爲什麼試圖啓動rails控制檯時會出現Readline錯誤？

Question

更新：我可能搞砸了我的系統，同時嘗試在其他地方找到解決方案。我從頭開始，Ruby 1.9.3安裝順利。我們試圖讓REE-1.8.7發揮好一起...

---

我試圖使用上的Kubuntu RVM（11.10我相信）安裝Ruby 1.9.3。到目前爲止，我一直對Readline有很多問題，但是找到了除此之外的所有答案。

我安裝了Ruby 1.9.3這樣：

rvm install 1.9.3 
# Install of ruby-1.9.3-p0 - #complete 
cd ~/.rvm/src/ruby-1.9.3-p0/ext/readline/ 
~/.rvm/src/ruby-1.9.3-p0/ext/readline $ ../../ruby extconf.rb --with-editline-dir="/usr" --with-readline-dir="/usr" 
# any other way of doing this resulted in simply readline not being loaded when trying to start the console 
# I have libreadline6 and libreadline6-dev installed (and all the packages requested in `rvm requirements` 
make install 
# compiling readline.c                                              
# linking shared-object readline.so                                           
# /usr/bin/install -c -m 0755 readline.so /home/mbillard/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/x86_64-linux                      
# installing default readline libraries 

到目前爲止，一切看起來都已經正常運行，但是當我嘗試啓動控制檯我得到這個錯誤：

/home/mbillard/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/irb/completion.rb:9:in `require': /home/mbillard/.rvm/usr/lib/libreadline.so.6: undefined symbol: UP - /home/mbillard/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/x86_64-linux/readline.so (LoadError) 
    from /home/mbillard/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/irb/completion.rb:9:in `<top (required)>' 
    from /home/mbillard/.rvm/gems/ruby-1.9.3-p0@taskman/gems/railties-3.2.1/lib/rails/commands/console.rb:3:in `require' 
    from /home/mbillard/.rvm/gems/ruby-1.9.3-p0@taskman/gems/railties-3.2.1/lib/rails/commands/console.rb:3:in `<top (required)>' 
    from /home/mbillard/.rvm/gems/ruby-1.9.3-p0@taskman/gems/railties-3.2.1/lib/rails/commands.rb:38:in `require' 
    from /home/mbillard/.rvm/gems/ruby-1.9.3-p0@taskman/gems/railties-3.2.1/lib/rails/commands.rb:38:in `<top (required)>' 
    from script/rails:6:in `require' 
    from script/rails:6:in `<main>' 

我試着在上面的命令中使用rvm install 1.9.3 --with-readline-dir="$rvm_path/usr"並使用$rvm_path編譯Readline時導致出現此錯誤：

checking for tgetnum() in -lncurses... yes 
checking for readline/readline.h... yes 
checking for readline/history.h... yes 
checking for readline() in -lreadline... no 
checking for readline() in -ledit... no 
checking for editline/readline.h... no 

所以，感謝您提供的任何幫助。

Answer 1

請閱讀的輸出：

rvm requirements 

它會告訴你，你需要安裝利用好紅寶石

的安裝所有的庫之後的庫列表，清潔RVM安裝庫，並重新安裝Ruby：

rm -rf $rvm_path/usr 
rvm reinstall 1.9.3 

Answer 2

您需要安裝readline開發包。 （這是我的回答與其他現有的區別）：

apt-get install libreadline-dev 

這樣做之後，可以重新安裝紅寶石（前面已經提到@mpapis），一切都應該工作。

rvm reinstall 1.9.3 

Answer 3

我有類似的問題。嘗試

brew link readline --force 

那爲我工作。

我從這裏的解決方案：

Rails Console Not Loading