安装pg -v 0.17.1
我正在使用/我想使用Postgresql作为数据库，但是当我输入“bundle install”或“bundle update”时，我收到此错误，我该怎么做才能解决这个问题？ 🙂
Installing pg (0.17.1) with native extensions Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. /usr/local/rvm/rubies/ruby-1.9.3-p392/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/rvm/rubies/ruby-1.9.3-p392/bin/ruby --with-pg --without-pg --with-pg-config --without-pg-config --with-pg_config --without-pg_config --with-pg-dir --without-pg-dir --with-pg-include --without-pg-include=${pg-dir}/include --with-pg-lib --without-pg-lib=${pg-dir}/lib Gem files will remain installed in /Users/rsvmrk/.bundler/tmp/22196/gems/pg-0.17.1 for inspection. Results logged to /Users/rsvmrk/.bundler/tmp/22196/gems/pg-0.17.1/ext/gem_make.out An error occurred while installing pg (0.17.1), and Bundler cannot continue. Make sure that `gem install pg -v '0.17.1'` succeeds before bundling. 有什么建议？
看起来你缺少先决条件库。
sudo apt-get install libpq-dev postgresql-devel
然后安装pg
gem install pg
对于OS X上的用户，我建议使用home-brew进行安装：
brew install postgresql
如果您还不是用户，请在Homebrew的网站上获取更多信息，包括如何设置。
为了与PostgreSQL数据库后端通信，您需要libpq-dev包。
sudo apt-get install libpq-dev
然后继续安装包
gem install pg