Building v8 and adding it to C++ projects

I followed this websites guide, together with a few old stackoverflow posts:
https://v8.dev/docs/source-code

Issue in getting Value resolved by v8::Local

I have following code

Issue in getting Value resolved by v8::Local

I have following code

Issue in converting v8::Local to v8::Local

I have a v8 method which returns type v8::Local<v8::Data> , i want to convert this to type v8::Local<v8::Value> , Value is a Child class of Data ref