보석 설치 레일에 실패했습니다. 오류 : 보석 기본 확장자를 빌드하지 못했습니다.

Question

xcode, 명령 줄 도구, home brew, rvm 및 ruby를 다운로드했지만 sudo gem install rails 명령을 사용할 때 오류 메시지가 나타납니다. 어떤 도움을해야할지 잘 모르겠다. 새로운 Mac에 레일을 설치하고 싶다.

ERROR: While executing gem ... (Errno::EACCES) 
    Permission denied - /Users/cheatermoves/.rvm/gems/ruby-2.0.0-p247/gems/atomic-1.1.14/test/test_atomic.rb 
marshalls-MacBook-Air:~ cheatermoves$ sudo gem install rails 
Building native extensions. This could take a while... 
ERROR: Error installing rails: 
    ERROR: Failed to build gem native extension. 

    /Users/cheatermoves/.rvm/rubies/ruby-2.0.0-p247/bin/ruby extconf.rb 
*** extconf.rb failed *** 
Could not create Makefile due to some reason, probably lack of necessary 
libraries and/or headers. Check the mkmf.log file for more details. You may 
need configuration options. 

Provided configuration options: 
    --with-opt-dir 
    --without-opt-dir 
    --with-opt-include 
    --without-opt-include=${opt-dir}/include 
    --with-opt-lib 
    --without-opt-lib=${opt-dir}/lib 
    --with-make-prog 
    --without-make-prog 
    --srcdir=. 
    --curdir 
    --ruby=/Users/cheatermoves/.rvm/rubies/ruby-2.0.0-p247/bin/ruby 
    --with-atomic_reference-dir 
    --without-atomic_reference-dir 
    --with-atomic_reference-include 
    --without-atomic_reference-include=${atomic_reference-dir}/include 
    --with-atomic_reference-lib 
    --without-atomic_reference-lib=${atomic_reference-dir}/ 
/Users/cheatermoves/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/mkmf.rb:434:in `try_do': The compiler failed to generate an executable file. (RuntimeError) 
You have to install development tools first. 
    from /Users/cheatermoves/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/mkmf.rb:519:in `try_link0' 
    from /Users/cheatermoves/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/mkmf.rb:817:in `try_run' 
    from extconf.rb:26:in `<main>' 

Answer 1

당신은 아마 RVM sudo로를 사용하고 싶지 않아 ... 그냥보십시오 :이

gem install rails 

Answer 2

sudo gcc --version 

했을 때 엑스 코드에서 사용자 계약에 동의! (이것은 나를 위해 고쳐 준 것입니다.)