How to install PostgreSQL s pg gem on Ubuntu

Question

I m trying to install PostgreSQL s pg gem for Ruby   I issued the following command   gem install pg   I installed Ruby 1 9 2 using RVM   The above command shows me the following error   The error is    Building native extensions   This could take a while     ERROR   Error installing pg   ERROR  Failed to build gem native extension    home User  rvm rubies ruby-1 9 2-preview3 bin ruby extconf rb  checking for pg config    yes checking for libpq-fe h    yes checking for libpq libpq-fs 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  home User  rvm rubies ruby-1 9 2-preview3 bin ruby  --with-pg  --without-pg  --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  --enable-static-build  --disable-static-build  --with-pqlib  --without-pqlib  --with-libpqlib  --without-libpqlib  --with-ms libpqlib  --without-ms libpqlib  Gem files will remain installed in  home user  rvm gems ruby-1 9 2-preview3 gems pg-0 9 0 for inspection   Results logged to  home user  rvm gems ruby-1 9 2-preview3 gems pg-0 9 0 ext gem make out   I don t know what is the error

User · Answer

I had the same problem  and tried a lot of different variants  After some tries I became able to sudo gem install  but still have problem to install it without sudo  Finally I found a decission - reinstalling of rvm helped me  Probably it can save time somebody else

User · Answer

Try this   sudo apt-get install postgresql postgresql-contrib libpq-dev   You should install PG Database server in the first place to install clients  Afterwards  you install clients   See this blog post to know about setting up PostGresSQL for the first time for Ruby on Rails development

User · Answer

You need install the postgreSQL dev package with header of PostgreSQL  sudo apt-get install libpq-dev

User · Answer

I m on Ubuntu 12 10 and running this command   apt-get install libpq-dev   helped me - after that ran gem install pg -v  0 14 1   and all good now

User · Answer

Simple solution for ubuntu users     First uninstall all postgres packages  then run these commads     sudo apt-get install postgresql sudo apt-get install postgresql-client libpq5 libpq-dev    for rvm  single user  mv    rvm usr lib    rvm usr lib rvm     for rvm  multi-user  mv  usr local rvm usr lib  usr local rvm usr lib rvm  gem install pg  --   --with-pg-lib  usr lib   Then run  bundle install   Every thing will be fine  Have a good day

User · Answer

For anyone who is still having issues after trying all the answers on this page  the following  finally  worked   sudo apt-get install libgmp3-dev gem install pg   This was after doing everything else mentioned on this page   postgresql 9 5 8 Ubuntu 16 10

User · Answer

For  RVM users it will be better   rvmsudo gem install pg -- --with-pg-lib  usr lib    it worked for me  after i saw jdupont version

User · Answer

Need to add package   sudo apt-get install libpq-dev   to install pg gem in RoR

User · Answer

sudo apt-get install postgresql-client libpq5 libpq-dev then do gem install pg

User · Answer

I was trying to setup a Rails project in my freshly installed Ubuntu 16 04  I ran into the same issue while running bundle  Running  sudo apt-get install aptitude   followed by   sudo apt-get install libpq-dev   Solved it for me

User · Answer

If you have libpq-dev installed and are still having this problem it is likely due to conflicting versions of OpenSSL s libssl and friends - the Ubuntu system version in  usr lib  which libpq is built against  and a second version RVM installed in  HOME  rvm usr lib  or  usr local rvm usr lib if it s a system install   You can verify this by temporarily renaming  HOME  rvm usr lib and seeing if  gem install pg  works   To solve the problem have rvm rebuild using the system OpenSSL libraries  you may need to manually remove libssl   and libcrypto   from the rvm usr lib dir    rvm reinstall 1 9 3 --with-openssl-dir  usr   This finally solved the problem for me on Ubunto 12 04

User · Answer

Another solution to this problem is to install PostgreSQL using Homebrew linuxbrew    brew install postgresql  As a matter of habit I don t like to use sudo unless I have to

User · Answer

For those trying to install Redmine  I missed sudo apt-get install ruby-all-dev after trying all of the above   Initial error being mkmf rb can t find header files for ruby at  usr lib ruby include ruby h

User · Answer

In Ubuntu this works for me  I hope help you   sudo apt-get install libpq-dev   and  gem install pg  --   --with-pg-lib  usr lib

User · Answer

After reading and thrashing around for 2 days  and trying many things found in other notes the following single line was the cure for me on Ubuntu Lucid 10 04 mixed with some Maverick packages and RVM   ruby 1 9 2-p290   rvm 1 10 2 rubygems 1 8 15  rails 3 0 1  postgres 8 4 10     gem install pg  --   --with-pg-lib  usr lib      the result     Building native extensions   This could take a while      Successfully installed pg-0 13 1   1 gem installed   Installing ri documentation for pg-0 13 1      Installing RDoc documentation for pg-0 13 1         yea - finally success      note that the output from running pg config lacks the item  -lpq   in the LIBS variable on my Ubuntu   Postresql install    and why the switch from   pq  to pg   in certain places -- confusing to newbie     the thing I still do not understand is the double set of  --   and  --with option but I m way beyond my depth anyway

User · Answer

apt-get install ruby-dev worked for me

User · Answer

This solved the problem for me on Ubuntu 12 04 after every suggestion here had failed   rvmsudo gem install pg -v  0 12 2  -- --with-pg-lib  usr include postgresql

User · Answer

Another option is to use Homebrew which works on Linux and macOS to install just the supporting libraries   brew install libpq  then  brew link libpq --force   the --force option is required because it conflicts with the postgres formula

User · Answer

Installing libpq-dev did not work for me  I also needed to install build-essential  sudo apt-get install libpq-dev build-essential

[ruby] How to install PostgreSQL's pg gem on Ubuntu?

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