================
@@ -6061,6 +6059,22 @@ ASTFileSignature ASTWriter::WriteASTCore(Sema *SemaPtr,
StringRef isysroot,
}
}
+ // Write the set of #pragma redefine_extname'd, undeclared identifiers. We
+ // always write the entire table, since later PCH files in a PCH chain are
+ // only interested in the results at the end of the chain.
+ RecordData ExtnameUndeclaredIdentifiers;
+ if (SemaPtr) {
----------------
divVerent wrote:
>From what I understand yes, it remains necessary.
Either textual includes remain a thing, then it remains necessary to be able to
make a module that has these pragmas a module, and still affect textual
includes after it.
Or they go away, then it becomes a necessity to use this _within_ a module's
implementation (which then will likely consist of other modules), or else the
"large autogenerated file that does all the symbol renaming" can't be a module
on its own and we still have to #include it.
https://github.com/llvm/llvm-project/pull/186755
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