[PATCH] D85924: [clang] Add __RELATIVE_CXX_ABI_VTABLES predefine macro

[Roland McGrath via Phabricator via cfe-commits]

mcgrathr added inline comments.


================
Comment at: clang/lib/Frontend/InitPreprocessor.cpp:1127
 
+  if (LangOpts.RelativeCXXABIVTables)
+    Builder.defineMacro("__RELATIVE_CXX_ABI_VTABLES");
----------------
This should also test `LangOpts.CplusPlus` so it's never defined in C compilation.

I don't know what precedents there are to follow for how to choose the exact name here.
Having something like `__CXX_ABI_` be a prefix for all such things seems wise.



Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D85924/new/

https://reviews.llvm.org/D85924