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diff --git a/gcc/testsuite/g++.dg/overload/using2.C b/gcc/testsuite/g++.dg/overload/using2.C
new file mode 100644
index 00000000000..2ecb5fad6b0
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+++ b/gcc/testsuite/g++.dg/overload/using2.C
@@ -0,0 +1,87 @@
+// { dg-do compile }
+
+// Copyright 2005 Free Software Foundation
+// by Alexandre Oliva <aoliva@redhat.com>
+// based on https://bugzilla.redhat.com/beta/show_bug.cgi?id=149098
+
+// Per the ISO C++ 90 Standard, using declarations before of after a
+// declaration of the same function name and prototype should be
+// errors (7.3.3/11).  However, DR 101's resolution recommends
+// accepting such duplicates if they denote the same function, which
+// means extern "C" declarations are supposed to match and be
+// accepted.
+
+// This test makes sure we reject or accept regular and using
+// declarations regardless of order as appropriate, and that having
+// built-in declarations or overloads doesn't affet the outcome.
+
+namespace std {
+  extern "C" void exit (int) throw (); // these are built-in (extern "C")
+  extern "C" void *malloc (__SIZE_TYPE__) throw () __attribute__((malloc));
+
+  void abort (void) throw (); // these aren't
+  void _exit (int) throw (); // { dg-error "std::_exit" }
+
+  extern "C" void c1 (void) throw ();
+  void C1 (void) throw (); // { dg-error "std::C1" }
+
+  extern "C" void c2 (void) throw ();
+  void C2 (void) throw ();
+
+  extern "C" void c3 (void) throw ();
+  void C3 (void) throw (); // { dg-error "std::C3" }
+}
+
+namespace other {
+  extern "C" void c3 (void) throw ();
+  void C3 (void) throw (); // { dg-error "other::C3" }
+}
+
+using std::exit;
+using std::_exit;
+using std::c1;
+using std::C1;
+
+  extern "C" void exit (int) throw ();
+  extern "C" void *malloc (__SIZE_TYPE__) throw () __attribute__((malloc));
+
+  void abort (void) throw ();
+  void _exit (int) throw (); // { dg-error "conflicts|void _exit" }
+
+  extern "C" void c1 (void) throw ();
+  void C1 (void) throw (); // { dg-error "conflicts|void C1" }
+
+  extern "C" void c2 (void) throw ();
+  void C2 (void) throw ();
+
+  int C3 (int) throw ();
+
+using std::malloc;
+using std::abort; // { dg-error "already declared" }
+using std::c2;
+using std::C2; // { dg-error "already declared" }
+
+using std::c3; using other::c3;
+using std::C3; using other::C3;
+
+  long C3 (long) throw ();
+
+int main () {
+  malloc (0);
+  exit (0);
+
+  _exit (0); // { dg-error "ambiguous" }
+  abort ();
+
+  c1 ();
+  C1 (); // { dg-error "ambiguous" }
+
+  c2 ();
+  C2 (); // one might expect an ambiguous call error here as well, but
+	 // we don't add the using decl if we find it to be in error.
+
+  c3 ();
+  C3 (); // { dg-error "ambiguous" }
+  C3 (0);
+  C3 (0l);
+}