lin

jamie@icf109118-Ubuntu:~/workspace_ruby/cwo_rails3/railz$ gem install linecache19
Building native extensions.  This could take a while...
ERROR:  Error installing linecache19:
	ERROR: Failed to build gem native extension.

        /home/jamie/.rvm/rubies/jruby-1.6.5/bin/jruby extconf.rb
WARNING: JRuby does not support native extensions or the `mkmf' library very well.
Check http://kenai.com/projects/jruby/pages/Home for alternatives.
JRuby limited openssl loaded. http://jruby.org/openssl
gem install jruby-openssl for full support.
checking for vm_core.h... no
checking for vm_core.h... no
Requesting http://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.2-p136.tar.gz
Not modified since last download
Zlib::GzipFile::Error: not in gzip format
  create_makefile_with_core at /home/jamie/.rvm/gems/jruby-1.6.5@rails-3/gems/ruby_core_source-0.1.5/lib/ruby_core_source.rb:57
                       open at org/jruby/RubyTempfile.java:265
  create_makefile_with_core at /home/jamie/.rvm/gems/jruby-1.6.5@rails-3/gems/ruby_core_source-0.1.5/lib/ruby_core_source.rb:51
                     (root) at extconf.rb:19
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You 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/jamie/.rvm/rubies/jruby-1.6.5/bin/jruby
	--with-ruby-dir
	--without-ruby-dir
	--with-ruby-include
	--without-ruby-include=${ruby-dir}/include
	--with-ruby-lib
	--without-ruby-lib=${ruby-dir}/lib


Gem files will remain installed in /home/jamie/.rvm/gems/jruby-1.6.5@rails-3/gems/linecache19-0.5.12 for inspection.
Results logged to /home/jamie/.rvm/gems/jruby-1.6.5@rails-3/gems/linecache19-0.5.12/ext/trace_nums/gem_make.out