1 files changed, 60 insertions, 1 deletions

diff --git a/test/SemaCXX/linkage-spec.cpp b/test/SemaCXX/linkage-spec.cpp
index 504df0d..1598d0e 100644
--- a/test/SemaCXX/linkage-spec.cpp
+++ b/test/SemaCXX/linkage-spec.cpp
@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 -fsyntax-only -verify %s
+// RUN: %clang_cc1 -fsyntax-only -verify -Wretained-language-linkage -DW_RETAINED_LANGUAGE_LINKAGE  %s
 extern "C" {
   extern "C" void f(int);
 }
@@ -41,7 +42,7 @@ namespace pr5430 {
 using namespace pr5430;
 extern "C" void pr5430::func(void) { }
 
-// PR5404
+// PR5405
 int f2(char *)
 {
         return 0;
@@ -55,6 +56,18 @@ extern "C"
     }
 }
 
+namespace PR5405 {
+  int f2b(char *) {
+    return 0;
+  }
+
+  extern "C" {
+    int f2b(int) {
+      return f2b((char *)0); // ok
+    }
+  }
+}
+
 // PR6991
 extern "C" typedef int (*PutcFunc_t)(int);
 
@@ -114,3 +127,49 @@ namespace pr14958 {
   }
   int js::ObjectClass;
 }
+
+extern "C" void PR16167; // expected-error {{variable has incomplete type 'void'}}
+extern void PR16167_0; // expected-error {{variable has incomplete type 'void'}}
+
+// PR7927
+enum T_7927 {
+  E_7927
+};
+
+extern "C" void f_pr7927(int);
+
+namespace {
+  extern "C" void f_pr7927(int);
+
+  void foo_pr7927() {
+    f_pr7927(E_7927);
+    f_pr7927(0);
+    ::f_pr7927(E_7927);
+    ::f_pr7927(0);
+  }
+}
+
+void bar_pr7927() {
+  f_pr7927(E_7927);
+  f_pr7927(0);
+  ::f_pr7927(E_7927);
+  ::f_pr7927(0);
+}
+
+namespace PR17337 {
+  extern "C++" {
+    class Foo;
+    extern "C" int bar3(Foo *y);
+    class Foo {
+      int x;
+      friend int bar3(Foo *y);
+#ifdef W_RETAINED_LANGUAGE_LINKAGE
+// expected-note@-5 {{previous declaration is here}}
+// expected-warning@-3 {{retaining previous language linkage}}
+#endif
+    };
+    extern "C" int bar3(Foo *y) {
+      return y->x;
+    }
+  }
+}