使用Ansible在Linux上安装Swift 3+libdispatch



我很难在Ubuntu 16.04上安装Swift 3.0和GCD。这在今天应该是可能的,对吧?

下面是一个Ansible任务,用于从Swift.org下载Swift 3,从GitHub克隆、构建和安装Swift corelibs-libdispatch。

即使libdispatch的安装完成时没有出现错误,它也不起作用。当我在Swift repl中尝试import Dispatch时,它抱怨缺少功能"块"。检查Makefiles确认,至少向编译器提供了标志-fblocks

以下是Swift repl:的示例输出

vagrant@swift3:/tmp/swift-3.0-PREVIEW-3-ubuntu15.10/usr/bin$ ./swift
Welcome to Swift version 3.0 (swift-3.0-PREVIEW-3). Type :help for assistance.
  1> 6 * 7
$R0: Int = 42
  2> import Dispatch
error: module 'CDispatch' requires feature 'blocks'
error: could not build Objective-C module 'CDispatch'
  2>  

用于设置盒子的流浪文件:

# -*- mode: ruby -*-
# vi: set ft=ruby :

Vagrant.configure(2) do |config|
    config.ssh.forward_agent = true
    config.vm.box = "bento/ubuntu-16.04"
    config.vm.define "swift3" do |dev|
        dev.vm.hostname = "swift3.dev"
    end
    config.vm.network :private_network, ip: "10.0.0.10"
    config.vm.provider "virtualbox" do |vb|
        vb.memory = "2048"
    end
    config.vm.provision "ansible" do |ansible|
        ansible.playbook = "ansible/main.yml"
    end
end

安装Swift 3:的可靠任务

---
- name: Install Swift 3 requirements
  apt: name={{ item }} state=installed
  with_items:
  - autoconf
  - clang
  - git
  - libblocksruntime-dev
  - libbsd-dev
  - libcurl4-openssl-dev
  - libdispatch-dev
  - libkqueue-dev
  - libpython2.7-dev
  - libtool
  - pkg-config

- name: download Swift 3
  get_url: url=https://swift.org/builds/swift-3.0-preview-3/ubuntu1510/swift-3.0-PREVIEW-3/swift-3.0-PREVIEW-3-ubuntu15.10.tar.gz
           dest=/tmp/swift.tgz mode=0440
- name: unarchive Swift 3
  unarchive: dest=/tmp src=/tmp/swift.tgz copy=no creates=/tmp/swift-3.0-PREVIEW-3-ubuntu15.10
- name: clone Swift 3 libdispatch core library
  git: repo=https://github.com/apple/swift-corelibs-libdispatch dest=/tmp/swift-corelibs-libdispatch
       version=swift-3.0-preview-3-branch force=true
- name: generate Swift 3 libdispatch build files
  command: "sh ./autogen.sh"
  args:
    chdir: /tmp/swift-corelibs-libdispatch
- name: configure Swift 3 libdispatch
  command: "sh ./configure --with-blocks-runtime=/usr/lib/x86_64-linux-gnu --with-swift-toolchain=/tmp/swift-3.0-PREVIEW-3-ubuntu15.10/usr --prefix=/tmp/swift-3.0-PREVIEW-3-ubuntu15.10/usr"
  args:
    chdir: /tmp/swift-corelibs-libdispatch
- name: make Swift 3 libdispatch
  command: "make"
  args:
    chdir: /tmp/swift-corelibs-libdispatch
- name: install Swift 3 libdispatch
  command: "make install"
  args:
    chdir: /tmp/swift-corelibs-libdispatch
- name: grant permissions to use Swift 3
  file: dest=/tmp/swift-3.0-PREVIEW-3-ubuntu15.10 mode=a+rX recurse=true

正如您所注意到的,在编译libdispatch时,-fblocks链接器标志被适当地设置。这很好,因为现在您有了libdispatch的工作版本。

不幸的是,您所做的任何包含Dispatch也是也将需要-fblocks链接器标志。

tl;dr的解决方案是在编译时简单地将-Xcc -fblocks提供给swiftc

正如我所说,这是一个变通办法。长期的解决方案是"ClangImporter:在非Darwin平台上启用-fblocks"。尽管上述工作是从你所在的地方到你想去的地方的最短距离,但在这之前,一切都会结束。

我自己补充一下,我只是使用上面pull请求中的补丁来修补我的本地构建。YMMV。

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