[PATCH] D103519: [clang][deps] Support object files

[Jan Svoboda via Phabricator via cfe-commits]

jansvoboda11 created this revision.
jansvoboda11 added reviewers: Bigcheese, dexonsmith.
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When a project uses PCH with explicit modules, the build will look like this:

1. scan PCH dependencies
2. explicitly build PCH
3. scan TU dependencies
4. explicitly build TU

Step 2 produces an object file for the PCH, which the dependency scanner needs to read in step 3.

This patch adds support for object files to the dependency scanner.

The `clang-scan-deps` invocation in the attached test would fail without this change.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D103519

Files:
  clang/lib/Tooling/DependencyScanning/CMakeLists.txt
  clang/lib/Tooling/DependencyScanning/DependencyScanningService.cpp
  clang/lib/Tooling/DependencyScanning/DependencyScanningWorker.cpp
  clang/test/ClangScanDeps/Inputs/modules-pch/cdb_tu.json
  clang/test/ClangScanDeps/Inputs/modules-pch/mod_tu.h
  clang/test/ClangScanDeps/Inputs/modules-pch/module.modulemap
  clang/test/ClangScanDeps/Inputs/modules-pch/pch.h
  clang/test/ClangScanDeps/Inputs/modules-pch/tu.c
  clang/test/ClangScanDeps/modules-pch.c

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