Ruby-on-rails Rails 3 - 无法安装 pg gem
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Rails 3 - can't install pg gem
提问by user984621
When I try to run bundle (bundle install), I all the time get
当我尝试运行捆绑包（捆绑安装）时，我总是得到
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.
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?
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？
采纳答案by Ethan
As stated in your error log you need to pass in the path to the pg_config. Try to install the gem using:
正如您的错误日志中所述，您需要将路径传递给 pg_config。尝试使用以下方法安装 gem：
gem install pg -- --with-pg-config= 'PATH_TO_YOUR_PG_CONFIG'
If you are not sure where your pg_config is, and assuming you are on Linux or Mac, you can run the following command:
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：
which pg_config
Your pg-config can be in different locations depending on how you installed postgres.
根据您安装 postgres 的方式，您的 pg-config 可以位于不同的位置。
回答by E.E.33
if you are running on Linux you may be interested in what worked for me:
如果您在 Linux 上运行，您可能会对对我有用的内容感兴趣：
sudo apt-get install postgresql
sudo apt-get install libpq-dev
Then
然后
gem install pg
then
然后
bundle install
src: http://wikimatze.de/installing-postgresql-gem-under-ubuntu-and-mac
源代码：http: //wikimatze.de/installing-postgresql-gem-under-ubuntu-and-mac
回答by Ari
If you're using Postgress.appthen youll want access to its command-line tools. Enter the following line in your terminal or your PATH profile:
如果您使用Postgress.app，那么您将需要访问其命令行工具。在终端或PATH 配置文件中输入以下行：
PATH="/Applications/Postgres.app/Contents/MacOS/bin:$PATH"
gem install pgshould now work. (This is what worked for me.)
gem install pg现在应该可以工作了。（这对我有用。）
NoteNew versions path looks like:
注意新版本路径如下所示：
/Applications/Postgres.app/Contents/Versions/<version>/bin
回答by user2373148
If you have homebrew, just type:
如果你有自制软件，只需输入：
$ brew install postgresql
$ brew 安装 postgresql
If you dont have it, download typing this in your terminal:
如果没有，请在终端中输入以下内容下载：
ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"
ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"
回答by jlucasps
Search for libpq:
搜索 libpq：
brew search libpq
Should output libpqxx
应该输出 libpqxx
Then try install it:
然后尝试安装它：
brew install libpqxx
回答by Travis Reeder
You only need to install libpq-dev:
您只需要安装libpq-dev：
sudo apt-get install libpq-dev
Then the gem should install just fine.
然后 gem 应该安装得很好。
回答by CGK
Follow the post-installation instructions: http://postgresapp.com/documentation/configuration-ruby.html
按照安装后说明进行操作：http: //postgresapp.com/documentation/configuration-ruby.html
To install the pg gem, make sure you have set up your $PATH correctly (as specified in http://postgresapp.com/documentation/cli-tools.html), then run
要安装 pg gem，请确保您已正确设置 $PATH（如http://postgresapp.com/documentation/cli-tools.html 中所述），然后运行
sudo ARCHFLAGS="-arch x86_64" gem install pg
sudo ARCHFLAGS="-arch x86_64" gem install pg
I stronglyrecommend reading both pages. Just skimmed them and lost 1 hour of my life. Read them, problem solved.
我强烈建议阅读这两页。只是略读它们，就失去了我生命中的 1 小时。阅读它们，问题解决了。
回答by Trang Tung Nguyen
I got the same issue but my Postgres was install in
我遇到了同样的问题，但我的 Postgres 安装在
/Library/PostgreSQL/9.3
/Library/PostgreSQL/9.3
Updated the ~/.bash_profile by adding:
通过添加更新 ~/.bash_profile ：
export PATH=/Library/PostgreSQL/9.3/bin:$PATH
Open a new terminal, run bundle updateand also it worked for me. Thanks Ari.
打开一个新终端，运行bundle update它也对我有用。谢谢阿里。
回答by dfrankow
The problem I had was that for some reason it was trying to compile with /usr/bin/gcc-4.2. I found that out by changing try_cpp in mkmf.rb (which I saw in the stack trace) to raise an exception with the compile line that was failing.
我遇到的问题是由于某种原因它试图用 /usr/bin/gcc-4.2 编译。我通过更改 mkmf.rb（我在堆栈跟踪中看到的）中的 try_cpp 来引发一个异常，编译行失败了。
I soft-linked gcc to gcc-4.2 and it worked:
我将 gcc 软链接到 gcc-4.2 并且它起作用了：
sudo ln -s /usr/bin/gcc /usr/bin/gcc-4.2
Why was it trying to use gcc-4.2? No idea.
为什么要尝试使用 gcc-4.2？不知道。
The actual compile line:
实际编译行：
/usr/bin/gcc-4.2 -E -I/Users/dfrankow/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1/x86_64-darwin11.4.0 -I/Users/dfrankow/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1/ruby/backward -I/Users/dfrankow/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -I/usr/local/Cellar/postgresql/9.1.4/include -O3 -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wshorten-64-to-32 -Wimplicit-function-declaration -fno-common -pipe conftest.c -o conftest.i (RuntimeError)
回答by Konstantin Kalbazov
You can set a build config option bundle config build.pg --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.3/bin/pg_configand use gem install pgwithout any options (the path to pg_config may be different for you, this one is for the Postgresapp 9.3.5.0)
您可以设置一个构建配置选项bundle config build.pg --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.3/bin/pg_config并在gem install pg没有任何选项的情况下使用（pg_config 的路径对您来说可能不同，这个是用于 Postgresapp 9.3.5.0）
