Cannot Install ruby-oci8 on Ubuntu 12.04LTS -

i execute

$ bundle install 

for rails application... (3.2.8)

right when gets ruby-oci8 ...

    gem::installer::extensionbuilderror: error: failed build gem native extension.      /home/ubuntu/.rvm/rubies/ruby-1.9.3-p448/bin/ruby extconf.rb  checking load library path...    ld_library_path...      checking /usr/lib/oracle/12.1/client/... no   checking ld.so.conf... no checking cc... ok checking gcc... yes checking lp64... no checking sys/types.h... yes checking ruby header... ok version of oracle sql*plus... *** extconf.rb failed *** not create makefile due reason, lack of necessary libraries and/or headers.  check mkmf.log file more details.  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=/home/ubuntu/.rvm/rubies/ruby-1.9.3-p448/bin/ruby     --with-instant-client     --without-instant-client /home/ubuntu/.rvm/gems/ruby-1.9.3-p448/gems/ruby-oci8-2.1.5/ext/oci8/oraconf.rb:760:in `get_version': runtimeerror (runtimeerror)     /home/ubuntu/.rvm/gems/ruby-1.9.3-p448/gems/ruby-oci8-2.1.5/ext/oci8/oraconf.rb:709:in `initialize'     /home/ubuntu/.rvm/gems/ruby-1.9.3-p448/gems/ruby-oci8-2.1.5/ext/oci8/oraconf.rb:320:in `new'     /home/ubuntu/.rvm/gems/ruby-1.9.3-p448/gems/ruby-oci8-2.1.5/ext/oci8/oraconf.rb:320:in `get'     extconf.rb:18:in `<main>' --------------------------------------------------- error message:   cannot oracle version sqlplus backtrace:   /home/ubuntu/.rvm/gems/ruby-1.9.3-p448/gems/ruby-oci8-2.1.5/ext/oci8/oraconf.rb:760:in `get_version'   /home/ubuntu/.rvm/gems/ruby-1.9.3-p448/gems/ruby-oci8-2.1.5/ext/oci8/oraconf.rb:709:in `initialize'   /home/ubuntu/.rvm/gems/ruby-1.9.3-p448/gems/ruby-oci8-2.1.5/ext/oci8/oraconf.rb:320:in `new'   /home/ubuntu/.rvm/gems/ruby-1.9.3-p448/gems/ruby-oci8-2.1.5/ext/oci8/oraconf.rb:320:in `get'   extconf.rb:18:in `<main>' --------------------------------------------------- see:  * http://ruby-oci8.rubyforge.org/en/howtoinstall.html  * http://ruby-oci8.rubyforge.org/en/reportinstallproblem.html    gem files remain installed in /home/ubuntu/.rvm/gems/ruby-1.9.3-p448/gems/ruby-oci8-2.1.5 inspection. results logged /home/ubuntu/.rvm/gems/ruby-1.9.3-p448/gems/ruby-oci8-2.1.5/ext/oci8/gem_make.out  error occurred while installing ruby-oci8 (2.1.5), , bundler cannot continue. make sure `gem install ruby-oci8 -v '2.1.5'` succeeds before bundling. 

i did every site , forum (especially here). 1 feel closest... http://jigyasamakkar.com/ruby-oci8-with-rails-3-1-on-ubuntu/

what best way solve issue?

i had install oracle + ruby gem, here instructions mac (but work ubuntu). full instructions at:

http://blog.codiez.co.za/2013/09/setup-oracle-instant-client-ruby-oci8-gem-mac/

the key ruby-oci gem needs know dynamic libraries stored. ubuntu need set: ld_library_path

grab following files:

• instantclient-basic-linux.x64-11.2.0.3.0.zip
• instantclient-sqlplus-linux.x64-11.2.0.3.0.zip
• instantclient-sdk-linux.x64-11.2.0.3.0.zip

extract them , put them somewhere, , add following environment variables. see link detailed instructions.

export oracle_base=/usr/local/oracle export oracle_home=$oracle_base/product/instantclient_64/11.2.0.3.0 export path=$oracle_home/bin:$path export ld_library_path=$oracle_home/lib:$dyld_library_path export tns_admin=$oracle_base/admin/network 

explanation of environment variables:

oracle_base: files stored oracle_home: path actual client ld_library_path: should point the lib directory, make sure have sdk zip file extracted here tns_admin: find tns_admin file (not necessary ruby-oci gem)