================
@@ -507,6 +507,21 @@ static int dl_iterate_phdr_cb(dl_phdr_info *info, size_t 
size, void *arg) {
   return 0;
 }
 
+#if LLVM_ENABLE_DEBUGLOC_ORIGIN_TRACKING
+#if !defined(HAVE_BACKTRACE)
+#error DebugLoc origin-tracking currently requires `backtrace()`.
+#endif
----------------
jmorse wrote:

Can this instead be a cmake check? (I've no idea how to achieve that, it just 
might be more convenient to developers to fail-early-fail-hard).

https://github.com/llvm/llvm-project/pull/143591
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