Index: test/lit.cfg
===================================================================
--- test/lit.cfg
+++ test/lit.cfg
@@ -455,7 +455,8 @@
     config.available_features.add('ld_plugin')
 
 def have_ld64_plugin_support():
-    if config.ld64_executable == '':
+    if (not os.path.exists(os.path.join(config.llvm_lib_dir, 'libLTO.dylib')) or
+        config.ld64_executable == ''):
         return False
 
     ld_cmd = subprocess.Popen([config.ld64_executable, '-v'], stderr = subprocess.PIPE)