Add Clang compilation CI job on Ubuntu#2926
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soutaro merged 2 commits intoruby:masterfrom Apr 8, 2026
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Add a clang_compile job to verify that the C extension compiles cleanly with Clang, enabling nullability checks via -Wnullable-to-nonnull-conversion. The job runs on macOS where Ruby is built with Apple Clang, so mkmf's flag checks use the correct compiler. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
soutaro
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Apr 8, 2026
| - run: bundle exec rake clean compile_c99 | ||
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| clang_compile: | ||
| runs-on: macos-latest |
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We use macos runner, not ubuntu, to make sure ruby is built with clang.
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Summary
clang_compilejob to the Ruby CI workflow that compiles the C extension with Clang on macOSRBS_NULLABLE/RBS_NONNULL) expand to_Nullable/_Nonnullonly on Clang — this job ensures they are actually checked in CImacos-latestwhere Ruby is built with Apple ClangTest plan
clang_compilejob runs and passes-Wnullable-to-nonnull-conversionis accepted as CFLAGS🤖 Generated with Claude Code