# Fastthread installation fails - debian - w or w/o gem

**URL:** <https://www.ruby-forum.com/t/fastthread-installation-fails-debian-w-or-w-o-gem/86837>\
**Category:** Ruby\
**Created:** [February 26, 2007, 10:41am UTC](https://www.ruby-forum.com/t/fastthread-installation-fails-debian-w-or-w-o-gem/86837 "2007-02-26T10:41:17Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [February 26, 2007, 10:41am UTC](https://www.ruby-forum.com/t/fastthread-installation-fails-debian-w-or-w-o-gem/86837/1 "2007-02-26T10:41:17Z")

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Hi,

## iam trying to install fastthread, but it fails with the message:

Building native extensions. This could take a while…  
extconf.rb:1:in `require’: no such file to load – mkmf (LoadError)  
from extconf.rb:1

ERROR: While executing gem … (RuntimeError)  
ERROR: Failed to build gem native extension.  
Gem files will remain installed in /var/lib/gems/1.8/gems/  
fastthread-0.6.4.1 for inspection.

## Results logged to /var/lib/gems/1.8/gems/fastthread-0.6.4.1/ext/ fastthread/gem\_make.out

i tried it both with gem install fastthread and by downloading it from  
the project  
website und install it with ruby setup.rb =\> Same result

Iam realy new with ruby so i don’t know what to do. google didnt help  
me anyway… I’d be happy if someone could give me a hint…

Pascal F.

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<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [February 26, 2007, 10:45am UTC](https://www.ruby-forum.com/t/fastthread-installation-fails-debian-w-or-w-o-gem/86837/2 "2007-02-26T10:45:17Z")

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On Mon, Feb 26, 2007 at 06:40:05PM +0900, removed\_email\_address@domain.invalid wrote:

> Hi,
> 
> ## iam trying to install fastthread, but it fails with the message:
> 
> Building native extensions. This could take a while…  
> extconf.rb:1:in `require’: no such file to load – mkmf (LoadError)  
> from extconf.rb:1

For Debian/Ubuntu, you need to install the ruby1.8-dev package to get  
mkmf  
(which is a standard part of Ruby, it’s just that Debian broke up the  
core  
Ruby into shrapnel packages)

HTH,

Brian.

---

<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [February 26, 2007, 10:56am UTC](https://www.ruby-forum.com/t/fastthread-installation-fails-debian-w-or-w-o-gem/86837/3 "2007-02-26T10:56:18Z")

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On 26 Feb., 10:44, Brian C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> For Debian/Ubuntu, you need to install the ruby1.8-dev package to get mkmf  
> (which is a standard part of Ruby, it’s just that Debian broke up the core  
> Ruby into shrapnel packages)

works. thanks so much!

---

<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [February 26, 2007, 8:33pm UTC](https://www.ruby-forum.com/t/fastthread-installation-fails-debian-w-or-w-o-gem/86837/4 "2007-02-26T20:33:50Z")

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On Mon, 26 Feb 2007 18:40:05 +0900, “removed\_email\_address@domain.invalid”  
[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> Hi,
> 
> ## iam trying to install fastthread, but it fails with the message:
> 
> Building native extensions. This could take a while…  
> extconf.rb:1:in `require’: no such file to load – mkmf (LoadError)  
> from extconf.rb:1

You will need to install the ruby1.8-dev Debian package in order to be  
able to install gems with C extensions (like fastthread).

-mental