ruby-on-rails – 在Xcode 4.4和OSX 10.8安装之后 – 安装libv8时’无法构建gem native extension’

我最近将OSX升级到Mountain Lion(10.8)和 Xcode(4.4),并在试图让我的rails环境工作时遇到了问题.我开始运行bundle install并在安装libv8库时遇到错误.下面是完整错误的粘贴.我一直在寻找类似的问题,但到目前为止我在stackoverflow上找到的并没有应用到我的问题.以下是我迄今为止尝试过的几件事但无济于事：

>安装Xcode命令行工具
>安装MySQL
>安装X11
>通过gemfile安装不同版本的libv8

现在我的问题似乎超出了我的ruby技能.如果有人对我可以尝试或遇到类似问题有一些想法,我会很乐意帮助您.谢谢！

这是我的gemfile的样子：

source 'https://rubygems.org'

gem 'rails','3.2.6'
gem 'bundler'
gem 'rake'
gem 'sqlite3'
gem 'haml'
gem 'nokogiri'
gem 'whenever'
gem 'MysqL'
gem 'MysqL2'
gem 'jquery-rails'
gem 'capistrano'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails','~> 3.2.3'
  gem 'coffee-rails','~> 3.2.1'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  gem 'therubyracer',:platforms => :ruby

  gem 'uglifier','>= 1.0.3'
end

这是尝试安装gem时的错误日志：

sudo bundle install
Password:
Fetching source index for https://rubygems.org/
Using rake (0.9.2.2) 
Using i18n (0.6.0) 
Using multi_json (1.3.6) 
Using activesupport (3.2.6) 
Using builder (3.0.0) 
Using activemodel (3.2.6) 
Using erubis (2.7.0) 
Using journey (1.0.4) 
Using rack (1.4.1) 
Using rack-cache (1.2) 
Using rack-test (0.6.1) 
Using hike (1.2.1) 
Using tilt (1.3.3) 
Using sprockets (2.1.3) 
Using actionpack (3.2.6) 
Using mime-types (1.19) 
Using polyglot (0.3.3) 
Using treetop (1.4.10) 
Using mail (2.4.4) 
Using actionmailer (3.2.6) 
Using arel (3.0.2) 
Using tzinfo (0.3.33) 
Using activerecord (3.2.6) 
Using activeresource (3.2.6) 
Using bundler (1.0.15) 
Using highline (1.6.13) 
Using net-ssh (2.5.2) 
Using net-scp (1.0.4) 
Using net-sftp (2.0.5) 
Using net-ssh-gateway (1.1.0) 
Using capistrano (2.12.0) 
Using chronic (0.6.7) 
Using coffee-script-source (1.3.3) 
Using execjs (1.4.0) 
Using coffee-script (2.2.0) 
Using rack-ssl (1.3.2) 
Using json (1.7.3) 
Using rdoc (3.12) 
Using thor (0.15.4) 
Using railties (3.2.6) 
Using coffee-rails (3.2.2) 
Using haml (3.1.6) 
Using jquery-rails (2.0.2) 
Installing libv8 (3.3.10.4) with native extensions /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems/installer.rb:482:in `build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/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=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
extconf.rb:13: uninitialized constant Gem (NameError)
Checking for Python...

Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/libv8-3.3.10.4 for inspection.
Results logged to /Library/Ruby/Gems/1.8/gems/libv8-3.3.10.4/ext/libv8/gem_make.out
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems/installer.rb:445:in `each'
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems/installer.rb:445:in `build_extensions'
    from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems/installer.rb:197:in `install'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/source.rb:101:in `install'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/rubygems_integration.rb:78:in `preserve_paths'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/source.rb:91:in `install'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/installer.rb:58:in `run'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/rubygems_integration.rb:93:in `with_build_args'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/installer.rb:57:in `run'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/spec_set.rb:12:in `each'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/spec_set.rb:12:in `each'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/installer.rb:49:in `run'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/installer.rb:8:in `install'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/cli.rb:222:in `install'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/vendor/thor/task.rb:22:in `send'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/vendor/thor/task.rb:22:in `run'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/vendor/thor/invocation.rb:118:in `invoke_task'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/vendor/thor.rb:246:in `dispatch'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/lib/bundler/vendor/thor/base.rb:389:in `start'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.15/bin/bundle:13
    from /usr/bin/bundle:19:in `load'
    from /usr/bin/bundle:19

解决方法

尝试添加

gem 'therubyracer','0.11.0beta5'
gem 'libv8','~> 3.11.8'

到您的Gemfile.这对我有帮助.