[gn build] Reland 5082c330138: (semimanually) port ebc31d2.

diff --git a/llvm/utils/gn/secondary/compiler-rt/lib/asan/BUILD.gn b/llvm/utils/gn/secondary/compiler-rt/lib/asan/BUILD.gn
index 3f679c9..c741175 100644 (file)
--- a/llvm/utils/gn/secondary/compiler-rt/lib/asan/BUILD.gn
+++ b/llvm/utils/gn/secondary/compiler-rt/lib/asan/BUILD.gn
@@ -99,7 +99,11 @@ target(asan_target_type, "asan") {
     "asan_win.cpp",
   ]
   if (target_os != "mac" && target_os != "win") {
-    sources += [ "asan_interceptors_vfork.S" ]
+    sources += [
+      "asan_interceptors_vfork.S",
+      "asan_rtl_x86_64.S",
+
+    ]
   }
 
   # To be able to include sanitizer_common.