在安装Opengraph Gem时出错

Question

I get the following error when I try to install the opengraph gem:

gem install opengraphBuilding native extensions.  This could take a while...
ERROR:  Error installing opengraph:
    ERROR: Failed to build gem native extension.

details.  You may need configuration options.

Provided configuration options:
    --with-opt-dir
    --without-opt-dir
    --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 /home/faraz/.rvm/gems/ruby-1.9.3-p448/gems/nokogiri-1.4.7 for inspection.
Results logged to /home/faraz/.rvm/gems/ruby-1.9.3-p448/gems/nokogiri-1.4.7/ext/nokogiri/gem_make.out

Here is my setup:

• OS: Linux Mint 64bit.
• Ruby: 1.9.3
• Rails 3.2.3
• Rubygems: 2.1.0

Please help.

EDIT

As asked in the answer below, here are the logs from /home/faraz/.rvm/gems/ruby-1.9.3-p448/gems/nokogiri-1.4.7/ext/nokogiri/gem_make.out :

....../bin/ruby extconf.rb extconf.rb:10: Use RbConfig instead of obsolete and deprecated Config.
checking for libxml/parser.h... yes
checking for libxslt/xslt.h... no
 ----- libxslt is missing

There are some other lines like this in the log file.

Answer 1

From the above log, it should be clear that opengraph installation failed because nokigiri installation failed. You should next open /home/faraz/.rvm/gems/ruby-1.9.3-p448/gems/nokogiri-1.4.7/ext/nokogiri/gem_make.out and tell us the error logged there. I have a hunch that you don't have xml tools on your machine. Log messages from that file will confirm it.

To install nokogiri, you need to have some packages installed already: Run the following command to install them now:

sudo apt-get install libxslt1-dev libxml2-dev

After that, run gem install nokogiri and if there are any errors, please report them again. If not, you can go back to installing opengraph.