无法在Mountain Lion上安装pg gem

Question

升级到Mountain Lion后,我遇到了很多关于Rails的麻烦.

到目前为止,我试图解决这些问题并在互联网上搜索几个小时我已经做了以下工作以确保我的系统在升级后具有运行rails的所有依赖关系:

1. 我更新了我的Homebrew安装
2. 我更新了我的RVM安装
3. 我安装了XCode命令行工具
4. 我按照提到安装了GCC
5. 我将我的Ruby版本升级为

   ruby 1.9.2p290(2011-07-09修订版32553)[x86_64-darwin10.8.0]

6. 我的Rails版本被验证为Rails 3.2.6

7. 我还发现Mountain Lion与Postgres有一些问题,所以我看到这篇文章,发现我需要将这一行添加到我的Bash配置文件中:

   export PATH="/usr/local/bin:/usr/bin:$PATH"
   

现在我转到我升级之前在Snow Leopard上运行正常的Rails应用程序,当我rails s在命令行运行时出现以下错误:

AM@~/Documents/RailsWS/app0815 >gem install pg
 Building native extensions.  This could take a while...
 ERROR:  Error installing pg:
 ERROR: Failed to build gem native extension.
 /Users/AM/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb
 checking for pg_config... yes
 Using config values from /usr/bin/pg_config
 checking for libpq-fe.h... *** 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/AM/.rvm/rubies/ruby-1.9.2-p290/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
 /Users/AM/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': 
 The complier failed to generate an executable file. (RuntimeError)
 You have to install development tools first.
from /Users/AM/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:452:in `try_cpp'
from /Users/AM/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:853:in `block in   find_header'
from /Users/AM/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:693:in `block in checking_for'
from /Users/AM/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:280:in `block (2  levels) in postpone'
from /Users/AM/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:254:in `open'
from /Users/AM/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:280:in `block in postpone'
from /Users/AM/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:254:in `open'
from /Users/AM/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:276:in `postpone'
from /Users/AM/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:692:in `checking_for'
from /Users/AM/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/mkmf.rb:852:in `find_header'
from extconf.rb:41:in `<main>'


 Gem files will remain installed in /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/pg-0.14.1 for inspection.
 Results logged to /Users/AM/.rvm/gems/ruby-1.9.2-p290/gems/pg-0.14.1/ext/gem_make.out

当我转到Rails应用程序并尝试bundle install在pg安装时失败.

Answer 1

从http://www.enterprisedb.com/products-services-training/pgdownload#osx下载postgresSQL安装程序

然后让你的路径看起来像这样:

PATH=$PATH:/Library/PostgreSQL/9.0/bin/ gem install pg

这样做!

注意:请在路径中正确指定postgreSQL安装版本.

更新(2015年11月10日)(取自Heroku)

在OS X上使用Homebrew:

1. 使用以下命令安装postgresql:

   brew install postgresql

2. 然后使用以下命令安装gem:

   gem install pg -- --with-pg-config=/usr/local/bin/pg_config

在OS X上使用MacPorts:

gem install pg -- --with-pg-config=/opt/local/lib/postgresql84/bin/pg_config

希望这可以帮助!

Answer 2

正如banditKing在他的回答中所说,需要告诉宝石在哪里找到postgres二进制文件.您可以使用Heroku(http://postgresapp.com)中优秀且简单的postgres.app附带的二进制文件来安装此gem而不是EnterpriseDb版本.EnterpriseDB版本很棒,但是涉及到dev机器的安装.

在您的系统上下载Postgres.app并将内部bin目录添加到您的路径中.我把它放进去/Applications/Postgres.app,所以我用过

gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/MacOS/bin/pg_config

在10.8.2,Ruby 1.9.3,pg-0.14.1和XCode CLI工具上为我工作