in Sources/SIL/SILPrinter.swift [478:499]
func print(_ linkage: Linkage) {
switch linkage {
case .hidden:
print("hidden ")
case .hiddenExternal:
print("hidden_external ")
case .private:
print("private ")
case .privateExternal:
print("private_external ")
case .public:
print("")
case .publicExternal:
print("public_external ")
case .publicNonABI:
print("non_abi ")
case .shared:
print("shared ")
case .sharedExternal:
print("shared_external ")
}
}