Ruby on rails &引用；错误：未能生成gem本机扩展。"；安装导轨时

我正在尝试安装Rails。我安装了RVM，然后通过它安装了最新的Ruby版本（它可以正常工作），但是安装Rails失败了：

serge1peshcoff@myLaptop:~$ gem install rails
Building native extensions.  This could take a while...
/home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/ext/builder.rb:73: warning: Insecure world writable dir /allext/soft_without_install in PATH, mode 040777
ERROR:  Error installing rails:
    ERROR: Failed to build gem native extension.

    /home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/bin/ruby -r ./siteconf20150911-21759-1c3q6e9.rb extconf.rb
checking if the C compiler accepts ... yes
Building nokogiri using packaged libraries.
*** 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=/home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/bin/$(RUBY_BASE_NAME)
    --help
    --clean
    --use-system-libraries
/home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': /home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/x86_64-linux/digest/md5.so: undefined symbol: rb_Digest_MD5_Init - /home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/x86_64-linux/digest/md5.so (LoadError)
    from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /home/serge1peshcoff/.rvm/gems/ruby-2.2.1/gems/mini_portile-0.6.2/lib/mini_portile.rb:7:in `<top (required)>'
    from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:128:in `require'
    from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:128:in `rescue in require'
    from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:39:in `require'
    from extconf.rb:395:in `<main>'

extconf failed, exit code 1

Gem files will remain installed in /home/serge1peshcoff/.rvm/gems/ruby-2.2.1/gems/nokogiri-1.6.6.2 for inspection.
Results logged to /home/serge1peshcoff/.rvm/gems/ruby-2.2.1/extensions/x86_64-linux/2.2.0/nokogiri-1.6.6.2/gem_make.out

---

这与报告的

nokogiri

问题有关

---

编译它需要一些额外的linux库。

我通过运行

gem install nokogiri安装了
nokogiri
——使用系统库
，然后
gem install rails
，一切都很好，然后我启动了rails，我遇到了关于“未定义符号：rb_Digest_MD5_Init”的错误（与安装时相同），即使我在没有argumentshow的情况下运行它，也会显示此答案：“在发布此问题之前尝试过：我的存储库中没有
libreadline5 dev
（虽然我已经安装了替换包，但我安装了其中一个），而且我还尝试重新安装
libssl dev
（我了解到这可能是个问题）我仍然有同样的结果。你介意在你的问题中添加更多关于你现在得到的问题的信息吗
nokogiri
问题已经解决了？我不清楚你将执行什么以及显示什么错误…我解决了它：
serge1peshcoff@myLaptop:/all/Documents/Programming/rails$ rails
/home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/x86_64-linux/digest/md5.so: undefined symbol: rb_Digest_MD5_Init - /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/x86_64-linux/digest/md5.so (LoadError)
    from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/gems/railties-4.2.4/lib/rails/generators/app_base.rb:1:in `<top (required)>'
    from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/gems/railties-4.2.4/lib/rails/generators/rails/app/app_generator.rb:1:in `<top (required)>'
    from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/gems/railties-4.2.4/lib/rails/commands/application.rb:2:in `<top (required)>'
    from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/gems/railties-4.2.4/lib/rails/cli.rb:14:in `<top (required)>'
    from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/gems/railties-4.2.4/bin/rails:9:in `<top (required)>'
    from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/bin/rails:23:in `load'
    from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/bin/rails:23:in `<main>'
    from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/bin/ruby_executable_hooks:15:in `eval'
    from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/bin/ruby_executable_hooks:15:in `<main>'