使用'gem pq'安装PostgreSQL gem失败，并显示错误：无法构建gem本机扩展 [英] Installing the PostgreSQL gem with 'gem pq' fails with ERROR: Failed to build gem native extension
问题描述
我正在学习Ruby on Rails并试图开发一个应用程序。
在我的应用程序中，我试图在开发模式和 PostgreSQL中使用生产模式中的默认 SQLite数据库。
但是在尝试安装pg gem时出现以下错误： gem install pg
I am learning Ruby on Rails and trying to develop an application.
In my application I am trying to use the default SQLite database in the Development Mode and PostgreSQL in the Production Mode.
But I'm getting the following error while trying to install pg gem using: gem install pg
Building native extensions. This could take a while...
ERROR: Error installing pg:
ERROR: Failed to build gem native extension.
/home/tusharkhatiwada/.rvm/rubies/ruby-2.0.0-p247/bin/ruby extconf.rb
checking for pg_config... yes
Using config values from /usr/bin/pg_config
You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev
for building a client-side application.
You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev
for building a client-side application.
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/tusharkhatiwada/.rvm/rubies/ruby-2.0.0-p247/bin/ruby
--with-pg
--without-pg
--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}/
Gem files will remain installed in /home/tusharkhatiwada/.rvm/gems/ruby-2.0.0-p247@rails4.0.0/g
ems/pg-0.17.0 for inspection.
Results logged to /home/tusharkhatiwada/.rvm/gems/ruby-2.0.0-p247@rails4.0.0/gems/pg-0.17.0/ext
/gem_make.out
之后，我再次尝试使用 gem install pg - --with-pg-config = '/ usr / bin / pg_config'
并显示以下错误：
After that I again tried with gem install pg -- --with-pg-config= '/usr/bin/pg_config'
and the following error is displayed:
Building native extensions with: '--with-pg-config= /usr/bin/pg_config'
This could take a while...
ERROR: Error installing pg:
ERROR: Failed to build gem native extension.
/home/tusharkhatiwada/.rvm/rubies/ruby-2.0.0-p247/bin/ruby extconf.rb --with-pg-config= /us
r/bin/pg_config
Using config values from
sh: 1: : Permission denied
sh: 1: : Permission denied
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/tusharkhatiwada/.rvm/rubies/ruby-2.0.0-p247/bin/ruby
--with-pg
--without-pg
--with-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}/
Gem files will remain installed in /home/tusharkhatiwada/.rvm/gems/ruby-2.0.0-p247@rails4.0.0/g
ems/pg-0.17.0 for inspection.
Results logged to /home/tusharkhatiwada/.rvm/gems/ruby-2.0.0-p247@rails4.0.0/gems/pg-0.17.0/ext
/gem_make.out
推荐答案
如果您使用的是Ubuntu，请尝试安装以下lib文件
If you are using Ubuntu try to install following lib file
sudo apt-get install libpq-dev
然后gem install pg
and then gem install pg
为我工作。
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