================
@@ -41,9 +43,10 @@ Base::~Base() {}
 // CHECK: @_ZTSW3Mod4Base = constant
 // CHECK: @_ZTIW3Mod4Base = constant
 
-// CHECK-INLINE: @_ZTVW3Mod4Base = linkonce_odr {{.*}}unnamed_addr constant
-// CHECK-INLINE: @_ZTSW3Mod4Base = linkonce_odr {{.*}}constant
-// CHECK-INLINE: @_ZTIW3Mod4Base = linkonce_odr {{.*}}constant
+// With the new Itanium C++ ABI, the linkage of vtables in modules don't need 
to be linkonce ODR.
----------------
ChuanqiXu9 wrote:

While I agree `weak` may work here, I feel it is odd. I feel the default strong 
linkage seems better when it is applicable. What's the advance to use `weak` 
linkage here?

https://github.com/llvm/llvm-project/pull/75912
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