我一直在尝试在我的ruby 1.9.3-p286上安装"pg"宝石，但似乎没有任何作用。
我已经安装了postgresql（9.1）、libpq-dev和其他一些像postgresql-server-dev-9.1这样的软件包。我尝试通过传递“with-pg-config”标志来安装gem，但仍然没有任何作用。
每次我尝试安装gem时，都会输出类似于以下内容：
Building native extensions. This could take a while...
ERROR: Error installing pg:
ERROR: Failed to build gem native extension.
/home/lynux/.rvm/rubies/ruby-1.9.3-p286/bin/ruby extconf.rb
checking for pg_config... yes
Using config values from /usr/bin/pg_config
checking for libpq-fe.h... yes
checking for libpq/libpq-fs.h... yes
checking for pg_config_manual.h... yes
checking for PQconnectdb() in -lpq... no
checking for PQconnectdb() in -llibpq... no
checking for PQconnectdb() in -lms/libpq... no
Can't find the PostgreSQL client library (libpq)
*** 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
--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/lynux/.rvm/rubies/ruby-1.9.3-p286/bin/ruby
--with-pg
--without-pg
--with-pg-dir
--without-pg-dir
--with-pg-include
--without-pg-include=${pg-dir}/include
--with-pg-lib
--without-pg-lib=${pg-dir}/lib
--with-pg-config
--without-pg-config
--with-pg_config
--without-pg_config
--with-pqlib
--without-pqlib
--with-libpqlib
--without-libpqlib
--with-ms/libpqlib
--without-ms/libpqlib
Gem files will remain installed in /home/lynux/.rvm/gems/ruby-1.9.3-p286@phisiodata/gems/pg-0.14.1 for inspection.
Results logged to /home/lynux/.rvm/gems/ruby-1.9.3-p286@phisiodata/gems/pg-0.14.1/ext/gem_make.out
我做错了什么？在尝试安装宝石之前，我是否应该做些其他事情？
提前致谢。
[编辑]
好的，所以joelparkerhenderson的答案让我想到可能存在路径和库方面的问题，然后我继续深入挖掘...
我找到了this 一篇很棒的文章，解决了问题！问题基本上出在RVM上。所以，我的问题已经解决了，对于任何可能遭受同样问题的人，请点击链接！