bundle 时出错，出错信息是：
An error occurred while installing nokogiri (1.8.2), and Bundler cannot
continue.
Make sure that `gem install nokogiri -v '1.8.2' --source
'https://rubygems.org/'` succeeds before bundling.
求解。 Rails 版本：Rails 4.2.6 Ruby 版本：ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-darwin15]
谢谢。
可能是找不到 libxml2 或者 libxslt
你看看 ls /usr/include/libxslt 有没有，如果没有那就
brew install libxml2 libxslt
gem install nokogiri -v '1.8.2' -- --with-xslt-dir=/usr/local/opt/libxslt --with-xml2-dir=/usr/local/opt/libxml2
然后 bundle
我自己录制了 mac 下 rails 开发环境的配置视频。你可以参考。https://itfun.tv/courses/25 直接 QQ 登录看，不需要注册了。
可以看看官方文档，我比较喜欢用 brew 装 libxml2，因为编译时间快。
brew install libxml2
# If installing directly
gem install nokogiri -- --use-system-libraries \
--with-xml2-include=$(brew --prefix libxml2)/include/libxml2
# If using Bundle
bundle config build.nokogiri --use-system-libraries \
--with-xml2-include=$(brew --prefix libxml2)/include/libxml2
bundle install
另外如果你用 Rails 4.2 的话，应该尽早升级到 4.2.10 和 Ruby 2.3.7，否则会漏掉不少安全补丁。
对
luikore
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luikore
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chihwoo:~ goki$ brew install libxml2 libxslt
Error: libxml2 2.9.4 is already installed
To upgrade to 2.9.7, run `brew upgrade libxml2`
Error: libxslt 1.1.28_1 is already installed
To upgrade to 1.1.32, run `brew upgrade libxslt`
谢谢，貌似没有问题。
对
IChou
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IChou
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谢谢回复。 gem_make.out 里的内容如下。 如何看哪里爆了呢？
current directory: /Users/goki/tong_app/vendor/bundle/gems/nokogiri-1.8.2/ext/nokogiri
/Users/goki/.rbenv/versions/2.3.0/bin/ruby -r ./siteconf20180609-10739-7kuq0s.rb extconf.rb --use-system-libraries
checking if the C compiler accepts ... yes
checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
Building nokogiri using system libraries.
checking for xmlParseDoc() in libxml/parser.h... yes
checking for xsltParseStylesheetDoc() in libxslt/xslt.h... yes
checking for exsltFuncRegister() in libexslt/exslt.h... yes
checking for xmlHasFeature()... yes
checking for xmlFirstElementChild()... yes
checking for xmlRelaxNGSetParserStructuredErrors()... yes
checking for xmlRelaxNGSetParserStructuredErrors()... yes
checking for xmlRelaxNGSetValidStructuredErrors()... yes
checking for xmlSchemaSetValidStructuredErrors()... yes
checking for xmlSchemaSetParserStructuredErrors()... yes
creating Makefile
current directory: /Users/goki/tong_app/vendor/bundle/gems/nokogiri-1.8.2/ext/nokogiri
make "DESTDIR=" clean
current directory: /Users/goki/tong_app/vendor/bundle/gems/nokogiri-1.8.2/ext/nokogiri
make "DESTDIR="
compiling html_document.c
couldn't understand kern.osversion `16.7.0'
In file included from /Users/goki/.rbenv/versions/2.3.0/include/ruby-2.3.0/ruby.h:33,
from ./nokogiri.h:33,
from ./html_document.h:4,
from html_document.c:1:
/Users/goki/.rbenv/versions/2.3.0/include/ruby-2.3.0/ruby/ruby.h:926: error: wrong number of arguments specified for ‘deprecated’ attribute
/Users/goki/.rbenv/versions/2.3.0/include/ruby-2.3.0/ruby/ruby.h:1419: error: wrong number of arguments specified for ‘deprecated’ attribute
/Users/goki/.rbenv/versions/2.3.0/include/ruby-2.3.0/ruby/ruby.h:1428: error: wrong number of arguments specified for ‘deprecated’ attribute
make: *** [html_document.o] Error 1
make failed, exit code 2
IChou
#8
2018年06月09日
对
chihwoo
回复
chihwoo
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这个报错，有点少见了，在编译阶段触发的，感觉像是 gcc 的问题呀
在你开始装环境之前 xcode-select --install 执行了么？
IChou
#9
2018年06月09日
这个问题我也没遇到过，所以怎么处理也不是很确定
https://github.com/sparklemotion/nokogiri/issues/1111 这个里面稍微有提到一些
建议尝试：
xcode-select --install
rbenv uninstall 2.3.0
rbenv install 2.3.0
gem install nokogiri -v '1.8.2'
看看能不能解决
chihwoo
#12
2018年06月10日
对
IChou
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IChou
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Error: Your Xcode (7.3.1) is too outdated.
Please update to Xcode 9.4 (or delete it).
Xcode can be updated from the App Store.
好像提示我 Xcode 的版本低。。。我正在升级试试看。
luikore
#15
2018年06月10日
对
IChou
回复
IChou
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我确定啊，couldn't understand kern.osversion 就是 gcc 出来的：
https://github.com/gcc-mirror/gcc/blob/master/gcc/config/darwin-driver.c#L80
根本原因可能是看了太古老的教程
luikore
#19
2018年06月11日
对
chihwoo
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chihwoo
回复
brew list 看看有没有 gcc 的包，如果有就 brew remove 包名.
如果有 macports, 也用类似的方式删掉 gcc.
然后 gcc -v 看一下，如果显示 Apple LLVM version ... (clang-...) 那就好了 (这是 LLVM 的假 gcc)
如果还有而且你不知道怎么删... 建议还是用 docker 搞吧 https://hub.docker.com/_/ruby/
IChou
#20
2018年06月12日
对
chihwoo
回复
chihwoo
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《Rails 5 敏捷开发》/ 《Agile Web Development with Rails 5》
https://about.ac/books/agile-rails5/ 国内版本的介绍，论坛里也有不少介绍
或者
《Ruby on Rails 教程（原书第 4 版）》
https://railstutorial-china.org 这本更基础点，而且有电子书
chihwoo
#25
2018年06月17日
谢谢各位前辈的指导，我都尝试了但是还是没能解决。。。555 我又重新创建了一个 app，可是进不去该目录，代码如下：
chihwoo:// goki$ rails new tweet_app
create
/Users/goki/.rbenv/versions/2.3.0/lib/ruby/2.3.0/fileutils.rb:253:in `mkdir': Permission denied @ dir_s_mkdir - /tweet_app (Errno::EACCES)
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/2.3.0/fileutils.rb:253:in `fu_mkdir'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/2.3.0/fileutils.rb:227:in `block (2 levels) in mkdir_p'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/2.3.0/fileutils.rb:225:in `reverse_each'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/2.3.0/fileutils.rb:225:in `block in mkdir_p'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/2.3.0/fileutils.rb:211:in `each'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/2.3.0/fileutils.rb:211:in `mkdir_p'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/actions/empty_directory.rb:50:in `block in invoke!'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/actions/empty_directory.rb:116:in `invoke_with_conflict_check'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/actions/empty_directory.rb:49:in `invoke!'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/actions.rb:94:in `action'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/actions/empty_directory.rb:14:in `empty_directory'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/generators/app_base.rb:138:in `create_root'
from (eval):1:in `create_root'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `block in invoke_all'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `each'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `map'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `invoke_all'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/group.rb:232:in `dispatch'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/thor-0.19.1/lib/thor/base.rb:440:in `start'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/commands/application.rb:17:in `<top (required)>'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:59:in `require'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:59:in `require'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/lib/rails/cli.rb:14:in `<top (required)>'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:59:in `require'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:59:in `require'
from /Users/goki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/railties-4.2.6/bin/rails:9:in `<top (required)>'
from /Users/goki/.rbenv/versions/2.3.0/bin/rails:23:in `load'
from /Users/goki/.rbenv/versions/2.3.0/bin/rails:23:in `<main>'
chihwoo:// goki$ cd tweet_app
-bash: cd: tweet_app: No such file or directory
chihwoo:// goki$
请问是什么原因呢？