gem install error libxslt is missing

When installing ruby gem, i get following error

[root@video1 cms]# gem install sanitize -v 1.2.1 --no-ri --no-rdoc
Building native extensions.  This could take a while...
ERROR:  Error installing sanitize:
	ERROR: Failed to build gem native extension.

/usr/local/rvm/rubies/ruby-1.8.7-head/bin/ruby extconf.rb
checking for libxml/parser.h... yes
checking for libxslt/xslt.h... no
-----
libxslt 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/local/rvm/rubies/ruby-1.8.7-head/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


Gem files will remain installed in /usr/local/rvm/gems/ruby-1.8.7-head/gems/nokogiri-1.4.7 for inspection.
Results logged to /usr/local/rvm/gems/ruby-1.8.7-head/gems/nokogiri-1.4.7/ext/nokogiri/gem_make.out
[root@video1 cms]# 

Soluton

Install missing libxslt devel package.

On CentOS installed.

yum install -y libxslt-devel

For error “libxml2 is missing.”, install

yum install -y libxml2-devel