Ruby on rails 为什么在安装gem'；pg'；？

可能重复：

我正在尝试将gempg添加到本地环境中。
但是它返回这个错误

Errno::EACCES: Permission denied - /Users/me/.rvm/gems/ruby-1.9.3-p362/gems/pg-0.14.1/.gemtest
An error occurred while installing pg (0.14.1), and Bundler cannot continue.
Make sure that `gem install pg -v '0.14.1'` succeeds before bundling.

Installing pg (0.14.1) with native extensions 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /Users/me/.rvm/rubies/ruby-1.9.3-p362/bin/ruby extconf.rb 
checking for pg_config... no
No pg_config... trying anyway. If building fails, please try again with
 --with-pg-config=/path/to/pg_config
checking for libpq-fe.h... no
Can't find the 'libpq-fe.h header
*** 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/me/.rvm/rubies/ruby-1.9.3-p362/bin/ruby
    --with-pg
    --without-pg
    --with-pg-dir
    --without-pg-dir
    --with-pg-include
    --without-pg-include=${pg-dir}/include
    --with-pg-lib
    --without-pg-lib=${pg-dir}/lib
    --with-pg-config
    --without-pg-config
    --with-pg_config
    --without-pg_config


Gem files will remain installed in /Users/me/.rvm/gems/ruby-1.9.3-p362/gems/pg-0.14.1 for inspection.
Results logged to /Users/me/.rvm/gems/ruby-1.9.3-p362/gems/pg-0.14.1/ext/gem_make.out
An error occurred while installing pg (0.14.1), and Bundler cannot continue.
Make sure that `gem install pg -v '0.14.1'` succeeds before bundling.

我该怎么办

在该错误消失后，现在返回该错误

Errno::EACCES: Permission denied - /Users/me/.rvm/gems/ruby-1.9.3-p362/gems/pg-0.14.1/.gemtest
An error occurred while installing pg (0.14.1), and Bundler cannot continue.
Make sure that `gem install pg -v '0.14.1'` succeeds before bundling.

Installing pg (0.14.1) with native extensions 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /Users/me/.rvm/rubies/ruby-1.9.3-p362/bin/ruby extconf.rb 
checking for pg_config... no
No pg_config... trying anyway. If building fails, please try again with
 --with-pg-config=/path/to/pg_config
checking for libpq-fe.h... no
Can't find the 'libpq-fe.h header
*** 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/me/.rvm/rubies/ruby-1.9.3-p362/bin/ruby
    --with-pg
    --without-pg
    --with-pg-dir
    --without-pg-dir
    --with-pg-include
    --without-pg-include=${pg-dir}/include
    --with-pg-lib
    --without-pg-lib=${pg-dir}/lib
    --with-pg-config
    --without-pg-config
    --with-pg_config
    --without-pg_config


Gem files will remain installed in /Users/me/.rvm/gems/ruby-1.9.3-p362/gems/pg-0.14.1 for inspection.
Results logged to /Users/me/.rvm/gems/ruby-1.9.3-p362/gems/pg-0.14.1/ext/gem_make.out
An error occurred while installing pg (0.14.1), and Bundler cannot continue.
Make sure that `gem install pg -v '0.14.1'` succeeds before bundling.

---

看起来像是有人试图在过去安装sudo。我会检查该目录的权限，如果文件看起来有误，我会检查这些文件。

我相信你之前在和sudo鬼混
试一试

---

是的，我做了很多事情，但我不记得我做了什么：（我应该为chown执行什么命令行？请帮助Sudo chown-R youruser:yourgroup~/.rvm/gems/ruby-1.9.3-p362/gems/pg-0.14.1/谢谢。它返回chown:yourgroup:Invalid Arguments用用户名和组名替换youruser和yourgroup…非常感谢。现在它返回不同的错误：（谢谢！但返回错误：（MacBook Pro:me$chown-R

whoami

：

whoami

~/.rvm/gems/ruby-1.9.3-p362/gems chown:me:Invalid arguments刚意识到你在使用osx.edited。现在，在我安装了gem之后，一切看起来都很好--with pg config=/opt/local/lib/postgresql910/bin/pg\u config Thankshow你安装了postgresql吗？