[swift-users] How to create custom module without the package manager?

Bee bee.ography at gmail.com
Sat Dec 12 08:50:17 CST 2015

Hi all,

I'd like to create my own simple custom module, but I don't want to use the
complicated package manager. Package manager is overkill for a simple
single source file module. So, here's what I've tried.

file: greet.swift

public func askName() {
print("What's your name? ")
let name = readLine()!
print("Hello, \(name)... good to see you!")

file: main.swift



$ swiftc -emit-library -emit-object greet.swift -module-name greet

emits greet.o

$ ar rcs libgreet.a greet.o

emits libgreet.a

$ swiftc -emit-module greet.swift -module-name greet

emits greet.swiftmodule and greet.swiftdoc

All went well, so I think now I already have had the "greet" module. Let's
try to use it…

file: test.swift

import greet


$ swiftc test.swift
clang: warning: argument unused during compilation: '-F/home/username'
/tmp/test-b63aab.o: In function `main':
/tmp/test-b63aab.o:(.text+0x41): undefined reference to
clang: error: linker command failed with exit code 1 (use -v to see
<unknown>:0: error: link command failed with exit code 1 (use -v to see

What's happening? What's wrong? How can I fix it?

Thank you.


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