Pg Gem installation issue after upgrading Ruby2.2 for Rails3.2.18

[PAVAN KUMAR IMMANNI]

Question:

Under ubuntu-12.04_32bit OS, i installed with Ruby 1.9.3 and Rails 3.2.18.

Postgresql DB server is: 9.1, pg gem -v '0.13.2'

After upgrading Ruby from 1.9.3 to 2.2.0, i'm not able to do any rake operations. With this error https://stackoverflow.com/questions/37083480/pg-ext-so-undefined-symbol-rb-thread-select

Reference link to resolve this:    https://stackoverflow.com/questions/37083480/pg-ext-so-undefined-symbol-rb-thread-select

So i was trying to upgrade pg gem from 0.13.2 to >=0.15.1 version.

I ended up with Following error, not able to resolve this. Can someone please help me to resolve this issue?

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /home/blueserver/.rvm/rubies/ruby-2.2.0/bin/ruby -r ./siteconf20190822-25751-10e8nmf.rb extconf.rb --with-pg-config=/usr/bin/pg_config

Using config values from /usr/bin/pg_config

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=/home/blueserver/.rvm/rubies/ruby-2.2.0/bin/$(RUBY_BASE_NAME)

--with-pg

--without-pg

--with-pg-dir

--without-pg-dir

--with-pg-include

--without-pg-include=${pg-dir}/include

--with-pg-lib

--without-pg-lib=${pg-dir}/lib

--with-pg-config

--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 /home/blueserver/.rvm/gems/ruby-2.2.0/gems/pg-0.15.1 for inspection.

Results logged to /home/blueserver/.rvm/gems/ruby-2.2.0/extensions/x86-linux/2.2.0/pg-0.15.1/gem_make.out

An error occurred while installing pg (0.15.1), and Bundler cannot continue.

Make sure that `gem install pg -v '0.15.1'` succeeds before bundling.

Note: I tried different resources from Google, but no luck.

[kee...@thebrocks.net]

Hello Pavan,

Go to the pg gem homepage or github account. They know the gem and can help

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[whdzera]

install libpq , libpq-dev