Implement dcl.link paragraph 5.

The language linkage of redeclarations must match. GCC was already reporting
an error for this.

llvm-svn: 171139

1 files changed, 13 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/linkage2.cpp b/clang/test/SemaCXX/linkage2.cpp
new file mode 100644
index 00000000000..ccf32008f13
--- /dev/null
+++ b/clang/test/SemaCXX/linkage2.cpp
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+namespace test1 {
+  int x; // expected-note {{previous definition is here}}
+  static int y; // expected-note {{previous definition is here}}
+  void f() {} // expected-note {{previous definition is here}}
+
+  extern "C" {
+    extern int x; // expected-error {{declaration of 'x' has a different language linkage}}
+    extern int y; // expected-error {{declaration of 'y' has a different language linkage}}
+    void f(); // expected-error {{declaration of 'f' has a different language linkage}}
+  }
+}