@ono, In terms of using an existing library, if it is a C++ library this works great. If the library was written using Qt it will need to be migrated to CopperSpice. This has already been done for a few libraries.
Our CS team has experience with library migration and we are available to help with this process.
@ono, Can you could let us know which existing libraries you are using. We know a few have already been migrated to CopperSpice and we are happy to review the process for adding other libraries.