# gem install ruby-debug

**URL:** <https://discuss.rubyonrails.org/t/gem-install-ruby-debug/41298>\
**Category:** rubyonrails-talk\
**Created:** [April 7, 2009, 4:40am UTC](https://discuss.rubyonrails.org/t/gem-install-ruby-debug/41298 "2009-04-07T04:40:31Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![11175](https://avatars.discourse-cdn.com/v4/letter/1/8edcca/32.png) [@11175](https://discuss.rubyonrails.org/u/11175)\
**Post date:** [April 7, 2009, 4:40am UTC](https://discuss.rubyonrails.org/t/gem-install-ruby-debug/41298/1 "2009-04-07T04:40:31Z")

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tinix@Creek:/home/tinix/test/grin# gem install ruby-debug Building native extensions. This could take a while... ERROR: Error installing ruby-debug: &nbsp;&nbsp;ERROR: Failed to build gem native extension.

/usr/bin/ruby1.8 extconf.rb install ruby-debug extconf.rb:1:in `require': no such file to load -- mkmf (LoadError) &nbsp;&nbsp;from extconf.rb:1

Gem files will remain installed in /var/lib/gems/1.8/gems/linecache-0.43 for inspection. Results logged to /var/lib/gems/1.8/gems/linecache-0.43/ext/gem\_make.out tinix@Creek:/home/tinix/test/grin#

what is the problem ..???

Thanks Tinix./

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**Author:** ![Frederick\_Cheung](https://sea2.discourse-cdn.com/rubyonrails/user_avatar/discuss.rubyonrails.org/frederick_cheung/32/3901_2.png) [@Frederick\_Cheung](https://discuss.rubyonrails.org/u/Frederick_Cheung)\
**Post date:** [April 7, 2009, 7:47am UTC](https://discuss.rubyonrails.org/t/gem-install-ruby-debug/41298/2 "2009-04-07T07:47:48Z")

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> tinix@Creek:/home/tinix/test/grin# gem install ruby-debug Building native extensions. This could take a while... ERROR: Error installing ruby-debug: ERROR: Failed to build gem native extension.
> 
> /usr/bin/ruby1.8 extconf.rb install ruby-debug extconf.rb:1:in `require': no such file to load -- mkmf (LoadError) from extconf.rb:1
> 
> Gem files will remain installed in /var/lib/gems/1.8/gems/linecache-0.43 for inspection. Results logged to /var/lib/gems/1.8/gems/linecache-0.43/ext/gem\_make.out tinix@Creek:/home/tinix/test/grin#
> 
> what is the problem ..???

That usually means that you don't have the development headers for ruby (often a separate package on most linux distributions, eg ruby- dev or ruby-devel)

Fred

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<div class="post-metadata">

**Author:** ![11175](https://avatars.discourse-cdn.com/v4/letter/1/8edcca/32.png) [@11175](https://discuss.rubyonrails.org/u/11175)\
**Post date:** [April 7, 2009, 1:04pm UTC](https://discuss.rubyonrails.org/t/gem-install-ruby-debug/41298/3 "2009-04-07T13:04:57Z")

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Frederick Cheung wrote:

> > for inspection. Results logged to /var/lib/gems/1.8/gems/linecache-0.43/ext/gem\_make.out tinix@Creek:/home/tinix/test/grin#
> > 
> > what is the problem ..???
> 
> That usually means that you don't have the development headers for ruby (often a separate package on most linux distributions, eg ruby- dev or ruby-devel)
> 
> Fred

Thank Fred...!!! look this the package is ruby1.8-dev then install

tinix@Creek:/#sudo gem install ruby-debug Building native extensions. This could take a while... Building native extensions. This could take a while... Successfully installed linecache-0.43 Successfully installed ruby-debug-base-0.10.3 Successfully installed ruby-debug-0.10.3 3 gems installed Installing ri documentation for linecache-0.43... Installing ri documentation for ruby-debug-base-0.10.3... Installing ri documentation for ruby-debug-0.10.3... Installing RDoc documentation for linecache-0.43... Installing RDoc documentation for ruby-debug-base-0.10.3... Installing RDoc documentation for ruby-debug-0.10.3... tinix@Creek:/# ok ! Again thanks Fred...!!