Index: libcxx/utils/libcxx/test/config.py
===================================================================
--- libcxx/utils/libcxx/test/config.py
+++ libcxx/utils/libcxx/test/config.py
@@ -900,6 +900,10 @@
             '-D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER',
             '-Wall', '-Wextra', '-Werror'
         ]
+
+        if self.cxx.hasWarningFlag('-Wno-tautological-type-limit-compare'):
+            self.cxx.warning_flags += ['-Wno-tautological-type-limit-compare',]
+
         if self.cxx.hasWarningFlag('-Wuser-defined-warnings'):
             self.cxx.warning_flags += ['-Wuser-defined-warnings']
             self.config.available_features.add('diagnose-if-support')