rnk added subscribers: arphaman, dexonsmith.
rnk added a comment.

Seeking additional opinions on the PCH change: @dexonsmith @arphaman
The use case makes sense to me. It seems reasonable to me that the compiler 
shouldn't use the same PCH file with mismatched defines on the command line.



================
Comment at: clang/lib/Serialization/ASTReader.cpp:640-641
                                      const LangOptions &LangOpts,
-                                     bool Validate = true) {
+                                     bool Validate = true,
+                                     bool ValidateStrict = false) {
   // Check macro definitions.
----------------
These feel like they should be a "validation level" enum. Multiple optional 
boolean parameters in sequence is usually a hazard for future refactorings.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D126676/new/

https://reviews.llvm.org/D126676

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