[release/9.0] Remove Homebrew LLVM during macOS CI setup - Part 2#125789
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lewing merged 2 commits intodotnet:release/9.0from Mar 19, 2026
Merged
[release/9.0] Remove Homebrew LLVM during macOS CI setup - Part 2#125789lewing merged 2 commits intodotnet:release/9.0from
lewing merged 2 commits intodotnet:release/9.0from
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The CI runner image may ship with a Homebrew LLVM whose libraries (e.g., an x86_64-only libunwind.dylib in /usr/local/lib) conflict with the Apple SDK and break native linking. The build uses Apple clang from /usr/bin/clang exclusively and does not need Homebrew LLVM. Backport of dotnet#125763
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Pull request overview
Updates macOS dependency installation to proactively remove a preinstalled Homebrew LLVM that can conflict with Apple SDK libraries and break native linking in CI (backport of #125763).
Changes:
- Add a Homebrew
llvm@18uninstall step during macOS CI dependency setup. - Document why Homebrew LLVM is removed (wrong-arch/conflicting libraries; Apple clang is used).
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lewing
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Mar 19, 2026
This was referenced Mar 19, 2026
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The CI runner image may ship with a Homebrew LLVM whose libraries (e.g., an x86_64-only libunwind.dylib in /usr/local/lib) conflict with the Apple SDK and break native linking. The build uses Apple clang from /usr/bin/clang exclusively and does not need Homebrew LLVM.
Backport of #125763