C:\dev\blade_copy\digitalarchive_trunk>gem install ultraviolet
Building native extensions. This could take a while…
ERROR: Error installing ultraviolet:
ERROR: Failed to build gem native extension.
c:/ruby18/bin/ruby.exe extconf.rb
checking for main() in -lonig… no
creating Makefile
make
gcc -I. -I. -Ic:/ruby18/lib/ruby/1.8/i386-mingw32 -I. -Wall -c oregexp.c
oregexp.c:2:23: oniguruma.h: No such file or directory
oregexp.c:9: error: syntax error before “regex_t”
meant “you need to install with –platform=mswin32 or else install/download oniguruma headers/libraries first for windows somehow or other” 
rdp@li49-39:~/dev/ruby_core_source$ spec spec/rcs.spec
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require’: no such file to load — archive/tar/minitar (LoadError)
from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require’
meant “you are missing archive-tar-minitar-0.5.2 gem”
Comment by rogerdpack — September 3, 2009 @ 7:07 pm