I just installed Rails 4.0.2
and when creating a new app, in the bundle stage I get:
Installing pg (0.17.1)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/Users/Dee/.rvm/rubies/ruby-2.0.0-p247/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.
How do I fix this?
Some kind of error resported here Installing PG gem on OS X - failure to build native extension
To install dependencies on Ubuntu try this:
sudo apt-get install libpq-dev
and this
gem install pg
I'm on a Mac running Mavericks. My solution was to install Postgres .
And then in terminal install using homebrew with the configuration:
gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/latest/bin/pg_config
Note: This answer has been edited to use the latest
symlink that is currently included in shipping versions of the Postgres app.
Previous versions suggested:
gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.4/bin/pg_config
app root:
NOTE: replace the version number in step 3 if needed.
I installed under mac OSX Mavericks, having the postgres app (Version 9.2.2.0 ) from www.postgresapp.com installed. The underlying problem was simpy that the since postgres was installed via the app, the configuration file resides on a location which is not the default one when installing it without postgressapp. so we need to tell gem where to find this file by:
gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/MacOS/bin/pg_config
Hope it helps
If gem install pg fails, try the following command:
env ARCHFLAGS="-arch x86_64" gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/MacOS/bin/pg_config
... from the PostgreSQL.app Documentation
Looks like you do not have PostgreSQL installed. The pg
gem requires some headers from PostgreSQL to compile native extension.
我必须结合一切并使用
sudo env ARCHFLAGS="-arch x86_64" gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.4/bin/pg_config
If you are using something other than Postgres in development and Postgres in production only, you can add the pg gem to your gemfile like so...
group :production do
gem 'pg', '0.17.1'
end
Then use bundle install --without production
For CentOS users:
sudo yum install postgresql-devel
and
gem install pg
I have just set up a new Macbook Pro which was prebuilt with Catalina.
What worked for me:
export PATH="/Applications/Postgres.app/Contents/Versions/latest/bin:$PATH"
to your .zshenv
, since Z shell is now the default terminal.After installing Postgres I had to run the following command
env ARCHFLAGS="-arch x86_64" gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.3/bin/pg_config
After this bundle install works great!
Hope it helps
The way I managed to get past that error was:
rbenv local 2.1.2
bundle install --path vendor/bundle
This did it for me.
我需要使用 sudo
sudo gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.5/bin/pg_config
I was having a problem with Amazon and couldn't use apt-get. For my worked:
sudo yum install postgresql-devel
then:
bundle install
and try again:
rails serve
If you installed through Homebrew; gem install pg -- --with-pg-config=/usr/local/bin/pg_config
. Works with Ruby 2.4.6 and pg 0.20.0.
On mac this command worked for me.
gem install pg -v '0.18.4' -- --with-cflags="-Wno-error=implicit-function-declaration"
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