gem安装pg遇到问题 安装pg遇到问题 #gem install pg 报错信息为： Building native extensions. This could take a while... ERROR: Error installing pg: ERROR: Failed to build gem native extension. /usr/bin/ruby extconf.rb checking for pg_config..

gem安装pg遇到问题

安装pg遇到问题

#gem install pg

报错信息为：

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

/usr/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/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/oss/.gem/ruby/gems/pg-0.17.1 for inspection.
Results logged to /home/oss/.gem/ruby/gems/pg-0.17.1/ext/gem_make.out

#=============================================================

说明：

注意看上边的报错信息（如下边这样的语句）：

checking for libpq-fe.h... no
Can't find the 'libpq-fe.h header

你安装其他gem插件的时候也会遇到类似这样的问题，找不到什么什么.h这样的文件，就是缺少你安装的这个gem包的依赖包，一般都是安装xxxx-devel就能解决问题。

例如我遇到的这个问题，安装postgresql这个数据库的依赖包就行了postgresql-devel，具体执行下面的命令即可

#===================================================================

解决方法：

安装postgresql数据库的依赖包

#yum install postgresql-devel

安装好以后再安装pg这个gem包

#gem install pg

OK，搞定