO] Detect LLD linker more reliably (#128285)

[Vincent Lee via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 40b0619a53231eafaa879d085b7a7a10441c7f34
      https://github.com/llvm/llvm-project/commit/40b0619a53231eafaa879d085b7a7a10441c7f34
  Author: Vincent Lee <leevince at meta.com>
  Date:   2025-02-23 (Sun, 23 Feb 2025)

  Changed paths:
    M clang/lib/Driver/ToolChains/CommonArgs.cpp
    A clang/test/Driver/Inputs/basic_cross_linux_tree/usr/x86_64-unknown-linux-gnu/bin/lld-wrapper
    M clang/test/Driver/fat-lto-objects.c

  Log Message:
  -----------
  [FatLTO] Detect LLD linker more reliably (#128285)

It's possible to have an `ld-path` point to a linker that doesn't have
the `ld.lld` filename (e.g. linker wrapper that may emit telemetry
before invoking the linker). This was causing mis-compilations with
fatLTO since the check couldn't reliably detect that it was using lld.
Instead, rely on the value from `-fuse-ld` to determine whether lld is
enabled.



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