在安装RDOC，IRB，蓝革，Fedora慢性12的问题上有问题

Question

这些错误是什么意思？

[root@localhost config]# gem install bluecloth
Building native extensions.  This could take a while...
ERROR:  Error installing bluecloth:
    ERROR: Failed to build gem native extension.

/usr/bin/ruby extconf.rb
can't find header files for ruby.


Gem files will remain installed in /usr/lib64/ruby/gems/1.8/gems/bluecloth-2.0.7 for 
inspection.
Results logged to /usr/lib64/ruby/gems/1.8/gems/bluecloth-2.0.7/ext/gem_make.out
[root@localhost config]# 

还有这个

[root@localhost config]# gem install chronic
Successfully installed json_pure-1.4.3
Successfully installed rubyforge-2.0.4
Successfully installed hoe-2.6.0
Successfully installed chronic-0.2.3
4 gems installed
/usr/lib64/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ruby_lex.rb:67: warning: 
parenthesize argument(s) for future version
ERROR:  While executing gem ... (Gem::DocumentError)
    ERROR: RDoc documentation generator not installed: no such file to load -- irb/slex
[root@localhost config]# 

我已经使用“ YUM安装Ruby-rdocs”安装了RDOC。但是我不明白这个错误意味着什么

Answer 1

yum install ruby-devel ruby-irb ruby-rdoc ruby-ri

尽管以前的命令解决了这两个问题，但请记住，在第二个错误消息的情况下，您还可以通过添加来跳过文档 --no-rdoc.

2017年4月：
--[no-]rdoc 论点已被解释，如 gem install --help. 。您现在必须使用 --no-document 在每个宝石安装或将其存储在您的 ~/.gemrc 如此解释 回答.