gem安装pg遇到问题

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}/lib64

--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