[ruby-on-rails] Rails 3-pg gem을 설치할 수 없습니다.

번들 (번들 설치)을 실행하려고하면 항상

Installing pg (0.13.2) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /Users/ryan/.rvm/rubies/ruby-1.9.2-p290/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.

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=/Users/ryan/.rvm/rubies/ruby-1.9.2-p290/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


Gem files will remain installed in /Users/ryan/.rvm/gems/ruby-1.9.2-p290/gems/pg-0.13.2 for inspection.
Results logged to /Users/ryan/.rvm/gems/ruby-1.9.2-p290/gems/pg-0.13.2/ext/gem_make.out
An error occured while installing pg (0.13.2), and Bundler cannot continue.
Make sure that `gem install pg -v '0.13.2'` succeeds before bundling.

Mac OS X 10.6을 사용하고 있으며 설치된 PostgreSQL 버전은 9.1입니다. 문제가 libpq-dev 에 있음을 발견했습니다 . 어떻게 설치 / 수정할 수 있습니까?

답변

gem install pg -- --with-pg-config= 'PATH_TO_YOUR_PG_CONFIG'

which pg_config

sudo apt-get install postgresql
sudo apt-get install libpq-dev

gem install pg

bundle install

 PATH="/Applications/Postgres.app/Contents/MacOS/bin:$PATH"

/Applications/Postgres.app/Contents/Versions/<version>/bin

brew search libpq

brew install libpqxx

sudo apt-get install libpq-dev