如何在Ubuntu上安装libicu-dev

我正在尝试在Ubuntu14.10上安装gollum by gem

当我尝试使用

gem install gollum

时，我看到以下错误：

/usr/bin/ruby2.1 extconf.rb
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h
ERROR:  Error installing gollum:
    ERROR: Failed to build gem native extension.

    Building has failed. See above output for more information on the failure.
extconf failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.1.0/gems/charlock_holmes-0.7.3 for inspection.
Results logged to /var/lib/gems/2.1.0/extensions/x86_64-linux/2.1.0/charlock_holmes-0.7.3/gem_make.out

我发现

libicu-dev

是必需的

因此，我使用

sudo apt get install libicu dev

，但收到以下错误：

$ sudo apt-get install libicu-dev 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libicu-dev : Depends: libicu52 (= 52.1-6) but 52.1-6ubuntu0.3 is to be installed
E: Unable to correct problems, you have held broken packages.

我尝试了

apt get install-f

，但错误仍然和以前一样

我怎样才能解决这个问题？谢谢大家!

sudo apt install libicu52=52.1-6

sudo apt-get install libicu-dev

安装所需的版本。将出现降级警告，您需要确认该警告如下：

The following packages will be DOWNGRADED:
  libicu52
0 upgraded, 0 newly installed, 1 downgraded, 0 to remove and 0 not upgraded.
Need to get 7,643 kB of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] 

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虽然这个代码片段可以解决这个问题，但它确实有助于提高文章的质量。请记住，您将在将来回答读者的问题，这些人可能不知道您的代码建议的原因。还请尽量不要用解释性注释挤满你的代码，这会降低代码和解释的可读性！我确认此功能在14.10上运行，libicu55=55.1.7（`libicu dev:Depends:libicu55（=55.1-7），但将安装55.1-7ubuntu0.4`）