安装pg gem时找不到'libpq-fe.h头文件

我使用的是Ruby on Rails 3.1预版本。我喜欢使用PostgreSQL，但问题是安装pg gem。它给了我以下错误:

$ gem install pg
Building native extensions.  This could take a while...
ERROR:  Error installing pg:
    ERROR: Failed to build gem native extension.

        /home/u/.rvm/rubies/ruby-1.9.2-p0/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=/home/u/.rvm/rubies/ruby-1.9.2-p0/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 /home/u/.rvm/gems/ruby-1.9.2-p0/gems/pg-0.11.0 for inspection.
    Results logged to /home/u/.rvm/gems/ruby-1.9.2-p0/gems/pg-0.11.0/ext/gem_make.out

我怎么解决这个问题?

当前回答

在macOS(以前的Mac OS X和OS X)上，使用Homebrew安装正确的头文件:

brew install postgresql

然后运行

gem install pg

应该工作。

或者，不安装整个postgresql，你可以酿造安装libpq并导出正确的PATH和PKG_CONFIG_PATH，如“警告”部分所述

2013-12-09 22:30:51

其他回答

在Mac OS X上运行如下:

gem install pg -- --with-pg-config=***/path/to/pg_config***

***/path/to/pg_config***是pg_config的路径

2014-01-08 09:36:16

在Mac上，我用下面的代码解决了这个问题:

gem install pg -v '0.18.4' -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.4/bin/pg_config

2016-02-04 21:00:51

在Ubuntu 20.04上，我已经有libpq5:amd64 version 13.2-1.pgdg20.04+1。现在，当我试图从apt存储库安装libpq-dev时，我正在接收

The following packages have unmet dependencies:
libpq-dev : Depends: libpq5 (= 12.6-0ubuntu0.20.04.1) but 13.2-1.pgdg20.04+1 is to be installed

我从http://ftp.us.debian.org/debian/pool/main/p/postgresql-13/libpq-dev_13.2-1_amd64.deb上获取了deb，并做了以下工作:

mkdir -p /tmp/libpq-dev
dpkg-deb -R libpq-dev_13.2-1_amd64.deb /tmp/libpq-dev
sed -i 's|= 13.2-1|= 13.2-1.pgdg20.04+1|' /tmp/libpq-dev/DEBIAN/control
dpkg-deb -b /tmp/libpq-dev /tmp/libpq-dev-new.deb
sudo dpkg -i /tmp/libpq-dev-new.deb

从那以后，我一直在愉快地使用宝石。没有额外的安装或任何东西。

2021-03-12 14:34:46

我也遇到过类似的问题，这个方法帮我解决了问题:

gem install do_postgres -- --with-pgsql-server-dir=/Applications/Postgres.app/Contents/MacOS --with-pgsql-server-include=/Applications/Postgres.app/Contents/MacOS/include/server

来源:

https://gist.github.com/oisin/6562181

2014-02-07 02:27:57

我找到了这个答案，这是唯一一个对我有用的(Mac OS)——在研究了大约两天之后:

$ sudo su

$ env ARCHFLAGS="-arch x86_64" gem install pg

Building native extensions.  This could take a while...
Successfully installed pg-0.11.0
1 gem installed
Installing ri documentation for pg-0.11.0...
Installing RDoc documentation for pg-0.11.0...

参见堆栈溢出问题无法找到PostgreSQL客户端库(libpq)。

2014-10-20 16:21:36

安装pg gem时找不到'libpq-fe.h头文件

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