Question

 gem install fastthread -v1.0.7
Building native extensions.  This could take a while...
ERROR:  Error installing fastthread:
    ERROR: Failed to build gem native extension.

/usr/bin/ruby1.8 extconf.rb
extconf.rb:8:in `require': no such file to load -- mkmf (LoadError)
    from extconf.rb:8


Gem files will remain installed in /var/lib/gems/1.8/gems/fastthread-1.0.7 for inspection.
Results logged to /var/lib/gems/1.8/gems/fastthread-1.0.7/ext/fastthread/gem_make.out

This is what I got when I tried installing from fastthread to set up SUP mail client on my system . How to get rid of this error?

Answer 1

Install these and then try re-installing:

sudo apt-get install ruby1.8-dev

Try this link http://kenno.wordpress.com/2009/07/25/fixed-extconf-rb8in-require-no-such-file-to-load-mkmf-loaderror/