remove "pub" from your godbolt. Zig/godbolt is identifying that you're trying to build a full program and so it brings in a lot of the boilerplate necessary to

remove "pub" from your godbolt. Zig/godbolt is identifying that you're trying to build a full program and so it brings in a lot of the boilerplate necessary to launch a program (for example, the panic handler, stdlib stuff to format strings for the panic handler, etc).