[all-commits] [llvm/llvm-project] b8e768: [CMake][Release] Use llvm-bitcode-strip on Darwin ...

[Cullen Rhodes via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b8e768f6ae95343ac542b195265572ecd063fc2b
      https://github.com/llvm/llvm-project/commit/b8e768f6ae95343ac542b195265572ecd063fc2b
  Author: Cullen Rhodes <cullen.rhodes at arm.com>
  Date:   2026-06-02 (Tue, 02 Jun 2026)

  Changed paths:
    M clang/cmake/caches/release_cpack_pre_build_strip_lto.cmake

  Log Message:
  -----------
  [CMake][Release] Use llvm-bitcode-strip on Darwin for build with -ffat-lto-objects (#200764)

Building with --fat-lto-objects was added in #140381 (cff9ae7a15a5). On
macOS the tests are failing when building release binaries with many
"The file was not recognized as a valid object file" errors, e.g.:

  2026-01-16T12:54:26.0928880Z

/Users/runner/work/llvm-project/llvm-project/build/tools/clang/stage2-instrumented-bins/tools/clang/stage2-bins/_CPack_Packages/Darwin/TXZ/LLVM-22.1.0-rc1-macOS-ARM64/bin/llvm-strip:
  error:

'/Users/runner/work/llvm-project/llvm-project/build/tools/clang/stage2-instrumented-bins/tools/clang/stage2-bins/_CPack_Packages/Darwin/TXZ/LLVM-22.1.0-rc1-macOS-ARM64/lib/libLLVMAArch64AsmParser.a(AArch64AsmParser.cpp.o)':
  The file was not recognized as a valid object file

It's assuming bitcode is embedded in section .llvm.lto
(llvm/lib/Object/ObjectFile.cpp:80) but on MachO it's in
__LLVM,__bitcode (llvm/lib/Object/MachOObjectFile.cpp:2184)

llvm-bitcode-strip is a driver for the MachO bitcode_strip utility which
handles this. Use this instead.

Fixes #176398.

Assisted-by: codex



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