sudo gem install fastthread しようとすると、 Select which gem to install for your platform (x86_64-linux) 1. fastthread 1.0 (ruby) 2. fastthread 1.0 (mswin32) 3. fastthread 0.6.4.1 (ruby) ...... >1 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-1.0 for inspection.
Results logged to /var/lib/gems/1.8/gems/fastthread-1.0/ext/fastthread/gem_make.out となってインストールできないんだけど設定とかの問題なの？
