Question

试图安装pg gem我得到了下一个错误：

alex@ubuntu:~/RubymineProjects/Tiger Skills$ gem install pg
ERROR:  While executing gem ... (Gem::FilePermissionError)
You don't have write permissions into the /var/lib/gems/1.9.1 directory.
alex@ubuntu:~/RubymineProjects/Tiger Skills$ sudo gem install pg
Building native extensions.  This could take a while...
ERROR:  Error installing pg:
    ERROR: Failed to build gem native extension.

    /usr/bin/ruby1.9.1 extconf.rb
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError)
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from extconf.rb:2:in `<main>'


Gem files will remain installed in /var/lib/gems/1.9.1/gems/pg-0.15.1 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/pg-0.15.1/ext/gem_make.out

gem_make.out文件：

/usr/bin/ruby1.9.1 extconf.rb
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError)
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from extconf.rb:2:in `<main>'

已经尝试使用

解决

$ sudo apt-get install postgresql-client libpq5 libpq-dev

然后：

$ sudo gem install pg

Answer 1

那是因为您没有为目录设置写入权限，请尝试：

   chmod +777 /var/lib/gems/1.9.1

Answer 2

这有助于我：

sudo apt-get install rails

Answer 3

您需要安装Ruby包的-dev部分。类似的东西：

sudo apt-get install ruby1.9-dev

应该为您提供编译二进制扩展所需的Ruby部分。

祝你好运！

Answer 4

我遇到了几乎相同的问题我用它来解决它。

$rvmsudo gem install pg

Rails 3，安装pg gem时出错

4 个答案: