Question

运行'bundle install'时我突然遇到这个问题。一切似乎都正确安装，但后来我遇到了'pg'的问题，正如许多其他人似乎做的那样。正如消息所说，我尝试运行'gem install pg - '0.12.2''，但它仍然失败。

我在雪豹10.6上，这是我得到的错误：

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OSX，因此您必须研究如何做到这一点。

比，使用自制安装postgress

brew install postgres

在那之后，一切都应该捆绑没有问题。

Answer 2

您似乎没有正确安装postgres。当我尝试使用npm安装pg模块时，我遇到了类似的错误。正确安装postgres后它消失了。这是下载链接：http://www.postgresql.org/download/macosx/

Answer 3

如果仅在开机模式下在机器上运行rails并使用sql lite，则无需安装生产包。

所以如果你的gemfile像这样：

group :production do
  gem 'pg'
end

尝试使用以下命令安装软件包：

gem install --without production

运行'bundle install'时'pg gem'安装出错

3 个答案: