ubuntu 下 下面是报错信息。还有个问题，在哪看 heroku 支持的各种包的版本啊？
Building native extensions. This could take a while...
ERROR: Error installing pg:
ERROR: Failed to build gem native extension.
/home/coldfarmer/.rvm/rubies/ruby-2.2.0/bin/ruby -r ./siteconf20150823-3468-1op4obf.rb 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
drine
#5
2015年08月24日
apt-get postguisql 后 gem install pg 还是失败，一样的报错信息。 sudo apt-get install libpg-dev 后的报错信息：
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package libpg-dev
drine
#7
2015年08月24日
drine
#8
2015年08月24日
问题解决了，
bundle config build.pg --with-pg-config=/usr/pgsql-9.1/bin/pg_config
后
sudo apt-get install libpq-dev
成功，pg 也装上了。 参考：http://stackoverflow.com/questions/9234960/gem-install-pg-with-pg-config-works-bundle-fails
