title: I can't install pg in Slackware
body: <p>I need to run a ruby project with gems and specs. When I type bundle install I received:</p>
  <pre><code>bash-5.1# bundle install
  Don't run Bundler as root. Bundler can ask for sudo if it is needed, and
  installing your bundle as root will break this application for all non-root
  users on this machine.
  Fetching gem metadata from https://rubygems.org/...
  Resolving dependencies...
  Using bundler 2.3.9
  Using diff-lcs 1.5.0
  Using rspec-support 3.1.2
  Fetching pg 1.3.4
  Using rspec-core 3.1.7
  Using rspec-expectations 3.1.2
  Using rspec-mocks 3.1.3
  Using rspec 3.1.0
  Installing pg 1.3.4 with native extensions
  Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
  
      current directory: /usr/lib64/ruby/gems/3.0.0/gems/pg-1.3.4/ext
  /usr/bin/ruby -I /usr/lib64/ruby/3.0.0 -r ./siteconf20220320-7556-sm89ck.rb
  extconf.rb
  Calling libpq with GVL unlocked
  checking for pg_config... no
  checking for libpq per pkg-config... no
  Using libpq from 
  checking for libpq-fe.h... no
  Can't find the 'libpq-fe.h header
  *****************************************************************************
  
  Unable to find PostgreSQL client library.
  
  Please install libpq or postgresql client package like so:
    sudo apt install libpq-dev
    sudo yum install postgresql-devel
    sudo zypper in postgresql-devel
    sudo pacman -S postgresql-libs
  
  or try again with:
    gem install pg -- --with-pg-config=/path/to/pg_config
  
  or set library paths manually with:
  gem install pg -- --with-pg-include=/path/to/libpq-fe.h/
  --with-pg-lib=/path/to/libpq.so/
  
  *** 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}/lib64
      --with-make-prog
      --without-make-prog
      --srcdir=.
      --curdir
      --ruby=/usr/bin/$(RUBY_BASE_NAME)
      --with-pg
      --without-pg
      --enable-gvl-unlock
      --disable-gvl-unlock
      --enable-windows-cross
      --disable-windows-cross
      --with-pg-config
      --without-pg-config
      --with-pg_config
      --without-pg_config
      --with-libpq-config
      --without-libpq-config
      --with-pkg-config
      --without-pkg-config
      --with-pg-dir
      --without-pg-dir
      --with-pg-include
      --without-pg-include=${pg-dir}/include
      --with-pg-lib
      --without-pg-lib=${pg-dir}/lib64
  
  To see why this extension failed to compile, please check the mkmf.log which can
  be found here:
  
    /usr/lib64/ruby/gems/3.0.0/extensions/x86_64-linux/3.0.0/pg-1.3.4/mkmf.log
  
  extconf failed, exit code 1
  
  Gem files will remain installed in /usr/lib64/ruby/gems/3.0.0/gems/pg-1.3.4 for
  inspection.
  Results logged to
  /usr/lib64/ruby/gems/3.0.0/extensions/x86_64-linux/3.0.0/pg-1.3.4/gem_make.out
  
    /usr/lib64/ruby/3.0.0/rubygems/ext/builder.rb:93:in `run'
    /usr/lib64/ruby/3.0.0/rubygems/ext/ext_conf_builder.rb:47:in `block in build'
    /usr/lib64/ruby/gems/3.0.0/gems/tempfile-0.1.2/lib/tempfile.rb:317:in `open'
    /usr/lib64/ruby/3.0.0/rubygems/ext/ext_conf_builder.rb:26:in `build'
    /usr/lib64/ruby/3.0.0/rubygems/ext/builder.rb:159:in `build_extension'
  /usr/lib64/ruby/3.0.0/rubygems/ext/builder.rb:193:in `block in
  build_extensions'
    /usr/lib64/ruby/3.0.0/rubygems/ext/builder.rb:190:in `each'
    /usr/lib64/ruby/3.0.0/rubygems/ext/builder.rb:190:in `build_extensions'
    /usr/lib64/ruby/3.0.0/rubygems/installer.rb:845:in `build_extensions'
  /usr/lib64/ruby/gems/3.0.0/gems/bundler-2.3.9/lib/bundler/rubygems_gem_installer.rb:71:in
  `build_extensions'
  /usr/lib64/ruby/gems/3.0.0/gems/bundler-2.3.9/lib/bundler/rubygems_gem_installer.rb:28:in
  `install'
  /usr/lib64/ruby/gems/3.0.0/gems/bundler-2.3.9/lib/bundler/source/rubygems.rb:204:in
  `install'
  /usr/lib64/ruby/gems/3.0.0/gems/bundler-2.3.9/lib/bundler/installer/gem_installer.rb:54:in
  `install'
  /usr/lib64/ruby/gems/3.0.0/gems/bundler-2.3.9/lib/bundler/installer/gem_installer.rb:16:in
  `install_from_spec'
  /usr/lib64/ruby/gems/3.0.0/gems/bundler-2.3.9/lib/bundler/installer/parallel_installer.rb:186:in
  `do_install'
  /usr/lib64/ruby/gems/3.0.0/gems/bundler-2.3.9/lib/bundler/installer/parallel_installer.rb:177:in
  `block in worker_pool'
  /usr/lib64/ruby/gems/3.0.0/gems/bundler-2.3.9/lib/bundler/worker.rb:62:in
  `apply_func'
  /usr/lib64/ruby/gems/3.0.0/gems/bundler-2.3.9/lib/bundler/worker.rb:57:in
  `block in process_queue'
  /usr/lib64/ruby/gems/3.0.0/gems/bundler-2.3.9/lib/bundler/worker.rb:54:in
  `loop'
  /usr/lib64/ruby/gems/3.0.0/gems/bundler-2.3.9/lib/bundler/worker.rb:54:in
  `process_queue'
  /usr/lib64/ruby/gems/3.0.0/gems/bundler-2.3.9/lib/bundler/worker.rb:91:in
  `block (2 levels) in create_threads'
  
  An error occurred while installing pg (1.3.4), and Bundler cannot
  continue.
  
  In Gemfile:
    pg
  </code></pre>
  <p>I am trying to convince them to switch to Slackware as the main OS but I am having trouble installing and running the skeleton program that uses psql, ruby and soon enough ruby on rails.</p>
  <p>I installed libpqxx slackbuild, sqlite3 gem,  postgresql (14.2)  slackbuild and when I run rnu ./import_db.sh it says: bash-5.1# ./import_db.sh
  dropdb: error: connection to server on socket &quot;/tmp/.s.PGSQL.5432&quot; failed: No such file or directory
  Is the server running locally and accepting connections on that socket?
  createdb: error: connection to server on socket &quot;/tmp/.s.PGSQL.5432&quot; failed: No such file or directory
  Is the server running locally and accepting connections on that socket?
  psql: error: connection to server on socket &quot;/tmp/.s.PGSQL.5432&quot; failed: No such file or directory
  Is the server running locally and accepting connections on that socket?
  bash-5.1#</p>