llvm-project

4b8d665a - [clang][deps] Report directory dependencies of modules to build systems (#229559)

[clang][deps] Report directory dependencies of modules to build systems (#229559) Validating directory dependencies inside the compiler means walking every directory whenever a module is loaded. A build system already watches the file system, so let it do that instead. The dependency scanner now reports the directories each module depends on the listing of, and a build system can pass back the ones that changed on later incremental scans, so that cached scanning modules depending on them are rebuilt. The API takes paths rather than directories so that files can be reported the same way in the future, but only directories are checked for now. This is supported by clang-scan-deps via `directory-deps` in the `experimental-full` output and the `-invalidated-path=` flag. Assisted-by: Claude Code: opus-5.5