1 files changed, 28 insertions, 0 deletions
diff --git a/test/SemaCXX/libstdcxx_gets_hack.cpp b/test/SemaCXX/libstdcxx_gets_hack.cpp
new file mode 100644
index 000000000000..0d915d01474c
--- /dev/null
+++ b/test/SemaCXX/libstdcxx_gets_hack.cpp
@@ -0,0 +1,28 @@
+// RUN: %clang_cc1 -fsyntax-only %s -std=c++14 -verify
+
+// This is a test for an egregious hack in Clang that works around
+// an issue with libstdc++'s detection of whether glibc provides a
+// ::gets function. If there is no ::gets, ignore
+//   using ::gets;
+// in namespace std.
+//
+// See PR18402 and gcc.gnu.org/PR77795 for more details.
+
+#ifdef BE_THE_HEADER
+
+#pragma GCC system_header
+namespace std {
+  using ::gets;
+  using ::getx; // expected-error {{no member named 'getx'}}
+}
+
+#else
+
+#define BE_THE_HEADER
+#include "libstdcxx_pointer_return_false_hack.cpp"
+
+namespace foo {
+  using ::gets; // expected-error {{no member named 'gets'}}
+}
+
+#endif