ruby-on-rails - 运行 'pg gem' 时出现 'bundle install' 安装错误

Question

我在运行“bundle 安装”时突然遇到了这个问题。一切似乎都安装正确，但后来我遇到了“pg”的问题，就像其他许多人一样。如消息所述，我尝试运行“gem install pg - '0.12.2'”但它仍然失败。

我在 Snow Leopard 10.6 上，这是我遇到的错误:

Installing pg (0.12.2) with native extensions 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /Users/thomaskim/.rvm/rubies/ruby-1.9.3-p327/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/thomaskim/.rvm/rubies/ruby-1.9.3-p327/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/thomaskim/.bundler/tmp/1336/gems/pg-0.12.2 for inspection.
Results logged to /Users/thomaskim/.bundler/tmp/1336/gems/pg-0.12.2/ext/gem_make.out
An error occurred while installing pg (0.12.2), and Bundler cannot continue.
Make sure that `gem install pg -v '0.12.2'` succeeds before bundling.

Answer 1

首先，您需要确保安装了命令行工具(Xcode 包)。由于您使用的是旧版本的 OSX - 您将不得不研究如何做到这一点。

然后，使用 homebrew 安装 postgress

brew install postgres 

在那之后，一切都应该毫无问题地 bundle 在一起。