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我刚开始去学习Rails和我在努力走出块....宝石文件安装罚款，但不能包编译安装
$ rails new sample_app
$ cd sample_app
$ bundle install
Fetching gem metadata from https://rubygems.org/...........
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Using rake 10.5.0
Using i18n 0.7.0
Using json 1.8.3
Using minitest 5.8.4
Using thread_safe 0.3.5
Using builder 3.2.2
Using erubis 2.7.0
Using mini_portile2 2.0.0
Using rack 1.6.4
Using mime-types 2.99
Using arel 6.0.3
Using debug_inspector 0.0.2
Using byebug 8.2.2
Using coffee-script-source 1.10.0
Using execjs 2.6.0
Using thor 0.19.1
Using concurrent-ruby 1.0.0
Using multi_json 1.11.2
Using bundler 1.11.2
Using sass 3.4.21
Using tilt 2.0.2
Using spring 1.6.3
Using sqlite3 1.3.11
Using rdoc 4.2.2
Using tzinfo 1.2.2
Installing nokogiri 1.6.7.2 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory: /Users/pschloss/Desktop/rails/sample_app/vendor/bundle/ruby/2.0.0/gems/nokogiri-1.6.7.2/ext/nokogiri
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby -r ./siteconf20160218-90999-1e1suiq.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... no
checking for xmlParseDoc() in -lxml2... no
checking for xmlParseDoc() in -llibxml2... no
-----
libxml2 is missing. Please locate mkmf.log to investigate how it is failing.
-----
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby
--help
--clean
--use-system-libraries
--with-zlib-dir
--without-zlib-dir
--with-zlib-include
--without-zlib-include=${zlib-dir}/include
--with-zlib-lib
--without-zlib-lib=${zlib-dir}/lib
--with-xml2-dir
--without-xml2-dir
--with-xml2-include
--without-xml2-include=${xml2-dir}/include
--with-xml2-lib
--without-xml2-lib=${xml2-dir}/lib
--with-libxml-2.0-config
--without-libxml-2.0-config
--with-pkg-config
--without-pkg-config
--with-xslt-dir
--without-xslt-dir
--with-xslt-include
--without-xslt-include=${xslt-dir}/include
--with-xslt-lib
--without-xslt-lib=${xslt-dir}/lib
--with-libxslt-config
--without-libxslt-config
--with-exslt-dir
--without-exslt-dir
--with-exslt-include
--without-exslt-include=${exslt-dir}/include
--with-exslt-lib
--without-exslt-lib=${exslt-dir}/lib
--with-libexslt-config
--without-libexslt-config
--with-xml2lib
--without-xml2lib
--with-libxml2lib
--without-libxml2lib
To see why this extension failed to compile, please check the mkmf.log which can be found here:
/Users/pschloss/Desktop/rails/sample_app/vendor/bundle/ruby/2.0.0/extensions/universal-darwin-15/2.0.0/nokogiri-1.6.7.2/mkmf.log
extconf failed, exit code 1
Gem files will remain installed in /Users/pschloss/Desktop/rails/sample_app/vendor/bundle/ruby/2.0.0/gems/nokogiri-1.6.7.2 for inspection.
Results logged to /Users/pschloss/Desktop/rails/sample_app/vendor/bundle/ruby/2.0.0/extensions/universal-darwin-15/2.0.0/nokogiri-1.6.7.2/gem_make.out
Using rack-test 0.6.3
Using mail 2.6.3
Using binding_of_caller 0.7.2
Using coffee-script 2.4.1
Using uglifier 2.7.2
Using sprockets 3.5.2
Using sdoc 0.4.1
Using activesupport 4.2.5.1
An error occurred while installing nokogiri (1.6.7.2), and Bundler cannot continue.
Make sure that `gem install nokogiri -v '1.6.7.2'` succeeds before bundling.
于是我终于得到安装nokogiri ...
$ gem install nokogiri -- --use-system-libraries
Building native extensions with: '--use-system-libraries'
This could take a while...
Successfully installed nokogiri-1.6.7.2
Parsing documentation for nokogiri-1.6.7.2
Done installing documentation for nokogiri after 1 seconds
1 gem installed
然后我重做bundle install，我得到了同样的错误，我以前还。
另外，如果我这样做：
$ bundle config build.nokogiri --use-system-libraries & bundle install
我得到了同样的错误。
下面是一些规格：对我做错了什么在这里
$ rails --version
Rails 4.2.5.1
$ ruby --version
ruby 2.2.4p230 (2015-12-16 revision 53155) [x86_64-darwin15]
$ sw_vers
ProductName: Mac OS X
ProductVersion: 10.11.1
BuildVersion: 15B42
任何想法？
谢谢，但我得到了同样的错误。与我使用'bundle config build.nokogiri --use-system-libraries＆bundle install'所做的事情不一样吗？ –
哦拍，我错过了！抱歉。你试过'--with-xml2-include =/wherever/brew/install/it'标志吗？否则请尝试此[线索建议]（http：// stackoverflow。com/questions/23668684/failed-to-build-gem-native-extension-when-i-run-bundle-install） – wpp
感谢您对该线程的链接，原来，http://stackoverflow.com/a/ 25068003/3914395有解决方案：'brew install libxml2 bundle config build.nokogiri“--use-system-libraries --with-xml2-include =/usr/local/opt/libxml2/include/libxml2” bundle install' - 我没有同时使用'--use-system-libraries'和'--with-xml2-include'。 –