diff -Naur clang-12.0.0rc1.src.orig/lib/Driver/ToolChain.cpp clang-12.0.0rc1.src/lib/Driver/ToolChain.cpp
--- clang-12.0.0rc1.src.orig/lib/Driver/ToolChain.cpp	2021-02-15 21:40:55.000000000 +0100
+++ clang-12.0.0rc1.src/lib/Driver/ToolChain.cpp	2021-02-16 07:35:01.000000000 +0100
@@ -257,7 +257,7 @@
 }
 
 bool ToolChain::IsUnwindTablesDefault(const ArgList &Args) const {
-  return false;
+  return true;
 }
 
 Tool *ToolChain::getClang() const {
diff -Naur clang-12.0.0rc1.src.orig/lib/Driver/ToolChains/Gnu.cpp clang-12.0.0rc1.src/lib/Driver/ToolChains/Gnu.cpp
--- clang-12.0.0rc1.src.orig/lib/Driver/ToolChains/Gnu.cpp	2021-02-15 21:40:55.000000000 +0100
+++ clang-12.0.0rc1.src/lib/Driver/ToolChains/Gnu.cpp	2021-02-16 07:35:30.000000000 +0100
@@ -2713,7 +2713,7 @@
   case llvm::Triple::x86_64:
     return true;
   default:
-    return false;
+    return true;
   }
 }