RVM 1.9.1＆Nokogiri

Question

RVM Ruby 1.9.1の下にNokogiri Gemの設置に問題がある。

gem install nokogiri

私は取得しています...

/usr/include/libxml2... no
libxml2 is missing.  try 'port install libxml2' or 'yum install libxml2-devel'
*** extconf.rb failed ***

しかし、私はチェックしました：

sudo apt-get install libxml2

そして、私は得ました：

Reading state information... Done
libxml2 is already the newest version.

これはおそらく根源ですか？ RVMはユーザースペースですべてを実行します。

Answer 1

You might want to confirm that the version of libxml installed by apt is current. Nokogiri likes nice fresh versions of libxml, so I built my libxml install from source.

nokogiri -v will tell you what you're using.

Answer 2

A simpler solution:

sudo apt-get install libxslt-dev libxml2-dev

Answer 3

I ran into a similar problem using homebrew on Mac.

Here's the code that does the trick, a small extension of the Nokogiri installation instructions for homebrew. Basically, you need to include a directive to tell nokogiri to use the homebrew libxml dirs. Make sure you point to the correct version of libxml2 installed by homebrew, which for me was 2.7.8:

brew install libxml2

brew link libxml2 #this may be enough but didn't work for me with rvm

#explicitly tell nokogiri to use you homebrew libxml2 rather than system
gem install nokogiri -- --with-xml2-include=/usr/local/Cellar/libxml2/2.7.8/include/libxml2 --with-xml2-lib=/usr/local/Cellar/libxml2/2.7.8/lib --with-xslt-dir=/usr/local/Cellar/libxslt/1.1.26