diff --git a/cppwinrt/code_writers.h b/cppwinrt/code_writers.h
index d84abeecf..ae2920d56 100644
--- a/cppwinrt/code_writers.h
+++ b/cppwinrt/code_writers.h
@@ -763,7 +763,7 @@ namespace cppwinrt
         {
             auto format = R"(    template <> struct abi<%>
     {
-        struct WINRT_IMPL_NOVTABLE type : inspectable_abi
+        struct WINRT_IMPL_ABI_DECL type : inspectable_abi
         {
 )";
 
@@ -773,7 +773,7 @@ namespace cppwinrt
         {
             auto format = R"(    template <%> struct abi<%>
     {
-        struct WINRT_IMPL_NOVTABLE type : inspectable_abi
+        struct WINRT_IMPL_ABI_DECL type : inspectable_abi
         {
 )";
 
@@ -814,7 +814,7 @@ namespace cppwinrt
     {
         auto format = R"(    template <%> struct abi<%>
     {
-        struct WINRT_IMPL_NOVTABLE type : unknown_abi
+        struct WINRT_IMPL_ABI_DECL type : unknown_abi
         {
             virtual int32_t __stdcall Invoke(%) noexcept = 0;
         };
diff --git a/strings/base_abi.h b/strings/base_abi.h
index d1eab2950..ec42fefe6 100644
--- a/strings/base_abi.h
+++ b/strings/base_abi.h
@@ -3,7 +3,7 @@ namespace winrt::impl
 {
     template <> struct abi<Windows::Foundation::IUnknown>
     {
-        struct WINRT_IMPL_NOVTABLE type
+        struct WINRT_IMPL_ABI_DECL type
         {
             virtual int32_t __stdcall QueryInterface(guid const& id, void** object) noexcept = 0;
             virtual uint32_t __stdcall AddRef() noexcept = 0;
@@ -15,7 +15,7 @@ namespace winrt::impl
 
     template <> struct abi<Windows::Foundation::IInspectable>
     {
-        struct WINRT_IMPL_NOVTABLE type : unknown_abi
+        struct WINRT_IMPL_ABI_DECL type : unknown_abi
         {
             virtual int32_t __stdcall GetIids(uint32_t* count, guid** ids) noexcept = 0;
             virtual int32_t __stdcall GetRuntimeClassName(void** name) noexcept = 0;
@@ -27,20 +27,20 @@ namespace winrt::impl
 
     template <> struct abi<Windows::Foundation::IActivationFactory>
     {
-        struct WINRT_IMPL_NOVTABLE type : inspectable_abi
+        struct WINRT_IMPL_ABI_DECL type : inspectable_abi
         {
             virtual int32_t __stdcall ActivateInstance(void** instance) noexcept = 0;
         };
     };
 
-    struct WINRT_IMPL_NOVTABLE IAgileObject : unknown_abi {};
+    struct WINRT_IMPL_ABI_DECL IAgileObject : unknown_abi {};
 
-    struct WINRT_IMPL_NOVTABLE IAgileReference : unknown_abi
+    struct WINRT_IMPL_ABI_DECL IAgileReference : unknown_abi
     {
         virtual int32_t __stdcall Resolve(guid const& id, void** object) noexcept = 0;
     };
 
-    struct WINRT_IMPL_NOVTABLE IMarshal : unknown_abi
+    struct WINRT_IMPL_ABI_DECL IMarshal : unknown_abi
     {
         virtual int32_t __stdcall GetUnmarshalClass(guid const& riid, void* pv, uint32_t dwDestContext, void* pvDestContext, uint32_t mshlflags, guid* pCid) noexcept = 0;
         virtual int32_t __stdcall GetMarshalSizeMax(guid const& riid, void* pv, uint32_t dwDestContext, void* pvDestContext, uint32_t mshlflags, uint32_t* pSize) noexcept = 0;
@@ -50,20 +50,20 @@ namespace winrt::impl
         virtual int32_t __stdcall DisconnectObject(uint32_t dwReserved) noexcept = 0;
     };
 
-    struct WINRT_IMPL_NOVTABLE IGlobalInterfaceTable : unknown_abi
+    struct WINRT_IMPL_ABI_DECL IGlobalInterfaceTable : unknown_abi
     {
         virtual int32_t __stdcall RegisterInterfaceInGlobal(void* object, guid const& iid, uint32_t* cookie) noexcept = 0;
         virtual int32_t __stdcall RevokeInterfaceFromGlobal(uint32_t cookie) noexcept = 0;
         virtual int32_t __stdcall GetInterfaceFromGlobal(uint32_t cookie, guid const& iid, void** object) noexcept = 0;
     };
 
-    struct WINRT_IMPL_NOVTABLE IStaticLifetime : inspectable_abi
+    struct WINRT_IMPL_ABI_DECL IStaticLifetime : inspectable_abi
     {
         virtual int32_t __stdcall unused() noexcept = 0;
         virtual int32_t __stdcall GetCollection(void** value) noexcept = 0;
     };
 
-    struct WINRT_IMPL_NOVTABLE IStaticLifetimeCollection : inspectable_abi
+    struct WINRT_IMPL_ABI_DECL IStaticLifetimeCollection : inspectable_abi
     {
         virtual int32_t __stdcall Lookup(void*, void**) noexcept = 0;
         virtual int32_t __stdcall unused() noexcept = 0;
@@ -74,23 +74,23 @@ namespace winrt::impl
         virtual int32_t __stdcall unused4() noexcept = 0;
     };
 
-    struct WINRT_IMPL_NOVTABLE IWeakReference : unknown_abi
+    struct WINRT_IMPL_ABI_DECL IWeakReference : unknown_abi
     {
         virtual int32_t __stdcall Resolve(guid const& iid, void** objectReference) noexcept = 0;
     };
 
-    struct WINRT_IMPL_NOVTABLE IWeakReferenceSource : unknown_abi
+    struct WINRT_IMPL_ABI_DECL IWeakReferenceSource : unknown_abi
     {
         virtual int32_t __stdcall GetWeakReference(IWeakReference** weakReference) noexcept = 0;
     };
 
-    struct WINRT_IMPL_NOVTABLE IRestrictedErrorInfo : unknown_abi
+    struct WINRT_IMPL_ABI_DECL IRestrictedErrorInfo : unknown_abi
     {
         virtual int32_t __stdcall GetErrorDetails(bstr* description, int32_t* error, bstr* restrictedDescription, bstr* capabilitySid) noexcept = 0;
         virtual int32_t __stdcall GetReference(bstr* reference) noexcept = 0;
     };
 
-    struct WINRT_IMPL_NOVTABLE IErrorInfo : unknown_abi
+    struct WINRT_IMPL_ABI_DECL IErrorInfo : unknown_abi
     {
         virtual int32_t __stdcall GetGUID(guid* value) noexcept = 0;
         virtual int32_t __stdcall GetSource(bstr* value) noexcept = 0;
@@ -99,7 +99,7 @@ namespace winrt::impl
         virtual int32_t __stdcall GetHelpContext(uint32_t* value) noexcept = 0;
     };
 
-    struct WINRT_IMPL_NOVTABLE ILanguageExceptionErrorInfo2 : unknown_abi
+    struct WINRT_IMPL_ABI_DECL ILanguageExceptionErrorInfo2 : unknown_abi
     {
         virtual int32_t __stdcall GetLanguageException(void** exception) noexcept = 0;
         virtual int32_t __stdcall GetPreviousLanguageExceptionErrorInfo(ILanguageExceptionErrorInfo2** previous) noexcept = 0;
@@ -109,12 +109,12 @@ namespace winrt::impl
 
     struct ICallbackWithNoReentrancyToApplicationSTA;
 
-    struct WINRT_IMPL_NOVTABLE IContextCallback : unknown_abi
+    struct WINRT_IMPL_ABI_DECL IContextCallback : unknown_abi
     {
         virtual int32_t __stdcall ContextCallback(int32_t(__stdcall* callback)(com_callback_args*), com_callback_args* args, guid const& iid, int method, void* reserved) noexcept = 0;
     };
 
-    struct WINRT_IMPL_NOVTABLE IServerSecurity : unknown_abi
+    struct WINRT_IMPL_ABI_DECL IServerSecurity : unknown_abi
     {
         virtual int32_t __stdcall QueryBlanket(uint32_t*, uint32_t*, wchar_t**, uint32_t*, uint32_t*, void**, uint32_t*) noexcept = 0;
         virtual int32_t __stdcall ImpersonateClient() noexcept = 0;
@@ -122,12 +122,12 @@ namespace winrt::impl
         virtual int32_t __stdcall IsImpersonating() noexcept = 0;
     };
 
-    struct WINRT_IMPL_NOVTABLE IBufferByteAccess : unknown_abi
+    struct WINRT_IMPL_ABI_DECL IBufferByteAccess : unknown_abi
     {
         virtual int32_t __stdcall Buffer(uint8_t** value) noexcept = 0;
     };
 
-    struct WINRT_IMPL_NOVTABLE IMemoryBufferByteAccess : unknown_abi
+    struct WINRT_IMPL_ABI_DECL IMemoryBufferByteAccess : unknown_abi
     {
         virtual int32_t __stdcall GetBuffer(uint8_t** value, uint32_t* capacity) noexcept = 0;
     };
diff --git a/strings/base_delegate.h b/strings/base_delegate.h
index 8902b3cc6..3d1457c2e 100644
--- a/strings/base_delegate.h
+++ b/strings/base_delegate.h
@@ -109,7 +109,7 @@ namespace winrt::impl
     }
 
     template <typename R, typename... Args>
-    struct WINRT_IMPL_NOVTABLE variadic_delegate_abi : unknown_abi
+    struct WINRT_IMPL_ABI_DECL variadic_delegate_abi : unknown_abi
     {
         virtual R invoke(Args const& ...) = 0;
     };
diff --git a/strings/base_fast_forward.h b/strings/base_fast_forward.h
index 88d99469a..7291ab2af 100644
--- a/strings/base_fast_forward.h
+++ b/strings/base_fast_forward.h
@@ -10,6 +10,12 @@
 #define WINRT_IMPL_FF_NOVTABLE
 #endif
 
+#if defined(__clang__) && __has_attribute(__lto_visibility_public__)
+#define WINRT_IMPL_FF_PUBLIC __attribute__((lto_visibility_public))
+#else
+#define WINRT_IMPL_FF_PUBLIC
+#endif
+
 #if !defined(WINRT_FAST_ABI_SIZE)
 #define WINRT_FAST_ABI_SIZE %
 #endif
@@ -36,7 +42,7 @@ namespace winrt::impl
             }
         };
 
-        struct WINRT_IMPL_FF_NOVTABLE inspectable
+        struct WINRT_IMPL_FF_NOVTABLE WINRT_IMPL_FF_PUBLIC inspectable
         {
             virtual int32_t __stdcall QueryInterface(guid const& id, void** object) noexcept = 0;
             virtual uint32_t __stdcall AddRef() noexcept = 0;
@@ -137,3 +143,4 @@ namespace winrt
 #undef WINRT_IMPL_STRING
 #undef WINRT_IMPL_STRING_1
 #undef WINRT_IMPL_FF_NOVTABLE
+#undef WINRT_IMPL_FF_PUBLIC
diff --git a/strings/base_macros.h b/strings/base_macros.h
index d9e19547e..42e958649 100644
--- a/strings/base_macros.h
+++ b/strings/base_macros.h
@@ -61,6 +61,14 @@
 #define WINRT_IMPL_NOVTABLE
 #endif
 
+#if defined(__clang__) && __has_attribute(__lto_visibility_public__)
+#define WINRT_IMPL_PUBLIC __attribute__((lto_visibility_public))
+#else
+#define WINRT_IMPL_PUBLIC
+#endif
+
+#define WINRT_IMPL_ABI_DECL WINRT_IMPL_NOVTABLE WINRT_IMPL_PUBLIC
+
 #if defined(__clang__)
 #define WINRT_IMPL_HAS_DECLSPEC_UUID __has_declspec_attribute(uuid)
 #elif defined(_MSC_VER)