[llvm-branch-commits] Prepare libcxx and libcxxabi for pointer field protection. (PR #151651)

[Nikolas Klauser via llvm-branch-commits]

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@@ -484,8 +484,21 @@ typedef __char32_t char32_t;
 #    define _LIBCPP_EXCEPTIONS_SIG e
 #  endif
 
+#  if !_LIBCPP_HAS_EXCEPTIONS
+#    define _LIBCPP_EXCEPTIONS_SIG n
+#  else
+#    define _LIBCPP_EXCEPTIONS_SIG e
+#  endif
+
+#  if defined(__POINTER_FIELD_PROTECTION__)
+#    define _LIBCPP_PFP_SIG p
+#  else
+#    define _LIBCPP_PFP_SIG
+#  endif
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philnik777 wrote:

My understanding is that pfp changes the layout of certain types? Why should there be an ABI tag for it?

https://github.com/llvm/llvm-project/pull/151651