安装pg(0.17.1)时发生错误，而Bundler不能继续。

I just installed Rails 4.0.2 and when creating a new app, in the bundle stage I get:

我刚安装了Rails 4.0.2，当我创建一个新的应用时，在bundle阶段我得到:

Installing pg (0.17.1) 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/Users/Dee/.rvm/rubies/ruby-2.0.0-p247/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.

How do I fix this?

我怎么解决这个问题?

13 个解决方案

#1

I'm on a Mac running Mavericks. My solution was to install Postgres.

我在Mac电脑上跑小牛队。我的解决方案是安装Postgres。

And then in terminal install using homebrew with the configuration:

然后在终端安装中使用homebrew配置:

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

Note: This answer has been edited to use the latest symlink that is currently included in shipping versions of the Postgres app.

注意:此答案已经过编辑，以使用当前在Postgres应用程序的shipping版本中包含的最新symlink。

Previous versions suggested:

以前的版本,建议:

gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.4/bin/pg_config

#2

Some kind of error resported here Installing PG gem on OS X - failure to build native extension

在OS X上安装PG gem时出现了一些错误，无法构建本机扩展。

To install dependencies on Ubuntu try this:

要在Ubuntu上安装依赖项，请尝试:

sudo apt-get install libpq-dev

and this

这

gem install pg

#3

app root:

应用程序根:

1. brew update
2. 酿造更新
3. brew install postgres
4. 酿造安装postgres
5. gem install pg -- --with-pg-config=/usr/local/Cellar/postgresql/9.3.4/bin/pg_config
6. gem安装pg -- -配置=/usr/本地/地下室/postgresql/9.3.4/bin/pg_config。
7. bundle install
8. 包安装
9. ln -sfv /usr/local/opt/postgresql/*.plist ~/Library/LaunchAgents
10. ln -sfv /usr/local/opt/postgresql/*.plist ~ /图书馆/ LaunchAgents
11. launchctl load ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist
12. ~ /图书馆/ LaunchAgents / homebrew.mxcl.postgresql.plist launchctl负载
13. createuser -s -r postgres
14. createuser - s - r postgres
15. rake db:create:all
16. rake db:创建:所有
17. rake db:migrate
18. rake db:migrate
19. rails s
20. rails的年代

NOTE: replace the version number in step 3 if needed.

注意:如果需要，请在步骤3中替换版本号。

#4

Previously working answer with older version

I installed under mac OSX Mavericks, having the postgres app (Version 9.2.2.0 ) from www.postgresapp.com installed. The underlying problem was simpy that the since postgres was installed via the app, the configuration file resides on a location which is not the default one when installing it without postgressapp. so we need to tell gem where to find this file by:

我安装在mac OSX Mavericks下，从www.postgresapp.com安装了postgres应用程序(9.2.2.0版)。潜在的问题是simpy，因为postgres是通过应用程序安装的，配置文件驻留在一个位置上，在安装它时没有postgressapp，这不是默认的。所以我们需要告诉gem在哪里找到这个文件:

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

gem安装pg -- -配置=/ application /Postgres.app/Contents/MacOS/bin/pg_config。

Hope it helps

希望它能帮助

#5

If gem install pg fails, try the following command:

如果gem安装pg失败，请尝试以下命令:

env ARCHFLAGS="-arch x86_64" gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/MacOS/bin/pg_config

... from the PostgreSQL.app Documentation

…PostgreSQL。应用程序文档

#6

Looks like you do not have PostgreSQL installed. The pg gem requires some headers from PostgreSQL to compile native extension.

看起来您没有安装PostgreSQL。pg gem需要一些来自PostgreSQL的头文件来编译原生扩展。

#7

I had to combine everything and use

我必须把所有的东西结合起来使用。

sudo env ARCHFLAGS="-arch x86_64" gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.4/bin/pg_config

#8

If you are using something other than Postgres in development and Postgres in production only, you can add the pg gem to your gemfile like so...

如果您使用的是开发中的Postgres和仅生产的Postgres，那么您可以将pg gem添加到gemfile中，这样…

group :production do
  gem 'pg',             '0.17.1'
end

Then use bundle install --without production

然后使用捆绑包安装——不需要生产。

#9

After installing Postgres I had to run the following command

安装Postgres后，我必须运行以下命令。

env ARCHFLAGS="-arch x86_64" gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.3/bin/pg_config

After this bundle install works great!

在这个bundle安装之后，效果很好!

Hope it helps

希望它能帮助

#10

The way I managed to get past that error was:

我设法克服这个错误的方法是:

• cd to app folder and then set the ruby version locally. I'm using ruby 2.1.2.
• cd到app文件夹，然后在本地设置ruby版本。我使用ruby 2.1.2。

rbenv local 2.1.2

rbenv当地2.1.2

• instead of just running bundle install, install the gems in vendor/bundle
• 不要只运行bundle安装，而是在供应商/bundle中安装gem。

bundle install --path vendor/bundle

包安装——路径供应商/包

This did it for me.

这是为我做的。

#11

I needed to use sudo

我需要用sudo。

sudo gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.5/bin/pg_config

#12

For CentOS users:

CentOS的用户:

sudo yum install postgresql-devel

and

和

gem install pg

#13

It works for me

它适合我

rvm list gemsets
rvm use ruby-2.4.1
bundle

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