Question

我最近尝试将我的rails 3.2 *应用程序升级到rails 4.2。*。但是，我在安装'pg' gem时被拦截了。当我用Google搜索时，解决方案主要与OSX相关。但我正在使用ubuntu 14.04。需要针对以下问题提出任何建议。

我在我的计算机上安装了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.

Answer 1

您需要安装带有PostgreSQL标头的postgreSQL开发包

sudo apt-get install libpq-dev

您也可以尝试

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

Answer 2

在ubuntu 14.04上使用postgresql 9.4尝试gem install pg -v 0.18.1时遇到这个问题

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

基本上我错过了postgresql-server-dev-${version}

在你的情况下试试

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

Answer 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

rails 4.2.0：无法在ubuntu 14.04上安装pg gem

3 个答案: