所以，我正在尝试安装libxslt-ruby（http://rubydoc.info/gems/libxslt-ruby/1.0.8/frames） 所以我可以使用word_parsing gem（http://rubygems.org/gems/word_parsing），但我收到的错误是说我没有一些必需的lib文件。我该如何解决这个问题？他们已经在我的系统上（Mac Lion）？
我发现libxslt-ruby只需要以下内容：
libm (math routines: very standard)
libz (zlib)
libiconv
libxml2
libxslt
并且，我在/ usr / bin目录中有所有这些（作为dylib的）
这是错误：
sudo gem install libxslt-ruby-1.0.8.gem
Building native extensions. This could take a while...
ERROR: Error installing libxslt-ruby-1.0.8.gem:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
checking for ruby/io.h... no
checking for inflate() in -lz... yes
checking for iconv_open() in -liconv... yes
checking for xmlXPtrNewRange() in -lxml2... yes
checking for libxml/xmlversion.h... no
checking for libxml/xmlversion.h in /opt/include/libxml2,/usr/local/include/libxml2,/usr/include/libxml2... yes
checking for xsltApplyStylesheet() in -lxslt... yes
checking for xslt.h... no
checking for xslt.h in /opt/include/libxslt,/usr/local/include/libxslt,/usr/include/libxslt... yes
checking for exsltRegisterAll() in -lexslt... yes
checking for exslt.h... no
checking for exslt.h in /opt/include/libexslt,/usr/local/include/libexslt,/usr/include/libexslt... yes
*** 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/1.8/usr/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
--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-zlib
--without-zlib
--with-iconvlib
--without-iconvlib
--with-xml2lib
--without-xml2lib
--with-xsltlib
--without-xsltlib
--with-exsltlib
--without-exsltlib
extconf.rb:114: undefined method `find_by_name' for Gem::Specification:Class (NoMethodError)