--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.target/i386/mv13.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,18 @@
+// Test case to check if multiversioning functions that are extern "C"
+// generates errors.
+
+// { dg-do compile }
+
+extern "C"
+__attribute__ ((target ("default")))
+int foo ()  // { dg-message "previously defined here" }
+{
+  return 0;
+}
+
+extern "C"
+__attribute__ ((target ("sse4.2")))
+int foo () // { dg-error "redefinition" }
+{
+  return 1;
+}