问题描述
这是在服务器上运行捆绑安装供应商/ gems 的错误：
Installing nokogiri (1.5.0) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/home/dtt/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb
checking for libxml/parser.h... no
-----
libxml2 is missing. please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.
-----
*** 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=/home/dtt/.rvm/rubies/ruby-1.9.2-p290/bin/ruby
--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-iconv-dir
--without-iconv-dir
--with-iconv-include
--without-iconv-include=${iconv-dir}/include
--with-iconv-lib
--without-iconv-lib=${iconv-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-xslt-dir
--without-xslt-dir
--with-xslt-include
--without-xslt-include=${xslt-dir}/include
--with-xslt-lib
--without-xslt-lib=${xslt-dir}/lib
Gem files will remain installed in /vol/www/emclab/releases/20111104001151/vendor/gems/ruby/1.9.1/gems/nokogiri-1.5.0 for inspection.
Results logged to /vol/www/emclab/releases/20111104001151/vendor/gems/ruby/1.9.1/gems/nokogiri-1.5.0/ext/nokogiri/gem_make.out
An error occured while installing nokogiri (1.5.0), and Bundler cannot continue.
Make sure that `gem install nokogiri -v '1.5.0'` succeeds before bundling.
您可以跳过此部分。该错误消息几乎可以自我解释，但是该网站还需要一些其他单词来解释该代码。
有什么想法吗？
最佳方法
您需要在计算机上安装所有必需的库。当您安装RVM时，它应该已经为您列出了。在当前版本的rvm上，可以运行rvm requirements以查看确切的列表。现在，该列表是：
sudo apt-get install build-essential openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-0 libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev ncurses-dev automake libtool bison subversion
次佳方法
您缺少某些软件包。尝试运行此命令(仅限Linux)：
$ sudo apt-get install libxslt-dev libxml2-dev
第三种方法
看起来像是gem依赖错误。
您需要运行bundle update命令。它将解决依赖关系：
bundle update
第四种方法
您需要安装libxml2。
在Mac OS上，使用自制软件将是：
brew install libxml2
参见http://nokogiri.org/tutorials/installing_nokogiri.html。
第五种方法
只是这样做：
sudo apt-get install libxslt-dev libxml2-dev libxml2
然后在终端(linux)/cmd(windows)中输入以下内容：
export NOKOGIRI_USE_SYSTEM_LIBRARIES=true