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新手来了 我在网站上搜索了其他类似的问题，但仍然无法解决问题。我已经安装了 Ruby 2.0.0 和 RubyGem 2.0.3，但是当我尝试安装 Rails 4.0.0 时，我得到了：

    Building native extensions.  This could take a while...
ERROR:  Error installing rails:
    ERROR: Failed to build gem native extension.
    /Users/yuanhunglo/.rvm/rubies/ruby-2.0.0-p0/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
    --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/yuanhunglo/.rvm/rubies/ruby-2.0.0-p0/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/yuanhunglo/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/mkmf.rb:431:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
    from /Users/yuanhunglo/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/mkmf.rb:516:in `try_link0'
    from /Users/yuanhunglo/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/mkmf.rb:814:in `try_run'
    from extconf.rb:22:in `<main>'


Gem files will remain installed in /Users/yuanhunglo/.rvm/gems/ruby-2.0.0-p0/gems/atomic-1.1.10 for inspection.
Results logged to /Users/yuanhunglo/.rvm/gems/ruby-2.0.0-p0/gems/atomic-1.1.10/ext/gem_make.out

我试图安装 Rails

gem install rails --version 4.0.0

我不确定设置是否有问题，或者我是否还需要安装一些东西。在此先感谢您的帮助。

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1 回答 1

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看来您正在使用 OSX。

当您无法编译某些扩展时会发生此错误，在这种情况下是由于缺少编译器（“您必须先安装开发工具”）。打开 App Store，下载 XCode，安装后，点击菜单上的“XCode”，进入 Preferences -> Downloads -> Components 并下载“Command Line Tools”。

于 2013-08-01T19:45:53.770 回答