Unable to install PG gem on Fedora 17

Question

The pg gem is being stubborn so I can't load my app on new computer. Seems like multiple problems, not being able to locate pg_config and then extconf.rb

#psql working...
psql (9.2.1)
Type "help" for help.

nd =>
\q

$ pg_config:

#adding the path to bashrc...
$ nano .bashrc

PATH=/usr/pgsql-9.2/bin:$PATH

#seems to work...
pg_config: /usr/pgsql-9.2/bin/pg_config

$ sudo gem install pg

#but i get the same errors...
Building native extensions.  This could take a while...
.......
ERROR:  Error installing pg:
        ERROR: Failed to build gem native extension.

        /usr/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.

any linux people out there that have dealt with this problem?

Answer 1

这是通过解决的

$ yum install /usr/include/libpq-fe.h

Answer 2

对于Fedora 20+，需要以下包：

sudo yum install postgresql-devel

Answer 3

for fedora 30:

$sudo dnf install libpq-devel

then:

$gem install pg

Building native extensions. This could take a while...
Successfully installed pg-1.1.4
Parsing documentation for pg-1.1.4
Installing ri documentation for pg-1.1.4
Done installing documentation for pg after 1 seconds
1 gem installed

Answer 4

~ Hi

I had the same problem installing the gem "pg" in my Rails project, when ran the command "bundle install" had the same error, in my case partiuclar solve it as follows:

I use Fedora 19, I guess it can be solved in the same way in Fedora 17:

I Installed Postgres using the following tutorial:

• http://goo.gl/AhZZKR

Then, I added the next line in my ~/.bashrc to solve the problem with the pg_config:

• PATH = / usr/pgsql-9.2/bin: $ PATH

And finally to solve the problem with libpq-fe.h, I installed postgresql-devel as follows:

• # yum install postgresql92-devel

Finally in my Rails project ran the command "bundle install" and no more errors.