# Cannot install eventmachine **URL:** \ **Category:** ruby-talk\ **Created:** [16 February 2008 01:19 UTC](https://rubytalk.org/t/cannot-install-eventmachine/44540 "2008-02-16T01:19:57Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Junkone](https://avatars.discourse-cdn.com/v4/letter/j/e274bd/32.png) [@Junkone](https://rubytalk.org/u/Junkone)\ **Post date:** [16 February 2008 01:19 UTC](https://rubytalk.org/t/cannot-install-eventmachine/44540/1 "2008-02-16T01:19:57Z")
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 ---
**Author:** ![Bill\_Kelly](https://avatars.discourse-cdn.com/v4/letter/b/cc9497/32.png) [@Bill\_Kelly](https://rubytalk.org/u/Bill_Kelly)\ **Post date:** [16 February 2008 01:25 UTC](https://rubytalk.org/t/cannot-install-eventmachine/44540/2 "2008-02-16T01:25:40Z")
> 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 \*\*\* What happens when you try #3 ? Regards, Bill > **···** > > From: "Junkone" \ ---
**Author:** ![Luis\_Lavena1](https://avatars.discourse-cdn.com/v4/letter/l/f08c70/32.png) [@Luis\_Lavena1](https://rubytalk.org/u/Luis_Lavena1)\ **Post date:** [16 February 2008 01:54 UTC](https://rubytalk.org/t/cannot-install-eventmachine/44540/3 "2008-02-16T01:54:56Z")
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, > **···** > > On 15 feb, 23:16, Junkone \ 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 > > -- > Luis Lavena