[PATCH] D139168: [C++20] [Modules] [ClangScanDeps] Enable to print make-style dependency file within P1689 format (4/4)

[Chuanqi Xu via Phabricator via cfe-commits]

ChuanqiXu created this revision.
ChuanqiXu added reviewers: ben.boeckel, Bigcheese, jansvoboda11.
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Required in https://reviews.llvm.org/D137534.

The build systems needs the information to know that "header X changed, scanning may have changed, so please rerun scanning". Although it is possible to get the information by running clang-scan-deps for the second time with make format, it is not user friendly clearly.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D139168

Files:
  clang/include/clang/Tooling/DependencyScanning/DependencyScanningTool.h
  clang/lib/Tooling/DependencyScanning/DependencyScanningTool.cpp
  clang/test/ClangScanDeps/P1689.cppm
  clang/tools/clang-scan-deps/ClangScanDeps.cpp

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