pg gem
インストールできません。私は--with-pg_config
成功せずにこれを試しました。
Gem::Installer::ExtensionBuildError: エラー: gem 基本拡張をビルドできません。
/usr/local/rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb
checking for pg_config... no
No pg_config... trying anyway. If building fails, please try again with
--with-pg-config=/path/to/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.