安装 nokogiri 时有关问题处理
# bundle install
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Installing nokogiri (1.4.4) with native extensions /opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/site_ruby/1.8/rubygems/installer.rb:483:in `build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)
/opt/ruby-enterprise-1.8.7-2010.02/bin/ruby extconf.rb
checking for libxml/parser.h... no
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libxml2 is missing. please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.
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原因：缺少libxml2-devel这个包
# rpm -qa |grep libxml
libxml2-2.6.26-2.1.2
libxml2-python-2.6.26-2.1.2
//原因是没有安装libxml2-devel这个包，
解决：
# rpm -ivh /media/CDROM/Server/libxml2-devel-2.6.26-2.1.2.i386.rpm
warning: libxml2-devel-2.6.26-2.1.2.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:libxml2-devel ########################################### [100%]
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Installing nokogiri (1.4.4) with native extensions /opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/site_ruby/1.8/rubygems/installer.rb:483:in `build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)
/opt/ruby-enterprise-1.8.7-2010.02/bin/ruby extconf.rb
checking for libxml/parser.h... yes
checking for libxslt/xslt.h... no
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libxslt is missing. please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.
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原因：缺少libxslt-devel这个包
# rpm -qa |grep libxslt
libxslt-1.1.17-2
//原因是没有安装libxml2-devel这个包，
解决：
# rpm -ivh libxslt-devel-1.1.17-2.i386.rpm
warning: libxslt-devel-1.1.17-2.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
error: Failed dependencies:
libgcrypt-devel is needed by libxslt-devel-1.1.17-2.i386
# rpm -ivh libgpg-error-devel-1.4-2.i386.rpm libgcrypt-devel-1.2.3-1.i386.rpm
warning: libgpg-error-devel-1.4-2.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:libgpg-error-devel ########################################### [ 50%]
2:libgcrypt-devel ########################################### [100%]
# rpm -ivh libxslt-devel-1.1.17-2.i386.rpm
warning: libxslt-devel-1.1.17-2.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:libxslt-devel ########################################### [100%]
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