Postgres not installing in Bundler (Ruby on Rails) - ruby-on-rails

Question

I am getting pretty desperate, i have tried every answer on the subject but nothing seems to work.
the error log looks like this:
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby -r ./siteconf20150523-16458-46bzoo.rb extconf.rb --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.3/bin/pg_config
Using config values from /Applications/Postgres.app/Contents/Versions/9.3/bin/pg_config
sh: /Applications/Postgres.app/Contents/Versions/9.3/bin/pg_config: No such file or directory
sh: /Applications/Postgres.app/Contents/Versions/9.3/bin/pg_config: 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
extconf failed, exit code 1
Gem files will remain installed in /Users/kevinegstorf/.rvm/gems/ruby-2.0.0-p643/gems/pg-0.18.2 for inspection.
Results logged to /Users/kevinegstorf/.rvm/gems/ruby-2.0.0-p643/extensions/universal-darwin-14/2.0.0/pg-0.18.2/gem_make.out
An error occurred while installing pg (0.18.2), and Bundler cannot continue.
Make sure that `gem install pg -v '0.18.2'` succeeds before bundling.
Installing gem install pg -v '0.18.2' gives me back the same error
I hope someone can help me. tnx

Answer 1

If you already install Postgres.app in Mac,
you should copy /Applications/Postgres.app/Contents/Version/9.4/bin/pg_config to another place. For example /home/pg_config
then run
bundle config build.pg --with-pg-config=/home/pg_config
bundle install

Answer 2

You should find your pg_config file and add it to the build command:
bundle config build.pg --with-pg-config=/usr/local/bin/pg_config
Since your pg_config file is located at /usr/local/bin/pg_config Did you try the command(edited) above?
If that doesn't help maybe try:
env ARCHFLAGS="-arch x86_64" gem install pg