Ruby on rails 4 rails 4.2.0:can'；在ubuntu 14.04上安装pg gem

我最近尝试将我的rail 3.2*应用程序升级到rails 4.2.*。但是，我在安装

'pg'

gem时被阻止了。当我在谷歌上搜索时，这些解决方案大多只与OSX相关。但我使用的是ubuntu 14.04。需要任何关于以下问题的建议

我已经在我的机器上安装了

postgresql 9.3.5

版本

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /usr/local/rvm/rubies/ruby-2.1.2/bin/ruby extconf.rb 
checking for pg_config... yes
Using config values from /usr/bin/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=/usr/local/rvm/rubies/ruby-2.1.2/bin/ruby
    --with-pg
    --without-pg
    --enable-windows-cross
    --disable-windows-cross
    --with-pg-config
    --without-pg-config
    --with-pg_config
    --without-pg_config
    --with-pg-dir
    --without-pg-dir
    --with-pg-include
    --without-pg-include=${pg-dir}/include
    --with-pg-lib
    --without-pg-lib=${pg-dir}/lib

extconf failed, exit code 1

Gem files will remain installed in /usr/local/rvm/gems/ruby-2.1.2@r4/gems/pg-0.18.1 for inspection.
Results logged to /usr/local/rvm/gems/ruby-2.1.2@r4/extensions/x86_64-linux/2.1.0/pg-0.18.1/gem_make.out
An error occurred while installing pg (0.18.1), and Bundler cannot continue.
Make sure that `gem install pg -v '0.18.1'` succeeds before bundling.

---

您需要安装头为postgreSQL的postgreSQL开发包

sudo apt-get install libpq-dev

你也可以试试

sudo apt-get install postgresql-client
sudo apt-get install postgresql postgresql-contrib

---

在ubuntu 14.04上用postgresql 9.4安装pg-v 0.18.1时遇到了这个问题

sudo apt-get install libpq-dev build-essential postgresql-server-dev-9.4

基本上我缺少

postgresql server开发-${version}

在你的情况下，试试看

sudo apt-get install libpq-dev build-essential postgresql-server-dev-9.3

---

在ubuntu 16.04上执行此命令

sudo apt install libpq-dev postgresql-server
sudo -u postgres createuser -s $(whoami); createdb $(whoami)
gem install pg

---

我已经安装了那些依赖软件包。但是，我又一次失败了。你看过sudo apt get install postgresql postgresql contrib吗，这可能对你有用是的，我已经在SF中查看了给定的链接和其他链接。但无论如何，这对我都没有帮助。第一个例子在我们的Ubuntu 14.04服务器上对我非常有用，谢谢。@black先生请查看我的答案并接受它作为正确答案谢谢！顺便说一句，sudo apt get install libpq dev对我来说已经足够了。我已经为此绞尽脑汁好几天了，直到安装了

build-essential

软件包（对于

gem pg 0.21

）之前，一切都无济于事。。我在其他地方都没看到，所以谢谢你！尽管刚刚尝试了

apt-get-install-libpq-dev-gcc-make

而不是完整的

build-sential

，但效果也不错