Hi,
in two my server with Ubuntu I'm not able to install nokogiri.
When I run the installation command appears this message:
root@server1:/usr/lib# gem install nokogiri
Building native extensions.  This could take a while...
ERROR:  Error installing nokogiri:
  ERROR: Failed to build gem native extension.

/usr/bin/ruby1.8 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=/usr/bin/ruby1.8
  --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 /var/lib/gems/1.8/gems/nokogiri-1.4.4
for inspection.
Results logged to
/var/lib/gems/1.8/gems/nokogiri-1.4.4/ext/nokogiri/gem_make.out

Somebody can help me please??
I'm searching on the net for some information but for now nothing to
do...
Thansk in advance.
;-)

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