Do not give implicitly-defined virtual members functions
available_externally linkage, since they may not have been given a
strong definition in another translation unit. Without this patch, the
following test case fails to link with a GCC-compiled libstdc++:
#include <sstream>
int main() { std::basic_stringbuf<char> bs; }
Fixes the last problem with the Boost.IO library.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@103208 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGenCXX/template-linkage.cpp b/test/CodeGenCXX/template-linkage.cpp
index ccd61a7..63a5c09 100644
--- a/test/CodeGenCXX/template-linkage.cpp
+++ b/test/CodeGenCXX/template-linkage.cpp
@@ -22,3 +22,23 @@
template <typename T> inline void g(T) { }
template void g<int>(int);
+template<typename T>
+struct X0 {
+ virtual ~X0() { }
+};
+
+template<typename T>
+struct X1 : X0<T> {
+ virtual void blarg();
+};
+
+template<typename T> void X1<T>::blarg() { }
+
+extern template struct X0<char>;
+extern template struct X1<char>;
+
+// CHECK: define linkonce_odr void @_ZN2X1IcED1Ev(
+void test_X1() {
+ X1<char> i1c;
+}
+