Merge "libbinder_ndk: backwards compatible include_cpp"
diff --git a/libs/binder/ndk/include_cpp/android/binder_interface_utils.h b/libs/binder/ndk/include_cpp/android/binder_interface_utils.h
index 33e4586..f44ce0c 100644
--- a/libs/binder/ndk/include_cpp/android/binder_interface_utils.h
+++ b/libs/binder/ndk/include_cpp/android/binder_interface_utils.h
@@ -88,13 +88,21 @@
 
     static void operator delete(void* p) { std::free(p); }
 
+    // Once minSdkVersion is 30, we are guaranteed to be building with the
+    // Android 11 AIDL compiler which supports the SharedRefBase::make API.
+    //
+    // Use 'SharedRefBase::make<T>(...)' to make. SharedRefBase has implicit
+    // ownership. Making this operator private to avoid double-ownership.
+#if !defined(__ANDROID_API__) || __ANDROID_API__ >= 30
+   private:
+#else
+    [[deprecated("Prefer SharedRefBase::make<T>(...) if possible.")]]
+#endif
+    static void* operator new(size_t s) { return std::malloc(s); }
+
    private:
     std::once_flag mFlagThis;
     std::weak_ptr<SharedRefBase> mThis;
-
-    // Use 'SharedRefBase::make<T>(...)' to make. SharedRefBase has implicit
-    // ownership. Making this operator private to avoid double-ownership.
-    static void* operator new(size_t s) { return std::malloc(s); }
 };
 
 /**