rbenv无法安装ruby 2.2.5和2.3.1

Question

我跑brew update和brew upgrade rbenv ruby-build。仅供参考：昨天我将xcode更新到8.1版。

我检查了可用的版本，rbenv install -l。

然后我尝试通过rbenv install 2.2.5安装ruby2.2.5，然后我收到以下错误。

我试过2.3.1但是我得到了同样的错误。我该如何解决这个问题？

Downloading ruby-2.2.5.tar.bz2...
-> https://cache.ruby-lang.org/pub/ruby/2.2/ruby-2.2.5.tar.bz2
Installing ruby-2.2.5...

BUILD FAILED (OS X 10.11.6 using ruby-build 20160602)

Inspect or clean up the working tree at /var/folders/2p/49l6q0gs6qzgtxbg4h1st_5h0000gq/T/ruby-build.20161106122840.51330
Results logged to /var/folders/2p/49l6q0gs6qzgtxbg4h1st_5h0000gq/T/ruby-build.20161106122840.51330.log

Last 10 log lines:
  Referenced from: /private/var/folders/2p/49l6q0gs6qzgtxbg4h1st_5h0000gq/T/ruby-build.20161106122840.51330/ruby-2.2.5/./miniruby (which was built for Mac OS X 10.12)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: _clock_gettime
  Referenced from: /private/var/folders/2p/49l6q0gs6qzgtxbg4h1st_5h0000gq/T/ruby-build.20161106122840.51330/ruby-2.2.5/./miniruby (which was built for Mac OS X 10.12)
  Expected in: /usr/lib/libSystem.B.dylib

make: *** [encdb.h] Trace/BPT trap: 5
make: *** Waiting for unfinished jobs....
make: *** [.rbconfig.time] Trace/BPT trap: 5

Answer 1

首先，我已经卸载了所有：

brew uninstall rbenv ruby-build

并且由于旧的粘性ruby-build安装，我强迫这样：

brew uninstall --force ruby-build

当我输入ruby -v时，我可以看到rbenv的旧调用。所以我从$HOME/.bash_profile删除所有rbenv引用，然后重新加载它：

source $HOME/.bash_profile

现在我只看到我的旧默认MacO ruby​​版本：

ruby -v     # ruby 2.0.0p481 (2014-05-08 revision 45883)
which ruby  # /usr/bin/ruby

好！现在是时候再次安装它们然后列出可用的Ruby版本：

brew install rbenv

rbenv install -l

我现在可以看到更多的Ruby选项来安装......

2.2.4, 2.2.5, 2.2.6, 2.2.7, 2.2.8, 2.2.9, 2.3.0, 2.3.1, 2.3.2, 2.3.3, 2.3.4, 2.3.5, 2.3.6, 2.4.0, 2.4.1, 2.4.2, 2.4.3, 2.5.0

我将选择其中一个并使其成为全局：

rbenv install 2.5.0
rbenv global 2.5.0

我的情况你还没有$HOME/.bash_profile rbenv配置行，运行：

rbenv init

...并将结果行添加到$HOME/.bash_profile。

Answer 2

我试着升级rbenv。

brew upgrade rbenv

然后我收到了警告。

Warning: You have Xcode 8 installed without the CLT;
this causes certain builds to fail on OS X El Capitan (10.11).
Please install the CLT via:
  sudo xcode-select --install
Error: rbenv 1.0.0 already installed

所以我安装了xcode-select。

sudo xcode-select --install

然后我尝试升级rbenv但已经安装了rbenv 1.0.0。

brew upgrade rbenv
Error: rbenv 1.0.0 already installed

所以我尝试安装2.3.1和2.2.5

rbenv install 2.3.1
...
rbenv install 2.2.5

这是成功的。

➜  ~ rbenv versions
  system
  1.9.3-p327
* 2.2.2 (set by /Users/sokada/.rbenv/version)
  2.2.5
  2.3.1

我也需要安装捆绑包，因为我从使用bundle来解决这个问题。

gem install bundler -v 1.13.6 // newest as of this writing
bundler -v
bundler install // finally I could use it.

Answer 3

这是一个非常古老的问题。但是，我认为正确的方法是升级ruby-build。它可以作为rbenv的插件提供，它提供了rbenv install命令。所以要解决这个问题，请遵循以下方法：https://github.com/rbenv/ruby-build#upgrading

# Via Homebrew
$ brew update && brew upgrade ruby-build