Rails 3 - 无法安装 pg gem [英] Rails 3 - can't install pg gem

问题描述

当我尝试运行 bundle(捆绑安装)时，我总是得到

When I try to run bundle (bundle install), I all the time get

Installing pg (0.13.2) with native extensions 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /Users/ryan/.rvm/rubies/ruby-1.9.2-p290/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
    --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=/Users/ryan/.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


Gem files will remain installed in /Users/ryan/.rvm/gems/ruby-1.9.2-p290/gems/pg-0.13.2 for inspection.
Results logged to /Users/ryan/.rvm/gems/ruby-1.9.2-p290/gems/pg-0.13.2/ext/gem_make.out
An error occured while installing pg (0.13.2), and Bundler cannot continue.
Make sure that `gem install pg -v '0.13.2'` succeeds before bundling.

我使用 Mac OS X 10.6，安装的 PostgreSQL 版本是 9.1.我发现问题出在 libpq-dev 中，我该如何安装/修复它?

I use Mac OS X 10.6, the version of installed PostgreSQL is 9.1. I found the problem is in the libpq-dev, how could I install/fix that?

推荐答案

如错误日志中所述，您需要将路径传递到 pg_config.xml 文件中.尝试使用以下方法安装 gem:

As stated in your error log you need to pass in the path to the pg_config. Try to install the gem using:

gem install pg -- --with-pg-config= 'PATH_TO_YOUR_PG_CONFIG'

如果您不确定 pg_config 在哪里，并且假设您使用的是 Linux 或 Mac，则可以运行以下命令:

If you are not sure where your pg_config is, and assuming you are on Linux or Mac, you can run the following command:

which pg_config

根据您安装 postgres 的方式，您的 pg-config 可以位于不同的位置.

Your pg-config can be in different locations depending on how you installed postgres.

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