I think the question that must be answered first is: Are County Public Libraries a government entity or a public entity.
I know the libraries are open to the public and take public donations, but so are city parks.
I also know that the libraries, at least in Wake County, are primarily county funded and regulated by the county. So, that would tell me that with the current statutes of not carrying in government buildings, which the library is also a "safe house", wouldn't that immediately make the library off limits?
Love the term "safe house", what better way to advertise that there are no firearms on the premises. Then again, how often have you heard of a library getting robbed. Then again, not all criminals are trying to rob you. Am I going off in a tangent? I'd better stop....