安裝Whirlpool gem失敗？

Question

我正在嘗試使用gem安裝digest-whirlpool ，但出現錯誤：

Building native extensions.  This could take a while...
ERROR:  Error installing digest-whirlpool:
    ERROR: Failed to build gem native extension.

        /usr/bin/ruby1.9.1 extconf.rb
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError)
    from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from extconf.rb:1:in `<main>'


Gem files will remain installed in /var/lib/gems/1.9.1/gems/digest-whirlpool-1.0.2 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/digest-whirlpool-1.0.2/ext/digest/whirlpool/gem_make.out

為什么會這樣呢？

編輯：Debian測試，紅寶石1：1.9.3

Answer 1

您可以嘗試安裝-dev版本的ruby。

嘗試：

sudo aptitude install ruby1.9.1-dev

但是，如果我建議的話，RVM（ https://rvm.io ）使得處理不同版本的紅寶石變得非常容易。