[release/9.0] Remove Homebrew LLVM during macOS CI setup#125785
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rbhanda merged 1 commit intodotnet:release/9.0from Mar 19, 2026
Merged
[release/9.0] Remove Homebrew LLVM during macOS CI setup#125785rbhanda merged 1 commit intodotnet:release/9.0from
rbhanda merged 1 commit 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
This PR updates the macOS CI native-dependency setup script to proactively remove any Homebrew-provided LLVM, which can introduce conflicting libraries (e.g., libunwind.dylib) and break native linking when the build is intended to use Apple clang from /usr/bin/clang.
Changes:
- Uninstall Homebrew
llvm(if present) during macOS CI dependency setup to prevent linker conflicts. - Add explanatory comments documenting the failure mode and rationale.
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steveisok
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rbhanda
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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