Install fails on jruby-1.6.7.2-d19 about oj HOT 5 CLOSED

See Travis' docs regarding JRuby and C extensions:

JRuby: C extensions support is disabled

Please note that C extensions are disabled for JRuby on travis-ci.org. The reason for doing so is to bring it to developers attention that their project may have dependencies that should not be used on JRuby in production. Using C extensions on JRuby is technically possible but is not a good idea performance and stability-wise and we believe continuous integration services like Travis should highlight it.

So if you want to run CI against JRuby, please check that your Gemfile takes JRuby into account. Most of popular C extensions these days also have Java implementations (jsom gem, nokogiri, eventmachine, bson gem) or Java alternatives (like JDBC-based drivers for MySQL, PostgreSQL and so on).

from oj.

"Please note that C extensions are disabled for JRuby on travis-ci.org. The reason for doing so is to bring it to developers attention that their project may have dependencies that should not be used on JRuby in production."

Should Oj's documentation mention that JRuby support requires C extensions to be enabled?

I don't see this mentioned within the repository.

$ git remote show origin

• remote origin
  Fetch URL: https://github.com/ohler55/oj.git
  ...

$ ack -i jruby *

README.md
60:Oj is compatible with Ruby 1.8.7, 1.9.2, 1.9.3, JRuby, RBX, and the latest 2.0dev.

build_test.sh
7: jruby-1.6.7\

ext/oj/fast.c
365:#ifdef JRUBY_RUBY

ext/oj/oj.c
313:#ifndef JRUBY_RUBY
314: // JRuby gets confused with what is the real fileno.

test/test_mimic.rb
75: if 'rubinius' == $ruby || 'jruby' == $ruby || '1.8.7' == RUBY_VERSION
(END)

from oj.

I added a comment in the README.md to note that JRuby must be built with extensions enabled.

from oj.

@ohler55 Thanks so much and I really appreciate all your hard work with this gem!

from oj.

Always nice to hear, thanks.

from oj.