diff --git a/llvm/utils/gn/build/libs/pthread/BUILD.gn b/llvm/utils/gn/build/libs/pthread/BUILD.gn
--- a/llvm/utils/gn/build/libs/pthread/BUILD.gn
+++ b/llvm/utils/gn/build/libs/pthread/BUILD.gn
@@ -5,9 +5,15 @@
   libs = [ "pthread" ]
 }
 
+config("pthread_link_time_config") {
+  visibility = [ ":pthread" ]
+  ldflags = [ "-pthread" ]
+}
+
 group("pthread") {
   # On Android, bionic has built-in support for pthreads.
   if (llvm_enable_threads && current_os != "win" && current_os != "android") {
     public_configs = [ ":pthread_config" ]
+    all_dependent_configs = [ ":pthread_link_time_config" ]
   }
 }