Error installing ruby-oci8 gem

[braham-shakti]

Can you please help me how do I install ruby-oci8 gem?

I am using jruby 1.7.27 with rails 3.1.12 but when I am running jruby -S bundle install it throws below error

Fetching ruby-oci8 2.2.6.1
Installing ruby-oci8 2.2.6.1 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

/home/user/.rvm/rubies/jruby-1.7.27/bin/jruby -r ./siteconf20181024-24801-gzbhc1.rb extconf.rb
/home/user/.rvm/rubies/jruby-1.7.27/lib/ruby/shared/mkmf.rb:14: Use RbConfig nstead of obsolete and deprecated Config.
mkmf.rb can't find header files for ruby at
/home/user/.rvm/rubies/jruby-1.7.27/lib/native/include/ruby/ruby.h

extconf failed, uncaught signal 1

Gem files will remain installed in
/home/user/.rvm/gems/jruby-1.7.27@jruby/gems/ruby-oci8-2.2.6.1 for inspection.
Results logged to
/home/user/.rvm/gems/jruby-1.7.27@jruby/extensions/universal-java-1.8/1.9/ruby-oci8-2.2.6.1/gem_make.out

An error occurred while installing ruby-oci8 (2.2.6.1), and Bundler cannot continue. Make sure that `gem install ruby-oci8 -v '2.2.6.1' --source 'http://rubygems.org/'` succeeds before bundling.

In Gemfile:
ruby-oci8

my .jrubyrc file has cext.enabled=true, but still same error, Please help Thanks

[headius]

JRuby's C extension support was only experimental in 1.6 and removed after that due to lack of performance and stability. ruby-oci8 will not be supported on JRuby unless it can be improved to not use the native OCI driver (or if it could use it via FFI).

[J-QA]

@headius, by any chance, is ruby-oci8 supported on jruby 9.2.7.0?

[headius]

@J-QA No C extensions are supported by JRuby since 1.6, and that support was very partial and very slow.

For Oracle support in Rails, we recommend the https://github.com/rsim/oracle-enhanced adapter which has solid support for JRuby. If for some reason you need a lower-level library we recommend Sequel or calling into Java's JDBC API directly.