当我运行bundle install时，它会给出：
Installing pg 0.18.4 with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb --with-pg-config=/Applications/Postgres.app/Contents/Versions/latest/bin:/Users/ramishshahzad/.rbenv/shims:/Users/ramishshahzad/.rbenv/shims:/Applications/Postgres.app/Contents/Versions/9.5/bin:/Applications/Postgres.app/Contents/Versions/9.5/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin/sbin
Using config values from /Applications/Postgres.app/Contents/Versions/latest/bin:/Users/ramishshahzad/.rbenv/shims:/Users/ramishshahzad/.rbenv/shims:/Applications/Postgres.app/Contents/Versions/9.5/bin:/Applications/Postgres.app/Contents/Versions/9.5/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin/sbin
sh: /Applications/Postgres.app/Contents/Versions/latest/bin:/Users/ramishshahzad/.rbenv/shims:/Users/ramishshahzad/.rbenv/shims:/Applications/Postgres.app/Contents/Versions/9.5/bin:/Applications/Postgres.app/Contents/Versions/9.5/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin/sbin: No such file or directory
sh: /Applications/Postgres.app/Contents/Versions/latest/bin:/Users/ramishshahzad/.rbenv/shims:/Users/ramishshahzad/.rbenv/shims:/Applications/Postgres.app/Contents/Versions/9.5/bin:/Applications/Postgres.app/Contents/Versions/9.5/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin/sbin: No such file or directory
checking for libpq-fe.h... yes
checking for libpq/libpq-fs.h... yes
checking for pg_config_manual.h... yes
checking for PQconnectdb() in -lpq... no
checking for PQconnectdb() in -llibpq... no
checking for PQconnectdb() in -lms/libpq... no
Can't find the PostgreSQL client library (libpq)
*** 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=/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby
--with-pg
--without-pg
--enable-windows-cross
--disable-windows-cross
--with-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}/
--with-pqlib
--without-pqlib
--with-libpqlib
--without-libpqlib
--with-ms/libpqlib
--without-ms/libpqlib
Gem files will remain installed in /var/folders/6m/cn4bddqx4yz3jgl54hwccscc0000gn/T/bundler20160509-18530-6yu7yypg-0.18.4/gems/pg-0.18.4 for inspection.
Results logged to /var/folders/6m/cn4bddqx4yz3jgl54hwccscc0000gn/T/bundler20160509-18530-6yu7yypg-0.18.4/gems/pg-0.18.4/ext/gem_make.out
Using rack 1.6.4
Using tilt 2.0.1
Using bundler 1.11.2
Using tzinfo 1.2.2
Using ripl 0.7.1
An error occurred while installing pg (0.18.4), and Bundler cannot continue.
Make sure that `gem install pg -v '0.18.4'` succeeds before bundling.
我已经运行了gem install pg -v＆＃39; 0.18.4＆＃39;它安装成功： 但是，当我运行＆＃39;捆绑安装＆＃39;再次，它给出了同样的错误。 我运行postgresql并运行brew更新，但仍然面临错误。