我正在尝试在Ubuntu 14.10上通过gem安装gollum。
[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
我发现需要libicu-dev。
所以我使用sudo apt-get install libicu-dev，但收到此错误：
$ 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，但错误仍然像以前一样。
如何解决该问题？谢谢！
sudo apt install libicu52=52.1-6
sudo apt-get install libicu-dev