It's been over a year and no solutions have been merged! The problem just popped up again in Firefox after a pull. With clang 13.0, and the discussion above was before 11.0 release >_<

In D77776#2187273, @dim wrote:

+#ifdef __FreeBSD__
+	  return __FreeBSD_version / 100000;
+#else
+	  return 10;
+#endif

No, that would hardcode something at build time. We need to respect whatever triple the user is passing in.

ping. can we get *some* solution to this included in llvm 11.0 final release?

With TBI enabled in the system, HWASAN should also work, I've had it running some time ago

Looks like D74765 is the new version of this.

But the default should indeed be either the host version