extconf.rb: “fails to build native gem extension”

Question

I have a VPS running CentOS, and I have ths message when I try to install Rails , Passenger or anything else.

[athos@athoscastro bin]$ gem install rails
Fetching: nokogiri-1.6.6.2.gem (100%)
Building native extensions.  This could take a while...
ERROR:  Error installing rails:
    ERROR: Failed to build gem native extension.

/usr/bin/ruby extconf.rb

Gem files will remain installed in /home/athos/.gem/ruby/gems/nokogiri-1.6.6.2 for inspection.
Results logged to /home/athos/.gem/ruby/gems/nokogiri-1.6.6.2/ext/nokogiri/gem_make.out

I have all the dependencies installed (everything related to this on Google says about dependecy) but the error still persists.

Answer 1

Did you install dev packages?

sudo yum install -y gcc ruby-devel zlib-devel

and

yum install libxml2-devel libxslt libxslt-devel