From: Luis Lavena <luislavena@...>
Date: 2008-02-16T10:54:56+09:00
Subject: Re: cannot install eventmachine.

On 15 feb, 23:16, Junkone <junko...@gmail.com> wrote:
> i cannot install event machine. i get error. i tried all the options.
>
> E:\Documents and Settings\Trade>gem install eventmachine
> Select which gem to install for your platform (i386-mswin32)
>  1. eventmachine 0.10.0 (ruby)
>  2. eventmachine 0.9.0 (ruby)
>  3. eventmachine 0.8.1 (i386-mswin32)
>  4. eventmachine 0.8.1 (ruby)
>  5. Skip this gem
>  6. Cancel installation> 1
>
> Building native extensions.  This could take a while...
> ERROR:  While executing gem ... (Gem::Installer::ExtensionBuildError)
>     ERROR: Failed to build gem native extension.
>
> ruby extconf.rb install eventmachine
> checking for windows.h... no
> *** 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
>         --srcdir=.
>         --curdir
>         --ruby=e:/ruby/bin/ruby
>
> Gem files will remain installed in e:/ruby/lib/ruby/gems/1.8/gems/
> eventmachine-0.10.0 for inspection.
> Results logged to e:/ruby/lib/ruby/gems/1.8/gems/eventmachine-0.10.0/
> ext/gem_make.out

You need a compiler to build native extensions. more precisely, you
need VC6 to build Ruby C extensions like eventmachine.

I'll suggest you ask the gem maintainers for updates of version 0.10.

Regards,
--
Luis Lavena