[PATCH] D121097: [C++20][Modules][HU 3/5] Emit module macros for header units.

[Iain Sandoe via Phabricator via cfe-commits]

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For header units we build the top level module directly from the header
that it represents and macros defined in this TU need to be emitted (when
such a definition is live at the end of the TU).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D121097

Files:
  clang/include/clang/Serialization/ASTWriter.h
  clang/lib/Serialization/ASTWriter.cpp
  clang/test/Modules/cxx20-hu-04.cpp

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