Installing PG gem on OS X - failure to build native extension

Question

It seems many others have had problems installing the pg gem  None of the solutions posed for others have worked for me    I have tried to install the pg gem and postgres app  The pg gem won t install  The first error I get is   An error occurred while installing pg  0 17 0   and Bundler cannot continue  Make sure that gem install pg -v  0 17 0  succeeds before bundling   The installation advice about pointing my gem install to the config for pg fails with the following error message  which many others on this forum have encountered    Failed to build native extensions    Results logged to  Users melanie  rvm gems ruby-1 9 3-p448 gems pg-0 17 0 ext gem make out   I don t know how to find or access this log file to search for further clues     I also get an error message  command not found  when I try using the sudo apt-get install command  I ve scoured this forum for the last 6 hours  trying each piece of advice to get pg working with my rails project   I can t find advice about how to change a path  or specifically  what change is required   My which pg config returns a file source  I ve used that with a command to install pg using that config  It fails   There are so many people that have had trouble with this  Many answers suggest homebrew  I ve had to remove that because it threw up other issues

User · Answer

I believe the    correct    answer would be to first configure PATH correctly for Postgres app by adding the following to    profile   zshrc or    zprofile if using ZSH    export PATH  PATH  Applications Postgres app Contents Versions latest bin   Then open a new tab or window in terminal and install the pg gem with   ARCHFLAGS  -arch x86 64  gem install pg   Documented here    https   postgresapp com documentation cli-tools html https   postgresapp com documentation configuration-ruby html

User · Answer

I spent a day on this and here s how I got it fixed   I found that global value of build pg was set to   opt local lib postgresql91 bin pg config  and that was not where postgres was installed    I fixed it with replacing the value of build pg to   bundle config build pg --with-pg-config  usr local Cellar postgresql 9 4 4 bin pg config  which is where my postgresql installation is

User · Answer

easy step   brew install postgresql gem install pg -v  your version

User · Answer

For those who are not interested to use brew     Download PostgreSQL application  Follow the macOS default instruction to install it  It is advisable to run PostgreSQl  Run gem install pg -- --with-pg-config  path to postgress in your applications folder     For example  in my machine it is  Applications Postgres app Contents Versions 12 bin pg config

User · Answer

I am using OS X Mavericks  version 10 9   and when I run the above I got the following message  If builds of PostgreSQL 9 are failing and you have version 8 x installed   So I run the following command   ARCHFLAGS  -arch x86 64  gem install pg   and this worked for me  I hope this helps someone

User · Answer

Similarly  after installing Mavericks bundle update was throwing an error on the pg gem  which is only used on production and not locally    I use Brew to manage my packages and postgresql was already installed  but still I was getting the  no pg config  error   The fix was to just brew uninstall postgresql  then brew install postgresql  After which I was immediately able to successfully run bundle update

User · Answer

Same error for me and I didn t experience it until I downloaded OS X 10 9  Mavericks   Sigh  another OS upgrade headache   Here s how I fixed it  with homebrew     Install another build of Xcode Tools  typing brew update in the terminal will prompt you to update the Xcode build tools  brew update brew install postgresql   After that gem install pg worked for me

User · Answer

i got same problem and i solved gem update --system 3 0 6

User · Answer

Try   gem install pg -- --with-pg-config  which pg config

User · Answer

running brew update and then brew install postgresql worked for me  I was able to run the pg gem file no problem after that

User · Answer

Ok I also had this problem  psql is v 9 3 0 and ruby is v 2 1 2  and the solution that worked for me was setting the bundle config settings first   bundle config build pg -- --with-pg-config  Applications Postgres app Contents Versions 9 3 bin pg config   This answer finally helped me figure it out  https   stackoverflow com a 9235107 3546680

User · Answer

On OSX with Postgres installed in  Applications  I simply run the following command  change 0 20   amp  9 4 according to your version   gem install pg -v  0 20  -- --with-pg-config  Applications Postgres app Contents Versions 9 4 bin pg config   You should have        Building native extensions with     --with-pg-config  Applications Postgres app Contents Versions 9 4 bin pg config    This could take a while    Successfully installed pg-0 20

User · Answer

If you are using Ubuntu try to install following lib file  sudo apt-get install libpq-dev   and then   gem install pg  worked for me

User · Answer

Solved  I found some lack of library for PostgreSQL on the system  Only two steps solved it   brew install postgresql  Then run   gem install pg

User · Answer

I tried everything for hours but the following finally fixed it  I m on OS X 10 9 4     Install Xcode command line tools  Apple Developer site  brew uninstall postgresql brew install postgresql ARCHFLAGS  -arch x86 64  gem install pg

[ruby-on-rails] Installing PG gem on OS X - failure to build native extension

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