Jekyll 服务失败（Ruby 不兼容的库版本）
Jekyll fails to serve (Ruby incompatible library version)
当尝试 运行 jekyll serve 时，它似乎构建正确（尽管有我无法解决的警告），但随后无法提供服务。 jekyll build 完成，但生成的文件缺少已编译的 CSS。
来自jekyll serve的输出：
Ignoring ffi-1.9.10 because its extensions are not built. Try: gem pristine ffi --version 1.9.10
Ignoring curb-0.9.3 because its extensions are not built. Try: gem pristine curb --version 0.9.3
Ignoring executable-hooks-1.3.2 because its extensions are not built. Try: gem pristine executable-hooks --version 1.3.2
Ignoring ffi-1.9.10 because its extensions are not built. Try: gem pristine ffi --version 1.9.10
Ignoring gem-wrappers-1.2.7 because its extensions are not built. Try: gem pristine gem-wrappers --version 1.2.7
Ignoring json-1.8.2 because its extensions are not built. Try: gem pristine json --version 1.8.2
Ignoring thin-1.6.1 because its extensions are not built. Try: gem pristine thin --version 1.6.1
Configuration file: /home/jtebert/OwnCloud/Projects/Programming/python/AMS/mockup/_config.yml
Source: /home/jtebert/OwnCloud/Projects/Programming/python/AMS/mockup
Destination: /home/jtebert/OwnCloud/Projects/Programming/python/AMS/mockup/_site
Incremental build: disabled. Enable with --incremental
Generating...
done in 1.404 seconds.
/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require': incompatible library version - /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/ffi-1.9.10/lib/ffi_c.so (LoadError)
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/ffi-1.9.10/lib/ffi.rb:6:in `rescue in <top (required)>'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/ffi-1.9.10/lib/ffi.rb:3:in `<top (required)>'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/rb-inotify-0.9.7/lib/rb-inotify/native.rb:1:in `<top (required)>'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/rb-inotify-0.9.7/lib/rb-inotify.rb:1:in `<top (required)>'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/adapter/linux.rb:30:in `_configure'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/adapter/base.rb:45:in `block in configure'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/adapter/base.rb:40:in `each'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/adapter/base.rb:40:in `configure'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/adapter/base.rb:63:in `start'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/backend.rb:26:in `start'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/listener.rb:67:in `block in <class:Listener>'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/fsm.rb:120:in `instance_eval'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/fsm.rb:120:in `call'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/fsm.rb:91:in `transition_with_callbacks!'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/fsm.rb:57:in `transition'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/listener.rb:90:in `start'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/jekyll-watch-1.3.1/lib/jekyll/watcher.rb:12:in `watch'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/jekyll-3.1.3/lib/jekyll/commands/build.rb:72:in `watch'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/jekyll-3.1.3/lib/jekyll/commands/build.rb:39:in `process'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/jekyll-3.1.3/lib/jekyll/commands/serve.rb:34:in `block (2 levels) in init_with_program'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `block in execute'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `each'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `execute'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/mercenary-0.3.5/lib/mercenary/program.rb:42:in `go'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/mercenary-0.3.5/lib/mercenary.rb:19:in `program'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/jekyll-3.1.3/bin/jekyll:13:in `<top (required)>'
from /usr/local/bin/jekyll:23:in `load'
from /usr/local/bin/jekyll:23:in `<main>'
尝试启动 Jekyll 项目时，我确实必须创建一个 link 个 Ruby 版本，因为它正在寻找 'Ruby2.1'，但我不确定这是否在当前问题中发挥作用：ln -s /usr/bin/ruby '/usr/bin/ruby2.1'.
根据我的包管理器，我已经安装了 Ruby 2.3.0。但是根据 which ruby，我使用的是从 rvm 获得的 2.0.0：/home/xxxxxxx/.rvm/rubies/ruby-2.0.0-p643/bin/ruby。正如我之前提到的，Jekyll 似乎需要 v2.1。我猜这些冲突的版本不知何故导致了这个问题，但我不知道如何解决它。
我的问题似乎是 rvm（我不确定我最终是如何使用它的）。解决方案是使用 rvm implode 删除 rvm，然后使用 gem install jekyll 重新安装 jekyll。警告和错误都消失了，服务正常。
在我的例子中，我必须使用 gem:
安装 ffi 库
gem install ffi
这个错误可能是由于系统中安装了旧版本的库引起的。 gem 然后为您的项目安装正确的版本。
当尝试 运行 jekyll serve 时，它似乎构建正确（尽管有我无法解决的警告），但随后无法提供服务。 jekyll build 完成，但生成的文件缺少已编译的 CSS。
来自jekyll serve的输出：
Ignoring ffi-1.9.10 because its extensions are not built. Try: gem pristine ffi --version 1.9.10
Ignoring curb-0.9.3 because its extensions are not built. Try: gem pristine curb --version 0.9.3
Ignoring executable-hooks-1.3.2 because its extensions are not built. Try: gem pristine executable-hooks --version 1.3.2
Ignoring ffi-1.9.10 because its extensions are not built. Try: gem pristine ffi --version 1.9.10
Ignoring gem-wrappers-1.2.7 because its extensions are not built. Try: gem pristine gem-wrappers --version 1.2.7
Ignoring json-1.8.2 because its extensions are not built. Try: gem pristine json --version 1.8.2
Ignoring thin-1.6.1 because its extensions are not built. Try: gem pristine thin --version 1.6.1
Configuration file: /home/jtebert/OwnCloud/Projects/Programming/python/AMS/mockup/_config.yml
Source: /home/jtebert/OwnCloud/Projects/Programming/python/AMS/mockup
Destination: /home/jtebert/OwnCloud/Projects/Programming/python/AMS/mockup/_site
Incremental build: disabled. Enable with --incremental
Generating...
done in 1.404 seconds.
/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require': incompatible library version - /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/ffi-1.9.10/lib/ffi_c.so (LoadError)
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/ffi-1.9.10/lib/ffi.rb:6:in `rescue in <top (required)>'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/ffi-1.9.10/lib/ffi.rb:3:in `<top (required)>'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:120:in `require'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/rb-inotify-0.9.7/lib/rb-inotify/native.rb:1:in `<top (required)>'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/rb-inotify-0.9.7/lib/rb-inotify.rb:1:in `<top (required)>'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/adapter/linux.rb:30:in `_configure'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/adapter/base.rb:45:in `block in configure'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/adapter/base.rb:40:in `each'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/adapter/base.rb:40:in `configure'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/adapter/base.rb:63:in `start'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/backend.rb:26:in `start'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/listener.rb:67:in `block in <class:Listener>'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/fsm.rb:120:in `instance_eval'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/fsm.rb:120:in `call'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/fsm.rb:91:in `transition_with_callbacks!'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/fsm.rb:57:in `transition'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/listen-3.0.6/lib/listen/listener.rb:90:in `start'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/jekyll-watch-1.3.1/lib/jekyll/watcher.rb:12:in `watch'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/jekyll-3.1.3/lib/jekyll/commands/build.rb:72:in `watch'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/jekyll-3.1.3/lib/jekyll/commands/build.rb:39:in `process'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/jekyll-3.1.3/lib/jekyll/commands/serve.rb:34:in `block (2 levels) in init_with_program'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `block in execute'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `each'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `execute'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/mercenary-0.3.5/lib/mercenary/program.rb:42:in `go'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/mercenary-0.3.5/lib/mercenary.rb:19:in `program'
from /home/jtebert/.rvm/gems/ruby-2.0.0-p643/gems/jekyll-3.1.3/bin/jekyll:13:in `<top (required)>'
from /usr/local/bin/jekyll:23:in `load'
from /usr/local/bin/jekyll:23:in `<main>'
尝试启动 Jekyll 项目时，我确实必须创建一个 link 个 Ruby 版本，因为它正在寻找 'Ruby2.1'，但我不确定这是否在当前问题中发挥作用：ln -s /usr/bin/ruby '/usr/bin/ruby2.1'.
根据我的包管理器，我已经安装了 Ruby 2.3.0。但是根据 which ruby，我使用的是从 rvm 获得的 2.0.0：/home/xxxxxxx/.rvm/rubies/ruby-2.0.0-p643/bin/ruby。正如我之前提到的，Jekyll 似乎需要 v2.1。我猜这些冲突的版本不知何故导致了这个问题，但我不知道如何解决它。
我的问题似乎是 rvm（我不确定我最终是如何使用它的）。解决方案是使用 rvm implode 删除 rvm，然后使用 gem install jekyll 重新安装 jekyll。警告和错误都消失了，服务正常。
在我的例子中，我必须使用 gem:
ffi 库
gem install ffi
这个错误可能是由于系统中安装了旧版本的库引起的。 gem 然后为您的项目安装正确的版本。