Ferret talk - Dec 2006 - error of "no such file to load -- ferret_ext"

I''ve installed the latest version of Ferret (0.10.13) on Mac OS X
10.4.8
(Tiger) and I''m developing using Locomotive2. I installed with:
$ gem install ferret

I have a ferret_test.rb file:
----begin---------
require ''rubygems''
require ''ferret''
include Ferret
index = Index::Index.new(:path => ''/opt/search-index'')
----end-----------

I get an error when I run the test:
$ ruby test/ferret_test.rb
/Applications/Locomotive2/Bundles/rmagickRailsSept2006_ppc.locobundle/framework/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
`gem_original_require'': no such file to load -- ferret_ext (LoadError)
        from
/Applications/Locomotive2/Bundles/rmagickRailsSept2006_ppc.locobundle/framework/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
`require''
        from
/Applications/Locomotive2/Bundles/rmagickRailsSept2006_ppc.locobundle/framework/lib/ruby/gems/1.8/gems/ferret-0.10.13/lib/ferret.rb:25
        from
/Applications/Locomotive2/Bundles/rmagickRailsSept2006_ppc.locobundle/framework/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:33:in
`require''
        from test/ferret_test.rb:2

How do I resolve this issue? What is "ferret_ext" and why
isn''t it here
after the gem install?

I''ve searched the forum and googled without finding more info.

-- Daniel
kehoe at fortuity.com

-- 
Posted via http://www.ruby-forum.com/.

Excerpts from Daniel Kehoe''s message of Sat Dec 30 00:02:56 -0800
2006:
> lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
> `gem_original_require'': no such file to load -- ferret_ext
(LoadError)
I saw this message when "gem install" was unable to compile the C part
of ferret. RubyGems is not very good about handling errors, and will
happily install the gem despite them.

Make sure you have gcc, make, etc. installed, remove and re-install the
gem, and pay close attention to any error messages that might indicate
compilation problems.

-- 
William <wmorgan-ferret at masanjin.net>

Thanks William Morgan! That was the tip I needed.

I had a stock install of Mac OS X Tiger, without developer tools 
installed. When I did the "gem install ferret" I ignored the message 
that gcc and make could not be found. RubyGems gave the message that 
ferret was installed despite the fact that the C extensions were not 
compiled and installed. So I got the error "no such file to load -- 
ferret_ext" when I tried to run ferret. Here''s what I did to get
ferret
to work:

Found my Mac OS X Tiger install disk and opened the Xcode Tools folder. 
Clicked on the XcodeTools.mpkg. Started the install process and stopped 
before I clicked the "Upgrade" button. Instead clicked the
"Customize"
button and selected only "gcc 4.0" and the Software Development Kits 
"Mac OS X SDK" and "BSD SDK" (I''m not developing
Mac apps so didn''t want
to crowd my disk with extra stuff I won''t use). Then clicked
"Upgrade."
What you need gets installed as /usr/bin/gcc plus lots more in 
/usr/include. Now you can install ferret and it will compile the C 
extensions.

First I removed the broken ferret I installed earlier:
$ gem uninstall ferret

I checked that I had gcc:
$ which gcc
/usr/bin/gcc

If you can''t find it, check your bash shell path environment with:
$ env
You should have something like 
"/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"

I checked for the SDK libraries:
$ cd /usr/include
$ ls -lag
(should show lots of ".h" header files)

Then back to my development directory and ran:
$ sudo gem install ferret
Select which gem to install for your platform (powerpc-darwin7.9.0)
 1. ferret 0.10.13 (ruby)
...
Building native extensions.  This could take a while...
ruby extconf.rb install ferret
creating Makefile
...
(lots of make cruft)
make install
...
make clean
Successfully installed ferret-0.10.13
Installing ri documentation for ferret-0.10.13...
Installing RDoc documentation for ferret-0.10.13...

You can test ferret with this Ruby code in a file "ferret_test.rb"
require ''rubygems''
require ''ferret''
include Ferret
puts "ferret works!"

Try it with:
$ ruby ferret_test.rb
ferret works!

I hope this helps someone else who might be in a similar situation, 
especially if they are googling for "no such file to load --
ferret_ext"
or "Mac OS X gem install ferret" or even "installing gcc on mac
os x".

-- Daniel


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