[libc++] Fix failing concepts tests
diff --git a/libcxx/test/std/concepts/lang/same_as.pass.cpp b/libcxx/test/std/concepts/lang/same_as.pass.cpp
index c41d6c4..76e019d 100644
--- a/libcxx/test/std/concepts/lang/same_as.pass.cpp
+++ b/libcxx/test/std/concepts/lang/same_as.pass.cpp
@@ -7,6 +7,7 @@
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
+// UNSUPPORTED: libcpp-no-concepts
// template<class T, class U>
// concept same_as;
diff --git a/libcxx/utils/libcxx/test/config.py b/libcxx/utils/libcxx/test/config.py
index 88010f8..b29910a 100644
--- a/libcxx/utils/libcxx/test/config.py
+++ b/libcxx/utils/libcxx/test/config.py
@@ -472,6 +472,10 @@
intMacroValue(macros['__cpp_deduction_guides']) < 201611:
self.config.available_features.add('libcpp-no-deduction-guides')
+ if '__cpp_concepts' not in macros or \
+ intMacroValue(macros['__cpp_concepts']) < 201811:
+ self.config.available_features.add('libcpp-no-concepts')
+
if self.target_info.is_windows():
self.config.available_features.add('windows')
if self.cxx_stdlib_under_test == 'libc++':
