[PATCH] D103516: [clang][deps] Customize PCM path via -build-dir argument

[Jan Svoboda via Phabricator via cfe-commits]

jansvoboda11 created this revision.
jansvoboda11 added reviewers: Bigcheese, dexonsmith.
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Dependency scanning currently performs an implicit build. When testing that the command-lines produced for modular dependencies work when passed to Clang, they would overwrite the implicitly built PCM with an explicitly built PCM. This makes debugging harder than it should be.

This patch adds new flag to `clang-scan-deps` that allows developers to customize the PCM build directory, preventing file overwrites. Moreover, the explicit context hash is now part of the PCM path. This is useful in D102488 <https://reviews.llvm.org/D102488>, where the context hash can change due to command-line pruning.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D103516

Files:
  clang/test/ClangScanDeps/modules-full.cpp
  clang/tools/clang-scan-deps/ClangScanDeps.cpp

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