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16.04：无法安装指南针

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16.04：无法安装指南针

此 ubuntu 版本带来了ruby 2.3.1p112 (2016-04-26) [x86_64-linux-gnu]。所以我所做的安装都是正常过程，但是gem install compass此安装引发此错误：

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

    current directory: /var/lib/gems/2.3.0/gems/ffi-1.9.14/ext/ffi_c
/usr/bin/ruby2.3 -r ./siteconf20160907-12074-v2oz2d.rb extconf.rb
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h

extconf failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.3.0/gems/ffi-1.9.14 for inspection.
Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/ffi-1.9.14/gem_make.out

我尝试ruby-dev使用 root 身份执行的命令进行安装apt get install ruby-dev，但由于某种原因，该命令在 ubuntu 上不可用，并抛出了此错误：

Package ruby-dev is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'ruby-dev' has no installation candidate

答案1

compass由于缺少 ruby​​-dev 安装，安装失败。

ruby-dev 包含在 Ubuntu 的存储库中。您必须更新存储库才能获得完整可用的软件包和依赖项。

执行以下命令来做到这一点：

$ sudo apt update
$ sudo apt upgrade
$ sudo apt full-upgrade
$ sudo apt install ruby-dev

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