diff --git a/llvm/utils/gn/secondary/lld/MachO/BUILD.gn b/llvm/utils/gn/secondary/lld/MachO/BUILD.gn
index 52d54d6b4e574..5e163d1a132d9 100644
--- a/llvm/utils/gn/secondary/lld/MachO/BUILD.gn
+++ b/llvm/utils/gn/secondary/lld/MachO/BUILD.gn
@@ -28,6 +28,7 @@ static_library("MachO2") {
     "ExportTrie.cpp",
     "InputFiles.cpp",
     "InputSection.cpp",
+    "LTO.cpp",
     "MergedOutputSection.cpp",
     "ObjC.cpp",
     "OutputSection.cpp",
diff --git a/llvm/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn b/llvm/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
index 1ef33cd177a23..8e0f9225e0f5e 100644
--- a/llvm/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
@@ -190,6 +190,18 @@ write_cmake_config("config") {
     ]
   }
 
+  if (current_os == "win" || current_cpu == "arm") {
+    values += [
+      "HAVE_DEREGISTER_FRAME=",
+      "HAVE_REGISTER_FRAME=",
+    ]
+  } else {
+    values += [
+      "HAVE_DEREGISTER_FRAME=1",
+      "HAVE_REGISTER_FRAME=1",
+    ]
+  }
+
   if (current_os == "win") {
     values += [
       "HAVE_DECL_STRERROR_S=1",