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POWARNING: Nokogiri was built against LibXML version 2.7.7, but has dynamically loaded 2.6.16
 

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  1. POWARNING: Nokogiri was built against LibXML version 2.7.7, but has dynamically loaded 2.6.16
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    <p>I can’t work out why I’m getting this error from Nokogiri when I start up Rails. From the little I know, it seems like something else is causing an older version of libxml2 to be loaded, which Nokogiri then ends up using, rather than the version it was compiled against.</p> <p>What do I need to do to get this working without the warning (and with the right libxml2)?</p> <p>I’m running this on a Macbook with OS X 10.5.8:</p> <pre class="lang-none prettyprint-override"><code>$ rake db:create (in /Users/gareth/Sites/Rails3/ngtest) WARNING: Nokogiri was built against LibXML version 2.7.7, but has dynamically loaded 2.6.16 HI. You're using libxml2 version 2.6.16 which is over 4 years old and has plenty of bugs. We suggest that for maximum HTML/XML parsing pleasure, you upgrade your version of libxml2 and re-install nokogiri. If you like using libxml2 version 2.6.16, but don't like this warning, please define the constant I_KNOW_I_AM_USING_AN_OLD_AND_BUGGY_VERSION_OF_LIBXML2 before requring nokogiri. ngtest_test already exists ngtest_development already exists $ DYLD_PRINT_LIBRARIES=1 rake db:create dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/bin/ruby dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/libruby.1.9.1.dylib dyld: loaded: /usr/lib/libSystem.B.dylib dyld: loaded: /usr/lib/libobjc.A.dylib dyld: loaded: /usr/lib/libgcc_s.1.dylib dyld: loaded: /usr/lib/system/libmathCommon.A.dylib dyld: loaded: /usr/lib/libauto.dylib dyld: loaded: /usr/lib/libstdc++.6.dylib dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/enc/encdb.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/enc/trans/transdb.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/etc.bundle (in /Users/gareth/Sites/Rails3/ngtest) dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/stringio.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/syck.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/digest/sha1.bundle dyld: loaded: /usr/lib/libcrypto.0.9.7.dylib dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/digest.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/enc/iso_8859_1.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/zlib.bundle dyld: loaded: /usr/lib/libz.1.dylib dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/strscan.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/bigdecimal.bundle dyld: loaded: /Users/gareth/.rvm/gems/ruby-1.9.2-p136/gems/mysql-2.8.1/lib/mysql_api.bundle dyld: loaded: /usr/local/Cellar/mysql/5.1.54/lib/mysql/libmysqlclient.16.dylib dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/openssl.bundle dyld: loaded: /usr/lib/libssl.0.9.7.dylib dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/fcntl.bundle dyld: loaded: /Users/gareth/.rvm/gems/ruby-1.9.2-p136/gems/eventmachine-0.12.10/lib/rubyeventmachine.bundle dyld: loaded: /Users/gareth/.rvm/gems/ruby-1.9.2-p136/gems/thin-1.2.7/lib/thin_parser.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/digest/md5.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/iconv.bundle dyld: loaded: /usr/lib/libiconv.2.dylib dyld: loaded: /Users/gareth/.rvm/gems/ruby-1.9.2-p136/gems/json-1.4.6/ext/json/ext/json/ext/parser.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/enc/utf_16be.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/enc/utf_16le.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/enc/utf_32be.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/enc/utf_32le.bundle dyld: loaded: /Users/gareth/.rvm/gems/ruby-1.9.2-p136/gems/json-1.4.6/ext/json/ext/json/ext/generator.bundle dyld: loaded: /Users/gareth/.rvm/gems/ruby-1.9.2-p136/gems/rpeg-markdown-1.4.6/lib/peg_markdown.bundle dyld: loaded: /usr/local/Cellar/glib/2.24.2/lib/libglib-2.0.0.dylib dyld: loaded: /usr/local/Cellar/gettext/0.17/lib/libintl.8.dylib dyld: loaded: /System/Library/Frameworks/Carbon.framework/Versions/A/Carbon dyld: loaded: /System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices dyld: loaded: /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation dyld: loaded: /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/CarbonSound.framework/Versions/A/CarbonSound dyld: loaded: /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/CommonPanels.framework/Versions/A/CommonPanels dyld: loaded: /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Help.framework/Versions/A/Help dyld: loaded: /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox dyld: loaded: /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HTMLRendering.framework/Versions/A/HTMLRendering dyld: loaded: /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/ImageCapture.framework/Versions/A/ImageCapture dyld: loaded: /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Ink.framework/Versions/A/Ink dyld: loaded: /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/NavigationServices.framework/Versions/A/NavigationServices dyld: loaded: /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/OpenScripting.framework/Versions/A/OpenScripting dyld: loaded: /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Print.framework/Versions/A/Print dyld: loaded: /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/SecurityHI.framework/Versions/A/SecurityHI dyld: loaded: /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/SpeechRecognition.framework/Versions/A/SpeechRecognition dyld: loaded: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices dyld: loaded: /System/Library/Frameworks/CoreAudio.framework/Versions/A/CoreAudio dyld: loaded: /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/CarbonCore dyld: loaded: 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/System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL dyld: loaded: /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGLImage.dylib dyld: loaded: /usr/lib/libffi.dylib dyld: loaded: /System/Library/Frameworks/CoreVideo.framework/Versions/A/CoreVideo dyld: loaded: /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGLU.dylib dyld: loaded: /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib dyld: loaded: /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGLProgrammability.dylib dyld: loaded: /System/Library/PrivateFrameworks/InstallServer.framework/Versions/A/InstallServer dyld: loaded: /Users/gareth/.rvm/gems/ruby-1.9.2-p136/gems/nokogiri-1.4.4/lib/nokogiri/nokogiri.bundle dyld: loaded: /usr/local/Cellar/libxslt/1.1.26/lib/libexslt.0.dylib dyld: loaded: /usr/local/Cellar/libxslt/1.1.26/lib/libxslt.1.dylib dyld: loaded: /usr/local/Cellar/libxml2/2.7.7/lib/libxml2.2.dylib WARNING: Nokogiri was built against LibXML version 2.7.7, but has dynamically loaded 2.6.16 HI. You're using libxml2 version 2.6.16 which is over 4 years old and has plenty of bugs. We suggest that for maximum HTML/XML parsing pleasure, you upgrade your version of libxml2 and re-install nokogiri. If you like using libxml2 version 2.6.16, but don't like this warning, please define the constant I_KNOW_I_AM_USING_AN_OLD_AND_BUGGY_VERSION_OF_LIBXML2 before requring nokogiri. dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/racc/cparse.bundle dyld: loaded: /Users/gareth/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/i386-darwin9.8.0/socket.bundle ngtest_test already exists ngtest_development already exists $ nokogiri -v --- warnings: [] nokogiri: 1.4.4 ruby: version: 1.9.2 platform: i386-darwin9.8.0 engine: ruby libxml: binding: extension compiled: 2.7.7 loaded: 2.7.7 </code></pre>
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    1. COthat app wins for coolest constant name ever :) `I_KNOW_I_AM_USING_AN_OLD_AND_BUGGY_VERSION_OF_LIBXML2`
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    2. CO@BenGC nokogiri and its developers are full of win.
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