I need to build apache ODE 1.3.5 from the source. Building from the source is important for me because we plan to make some changes in the ODE code. I tried out their instructions for building. I was able to install jruby 1.5.1 but I was not able to install buildr 1.4.4 using the said version of jruby. I googled a bit and it seemed like I had to upgrade to jruby 1.6.2. After the newer version of jruby(1.6.2), I was able to install buildr 1.4.4 but when I go to the root of the ODE source and execute the following command
buildr package test=no
I get the below exceptions on the console
LoadError: no such file to load -- rubygems/source_info_cache
require at org/jruby/RubyKernel.java:1038
require at c:/jruby-1.6.2/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:29
(root) at c:/jruby-1.6.2/lib/ruby/gems/1.8/gems/buildr-1.4.4-java/lib/buildr/core/application.rb:41
require at org/jruby/RubyKernel.java:1038
require at c:/jruby-1.6.2/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:29
(root) at c:/jruby-1.6.2/lib/ruby/gems/1.8/gems/buildr-1.4.4-java/lib/buildr/core/application.rb:17
require at org/jruby/RubyKernel.java:1038
require at c:/jruby-1.6.2/lib/ruby/gems/1.8/gems/buildr-1.4.4-java/lib/buildr/core.rb:29
(root) at c:/jruby-1.6.2/lib/ruby/gems/1.8/gems/buildr-1.4.4-java/lib/buildr.rb:20
require at org/jruby/RubyKernel.java:1038
require at c:/jruby-1.6.2/lib/ruby/gems/1.8/gems/buildr-1.4.4-java/lib/buildr.rb:29
(root) at c:/jruby-1.6.2/lib/ruby/gems/1.8/gems/buildr-1.4.4-java/bin/buildr:18
load at org/jruby/RubyKernel.java:1063
(root) at c:\jruby-1.6.2\bin\buildr:19
I have no idea what I am doing wrong. This is my first interaction with jruby as well as buildr. I appreciate any pointers towards the building of this repository.
Edit 1: Below is the result of jruby -S gem list after installing jruby 1.7.13 and buildr 1.4.19
C:\Users\16030053.CS-6606-DT>jruby -S gem list
*** LOCAL GEMS ***
atoulme-Antwrap (0.7.5 java)
bouncy-castle-java (1.5.0147)
builder (3.2.2)
buildr (1.4.19 java)
bundler (1.15.3)
diff-lcs (1.2.4)
ffi (1.9.3 java)
hoe (3.7.1)
jruby-openssl (0.9.5 java, 0.8.10)
jruby-pageant (1.1.1 java)
jruby-win32ole (0.8.5)
json (1.8.0 java)
json_pure (1.8.0)
krypt (0.0.2)
krypt-core (0.0.2 universal-java)
krypt-provider-jdk (0.0.2)
minitar (0.5.4)
net-sftp (2.1.2)
net-ssh (2.7.0)
orderedhash (0.0.6)
rake (10.1.0, 0.9.2.2)
rdoc (4.0.1)
rspec (2.14.1)
rspec-core (2.14.5)
rspec-expectations (2.14.3)
rspec-mocks (2.14.3)
rubyzip (0.9.9)
xml-simple (1.1.2)
C:\Users\16030053.CS-6606-DT>
Edit 2 When I execute the command buildr package test=no --trace in apache-ode-sources-1.3.5, I get the following errors
F:\apache-ode-sources-1.3.5>buildr package test=no --trace
Buildr aborted!
SyntaxError : F:/apache-ode-sources-1.3.5/tasks/jbi.rake:79: formal argument cannot be an instance variable
Tempfile.open("MANIFEST.MF") { |#jbi_xml_tmp| #jbi_xml_tmp.write descriptor }
^
org/jruby/RubyKernel.java:1081:in `load'
c:/jruby-1.7.13/lib/ruby/gems/shared/gems/buildr-1.4.19-java/lib/buildr/core/application.rb:1:in `(root)'
org/jruby/RubyArray.java:1613:in `each'
c:/jruby-1.7.13/lib/ruby/gems/shared/gems/buildr-1.4.19-java/lib/buildr/core/application.rb:497:in `load_tasks'
c:/jruby-1.7.13/lib/ruby/gems/shared/gems/buildr-1.4.19-java/lib/buildr/core/application.rb:494:in `load_tasks'
c:/jruby-1.7.13/lib/ruby/gems/shared/gems/buildr-1.4.19-java/lib/buildr/core/application.rb:224:in `load_buildfile'
c:/jruby-1.7.13/lib/ruby/gems/shared/gems/buildr-1.4.19-java/lib/buildr/core/application.rb:535:in `standard_exception_handling'
c:/jruby-1.7.13/lib/ruby/gems/shared/gems/buildr-1.4.19-java/lib/buildr/core/application.rb:220:in `load_buildfile'
c:/jruby-1.7.13/lib/ruby/gems/shared/gems/buildr-1.4.19-java/lib/buildr/core/application.rb:130:in `run'
c:/jruby-1.7.13/lib/ruby/gems/shared/gems/buildr-1.4.19-java/lib/buildr/core/application.rb:535:in `standard_exception_handling'
c:/jruby-1.7.13/lib/ruby/gems/shared/gems/buildr-1.4.19-java/lib/buildr/core/application.rb:128:in `run'
org/jruby/RubyKernel.java:1081:in `load'
c:\jruby-1.7.13\bin\buildr:23:in `(root)'
F:\apache-ode-sources-1.3.5>
Below is the response of #sathwik on apache-ode mailing list that helped me compile the ode source for version 1.3.5
Hi Muhammad,
Use jruby 1.7.13 and buildr 1.4.19
Edit file <ode 1.3.5 source>/tasks/jbi.rake. Find and Replace the
initialize method with the content below
def initialize(*args)
super
prepare { path("lib").include((component.libs +
bootstrap.libs).flatten.uniq) }
enhance do
case jbi_xml
when String
path("META-INF").include jbi_xml.path, :as=>"jbi.xml"
when nil, true
# Tempfiles gets deleted on garbage collection, so we're going to
hold on to it
# through instance variable not closure variable.
#jbi_xml_tmp = Tempfile.new('MANIFEST.MF')
#jbi_xml_tmp.write descriptor
path("META-INF").include #jbi_xml_tmp.path, :as=>"jbi.xml"
#jbi_xml_tmp.close
when Proc, Method
#jbi_xml_tmp = Tempfile.new('MANIFEST.MF')
#jbi_xml_tmp.write jbi_xml.call.to_s
path("META-INF").include #jbi_xml_tmp.path, :as=>"jbi.xml"
#jbi_xml_tmp.close
end
end
end
Besides the above changes I had to change line 37 of dependencies.rb
file from
AXIS2_WAR = "org.apache.axis2:axis2-webapp:war:1.3" to
AXIS2_WAR = "org.apache.axis2:axis2-webapp:war:1.6.2"
The above change was needed because all the repositories containing
reference to axis2-webapp:war:1.3 are down. Furthermore, you need to
add following line at the end of repositories.rb file
repositories.remote << "http://people.apache.org/~vanto/m2/"
This is required to fulfill one of the required dependencies namely
xdoclet:xjavadoc-1.1-j5.
Related
When I am installing Firestore by using the command pod 'Firebase/Firebase' in my pod file, I keep on getting JSON parse error. Here are the contents of my pod file:
platform :ios, '13.0'
target 'Flash Chat iOS13' do
use_frameworks!
# Pods for Flash Chat iOS13
pod 'CLTypingLabel', '~> 0.4.0'
pod 'Firebase/Auth'
pod 'Firebase/Firestore'
end
Here is the error I am getting:
Analyzing dependencies
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Command
/usr/local/bin/pod install
Report
What did you do?
What did you expect to happen?
What happened instead?
Stack
CocoaPods : 1.10.0
Ruby : ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin20]
RubyGems : 3.2.3
Host : macOS 11.0.1 (20B29)
Xcode : 12.2 (12B45b)
Git : git version 2.24.3 (Apple Git-128)
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib
Repositories : trunk - CDN - https://cdn.cocoapods.org/
Plugins
cocoapods-deintegrate : 1.0.4
cocoapods-plugins : 1.0.0
cocoapods-search : 1.0.0
cocoapods-stats : 1.1.0
cocoapods-trunk : 1.5.0
cocoapods-try : 1.2.0
Podfile
platform :ios, '13.0'
target 'Flash Chat iOS13' do
use_frameworks!
# Pods for Flash Chat iOS13
pod 'CLTypingLabel', '~> 0.4.0'
pod 'Firebase/Auth'
pod 'Firebase/Firestore'
end
Error
JSON::ParserError - 416: unexpected token at '"src/core/lib/http/httpcli'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/json/common.rb:156:in `parse'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/json/common.rb:156:in `parse'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/specification/json.rb:61:in `from_json'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/specification.rb:742:in `from_string'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/specification.rb:716:in `from_file'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/source.rb:186:in `specification'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/specification/set.rb:58:in `block in specification_name'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/specification/set.rb:56:in `each'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/specification/set.rb:56:in `specification_name'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/cdn_source.rb:216:in `search'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/source/aggregate.rb:83:in `block in search'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/source/aggregate.rb:83:in `select'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/source/aggregate.rb:83:in `search'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/resolver.rb:416:in `create_set_from_sources'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/resolver.rb:385:in `find_cached_set'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/resolver.rb:360:in `specifications_for_dependency'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/resolver.rb:165:in `search_for'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/resolver.rb:274:in `block in sort_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/resolver.rb:267:in `each'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/resolver.rb:267:in `sort_by'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/resolver.rb:267:in `sort_dependencies'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/delegates/specification_provider.rb:53:in `block in sort_dependencies'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/delegates/specification_provider.rb:70:in `with_no_such_dependency_error_handling'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/delegates/specification_provider.rb:52:in `sort_dependencies'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:754:in `push_state_for_requirements'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:746:in `require_nested_dependencies_for'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:729:in `activate_new_spec'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:686:in `attempt_to_activate'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:254:in `process_topmost_state'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:182:in `resolve'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolver.rb:43:in `resolve'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/resolver.rb:94:in `resolve'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer/analyzer.rb:1074:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer/analyzer.rb:1072:in `resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer/analyzer.rb:124:in `analyze'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer.rb:414:in `analyze'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer.rb:239:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer.rb:238:in `resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer.rb:160:in `install!'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/command/install.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'
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[!] Oh no, an error occurred.
Search for existing GitHub issues similar to yours:
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I also tried the following debugging steps before posting this question:
I followed the steps given in the stackoverflow discussion Error Installing 'pod Firebase/Firestore' in my iOS app, but that did not work for me.
I also tried removing the pod cache and dependencies from the project, but it still did not work
I uninstalled and reinstalled cocoapods but the issues still persisted.
I also read that this issue can be an outdated version of pod. However, my current pod version is 1.10.0. I tried downgrading my pod version to 1.9.0 and it still did not work.
I was wondering what can my issue be here. I am debugging this issues from almost a day now, but I keep on getting the same error. Is there any other way I can fix this issue or can get a way around it?
I cannot install openproject in my system, i have followed all the steps mentioned in the openproject wiki document
I have Windows 7 64 bit and
installed ruby using railsinstaller 2.2.4 from here
mysql mysql-5.6.21-winx64 from here
mysql 32 bit client from here
openproject from git location
Followed document from openproject guide.
i am getting following error,kindly guide to get rid of this issue.
I am very new to Ruby
C:\Users\Administrator\openproject>bundle exec rake db:create:all
require 'rails/all'... 2.309s
Bundler.require... rake aborted!
NoMethodError: undefined method `dlopen' for Fiddle:Module
C:/Users/Administrator/openproject/config/application.rb:68:in `block in <top (required)>'
C:/Users/Administrator/openproject/config/application.rb:44:in `block in bench'
C:/Users/Administrator/openproject/config/application.rb:43:in `bench'
C:/Users/Administrator/openproject/config/application.rb:67:in `<top (required)>'
C:/Users/Administrator/openproject/Rakefile:33:in `require'
C:/Users/Administrator/openproject/Rakefile:33:in `<top (required)>'
(See full trace by running task with --trace)
This does not appear to be a problem with openproject, but rather one with the railsinstaller version you are using. It will go away when you make sure you're using a ruby version above 1.9.3
The openproject installation guide lists ruby 2.1 as a minimal requirement. Unfortunately it seems that there is no railsinstaller that provides a ruby above 1.9, that would render openproject incompatible with railsinstaller on your machine.
Maybe you want to try the railsinstaller-windows 3.0.0-alpha2 with Ruby 2.0.0. Obviously this setup is can not be recommended for production but at least you might be able to get everything running.
I have JRuby + Swing application and want to add jdbc/mysql there
require "jdbc/mysql"
But when I'm trying to run it, I have the followig error:
LoadError: no such file to load -- jdbc/mysql
require at org/jruby/RubyKernel.java:1033
(root) at olap_frontend.rb:3
My gem list:
*** LOCAL GEMS ***
activerecord-jdbc-adapter (1.2.2)
activerecord-jdbcmysql-adapter (1.2.2)
bouncy-castle-java (1.5.0146.1)
bundler (1.1.3 ruby)
jdbc-mysql (5.1.13)
jruby-launcher (1.0.12 java)
jruby-openssl (0.7.6.1)
rake (0.9.2, 0.8.7)
rubygems-bundler (0.3.0 ruby)
What I'm doing wrong?
It was my fault - I need to require rubygems first
I've been wrestling with this problem for a day or so and cannot figure out what's going on. I'm trying to run a script to import my Wordpress .sql into Jekyll and convert everything to markdown. But every time I run the script (on both Mac and Ubuntu) I'm getting an error. I'm at a loss of what to do. Here's my terminal output and gem list:
jason#ubuntu:~$ ruby -r './wordpress.rb' -e 'Jekyll::WordPress.process( "#{ENV["DB"]}", "#{ENV["USER"]}", "#{ENV["PASS"]}")'
/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': LoadError: no such file to load -- mysql (Sequel::AdapterNotFound)
from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `require'
from /var/lib/gems/1.8/gems/sequel-3.22.0/lib/sequel/adapters/mysql.rb:4
from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `k_require'
from /var/lib/gems/1.8/gems/sequel-3.22.0/lib/sequel/core.rb:249:in `tsk_require'
from /var/lib/gems/1.8/gems/sequel-3.22.0/lib/sequel/core.rb:72:in `check_requiring_thread'
from /var/lib/gems/1.8/gems/sequel-3.22.0/lib/sequel/core.rb:69:in `synchronize'
from /var/lib/gems/1.8/gems/sequel-3.22.0/lib/sequel/core.rb:69:in `check_requiring_thread'
from /var/lib/gems/1.8/gems/sequel-3.22.0/lib/sequel/core.rb:249:in `tsk_require'
from /var/lib/gems/1.8/gems/sequel-3.22.0/lib/sequel/database/connecting.rb:25:in `adapter_class'
from /var/lib/gems/1.8/gems/sequel-3.22.0/lib/sequel/database/connecting.rb:63:in `connect'
from /var/lib/gems/1.8/gems/sequel-3.22.0/lib/sequel/core.rb:119:in `connect'
from /var/lib/gems/1.8/gems/sequel-3.22.0/lib/sequel/core.rb:282:in `adapter_method'
from /var/lib/gems/1.8/gems/sequel-3.22.0/lib/sequel/core.rb:289:in `mysql'
from ./wordpress.rb:35:in `process'
from -e:1
jason#ubuntu:~$ gem list
*** LOCAL GEMS ***
classifier (1.3.3)
directory_watcher (1.4.0)
fast-stemmer (1.0.0)
jekyll (0.10.0)
liquid (2.2.2)
maruku (0.6.0)
sequel (3.22.0)
syntax (1.0.0)
I'm using Paul Stamatiou's adapted script. Thanks ahead of time for any suggestions!
If you focus on the actual error message:
LoadError: no such file to load -- mysql
It's fairly obvious that you need to install the mysql gem:
gem install mysql
Windows XP. Ruby 1.9.2. Rails installed. MySQL installed. When I try to run gem install mysql2 (or bundle install) I get errors:
C:\ruby\cred2>gem install mysql2
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
C:/Ruby192/bin/ruby.exe extconf.rb
checking for rb_thread_blocking_region()... *** 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=C:/Ruby192/bin/ruby
C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': The complier failed to genera
te an executable file. (RuntimeError)
You have to install development tools first.
from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:435:in `try_link0'
from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:440:in `try_link'
from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:552:in `try_func'
from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:797:in `block in have_func'
from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:693:in `block in checking_for'
from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:280:in `block (2 levels) in postp
one'
from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:254:in `open'
from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:280:in `block in postpone'
from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:254:in `open'
from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:276:in `postpone'
from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:692:in `checking_for'
from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:796:in `have_func'
from extconf.rb:9:in `<main>'
Gem files will remain installed in C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.
2.4 for inspection.
Results logged to C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.2.4/ext/mysql2/ge
m_make.out
C:\ruby\cred2>
Just for the record: The problem should be solved!
The mysql2 gem v.0.2.6 is out, having win32 support.
gem install mysql2 worked without problems now (DevKit installed).
See: http://github.com/brianmario/mysql2/issues/issue/8#issue/8/comment/479748
I guess that this gem uses C bindings and so has to be compiled. To do that in Windows you'd probably need to have the whole mingw (or possibly cygwin) environment set up. And still, I'm not sure this will help.
You can try to use mysql or ruby-mysql on your Windows machine.
if you haven't installed DevKit yet, this is the way to go.
I did it yesterday it worked perfectly (i have a Win XP box too).
the installation process is relatively straightforward (but well documented)
http://www.rubyinstaller.org/add-ons/devkit/