gemでpgをインストールしようとするとNo pg_config… trying anyway. If building fails, please try again withとエラーが表示される

  2013-07-01


gemでpgをインストールしようとするとNo pg_config… trying anyway. If building fails, please try again withとエラーが表示される

ERROR: Error installing pg: ERROR: Failed to build gem native extension.

/usr/local/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=/usr/local/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 /usr/local/lib/ruby/gems/1.8/gems/pg-0.13.2 for inspection. Results logged to /usr/local/lib/ruby/gems/1.8/gems/pg-0.13.2/ext/gem_make.out

こんな感じのエラーが表示された場合、

などとpg_configのパスを指定すればおk

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