Index: runtime/test/lit.cfg
===================================================================
--- runtime/test/lit.cfg
+++ runtime/test/lit.cfg
@@ -53,6 +53,8 @@
     libs += " -lm"
 if config.has_libatomic:
     libs += " -latomic"
+elif 'clang' in config.test_compiler_features:
+    config.unsupported = True
 
 # Allow XFAIL to work
 config.target_triple = [ ]