ruby - therubyracer-Gem::Ext::BuildError:错误:无法构建gem native 扩展

我正在尝试在Mavericks上安装以下gem版本

  • libv8(3.16.14.3)
  • therubyracer(0.12.1)

  • 显然,therubyracer gem 依赖于libv8。

    1)安装libv8

    什么是libv8?我的研究似乎表明它是Google Chrome使用的某种javascript库?

    我在安装它时遇到了麻烦,但是 this great post既有我的错误,也有关于如何绕过它的解释清楚的答案。

    所以我用安装了 libv8
    gem install libv8 -- --with-system-v8
    

    据我了解,这安装了gem,但是使用了v8库的本地系统安装,而不是... gem随附的版本?无论哪种方式,它都是成功的。

    2)安装rubyracer

    在下一步中,我无法安装 therubyracer gem。我不太确定这个gem的作用,只是我尝试使用 bundle install的Rails项目的依赖项。

    它给了我以下错误:
    Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
    
        /Users/jeeves.butler/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb 
    checking for main() in -lpthread... yes
    checking for main() in -lobjc... yes
    checking for v8.h... no
    *** 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/jeeves.butler/.rvm/rubies/ruby-1.9.2-p290/bin/ruby
        --with-pthreadlib
        --without-pthreadlib
        --with-objclib
        --without-objclib
        --enable-debug
        --disable-debug
        --with-v8-dir
        --without-v8-dir
        --with-v8-include
        --without-v8-include=${v8-dir}/include
        --with-v8-lib
        --without-v8-lib=${v8-dir}/lib
    /Users/jeeves.butler/.rvm/gems/ruby-1.9.2-p290/gems/libv8-3.16.14.3/ext/libv8/location.rb:50:in 
    'configure': You have chosen to use the version of V8 found 
    on your system (Libv8::Location::System::NotFoundError)
    and *not* the one that is bundled with the libv8 rubygem. However,
    it could not be located. please make sure you have a version of
    v8 that is compatible with 3.16.14.3 installed. You may
    need to special --with-v8-dir options if it is in a non-standard
    location
    
    thanks,
    The Mgmt
    
        from /Users/jeeves.butler/.rvm/gems/ruby-1.9.2-p290/gems/libv8-3.16.14.3/lib/libv8.rb:7:in `configure_makefile'
        from extconf.rb:32:in `<main>'
    
    extconf failed, exit code 1
    
    Gem files will remain installed in /Users/jeeves.butler/.rvm/gems/ruby-1.9.2-p290/gems/therubyracer-0.12.1 for inspection.
    Results logged to /Users/jeeves.butler/.rvm/gems/ruby-1.9.2-p290/extensions/x86_64-darwin-13/1.9.1/therubyracer-0.12.1/gem_make.out
    

    据我所知,我选择使用本地V8库而不是 libv8提供的库来安装 libv8,但是现在找不到本地安装。
  • 如何检查是否确实安装了V8,以及如何找到它?
  • 我尝试了一些指定的标志,它们似乎都没有将gem指向正确的安装目录
  • 这可能是一个单独的主题,但是extconf.rb是什么?我已经在几个地方看到过。具体来说,它与gcc编译器有什么关系?

  • 谢谢!!

    编辑:
  • 我尝试了this solution来卸载libv8并通过brew install重新安装。在几个类似的问题中也提到了它。没运气。
  • 我还尝试了here所描述的CCCXXCPP环境变量,尽管我认为这没有任何作用,因为它已经在使用我的gcc v4.6编译器。
  • 最佳答案

    这一步对我有用。

    操作系统:Maverick
    ruby :2.1.1

    gem uninstall libv8
    gem install therubyracer -v '0.11.3'
    gem install libv8 -v '3.11.8.13' -- --with-system-v8