client connections.  <productname>OpenSSL</productname> is
      also required for random number generation on platforms that do not
      have <filename>/dev/urandom</filename> (except Windows).  The minimum
      required version is 1.1.1.
     </para>
     <para>
      Additionally, <productname>LibreSSL</productname> is supported using the
      <productname>OpenSSL</productname> compatibility layer.  The minimum
      required version is 3.4 (from <systemitem class="osname">OpenBSD</systemitem>
      version 7.0).
     </para>
    </listitem>

    <listitem>
     <para>
      You need <application>MIT Kerberos</application> (for GSSAPI),
      <productname>OpenLDAP</productname>, and/or <application>PAM</application>,
      if you want to support authentication using those services.
     </para>
    </listitem>

    <listitem>
     <para>
      You need <productname>Curl</productname> to build an optional module
      which implements the <link linkend="libpq-oauth">OAuth Device
      Authorization flow</link> for client applications.
     </para>
    </listitem>

    <listitem>
     <para>
      You need <productname>LZ4</productname>, if you want to support
      compression of data with that method; see
      <xref linkend="guc-default-toast-compression"/> and
      <xref linkend="guc-wal-compression"/>.
     </para>
    </listitem>

    <listitem>
     <para>
      You need <productname>Zstandard</productname>, if you want to support
      compression of data with that method; see
      <xref linkend="guc-wal-compression"/>.
      The minimum required version is 1.4.0.
     </para>
    </listitem>

    <listitem>
     <para>
      To build the <productname>PostgreSQL</productname> documentation,
      there is a separate set of requirements; see
      <xref linkend="docguide-toolsets"/>.
     </para>
    </listitem>
   </itemizedlist>
  </para>

  <para>
   If you need to get a <acronym>GNU</acronym> package, you can find
   it at your local <acronym>GNU</acronym> mirror site (see <ulink
   url="https://www.gnu.org/prep/ftp"></ulink>
   for a list) or at <ulink
   url="ftp://ftp.gnu.org/gnu/"></ulink>.
  </para>
 </sect1>

 <sect1 id="install-getsource">
  <title>Getting the Source</title>

  <para>
   The <productname>PostgreSQL</productname> source code for released versions
   can be obtained from the download section of our website:
   <ulink url="https://www.postgresql.org/ftp/source/"></ulink>.
   Download the
   <filename>postgresql-<replaceable>version</replaceable>.tar.gz</filename>
   or <filename>postgresql-<replaceable>version</replaceable>.tar.bz2</filename>
   file you're interested in, then unpack it:
<screen>
<userinput>tar xf postgresql-<replaceable>version</replaceable>.tar.bz2</userinput>
</screen>
   This will create a directory
   <filename>postgresql-<replaceable>version</replaceable></filename> under
   the current directory with the <productname>PostgreSQL</productname> sources.
   Change into that directory for the rest of the installation procedure.
  </para>

  <para>
   Alternatively, you can use the Git version control system; see
   <xref linkend="git"/> for more information.
  </para>
 </sect1>

 <sect1 id="install-make">
  <title>Building and Installation with Autoconf and Make</title>

 <sect2 id="install-short-make">
  <title>Short Version</title>

  <para>
<synopsis>
./configure
make
su
make install
adduser postgres
mkdir -p /usr/local/pgsql/data
chown postgres /usr/local/pgsql/data
su - postgres
/usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data
/usr/local/pgsql/bin/pg_ctl -D /usr/local/pgsql/data -l logfile start
/usr/local/pgsql/bin/createdb test
/usr/local/pgsql/bin/psql test
</synopsis>
   The long version is the rest of this
   <phrase>section</phrase>.
  </para>
 </sect2>


 <sect2 id="install-procedure-make">
  <title>Installation Procedure</title>

  <procedure>

  <step id="configure">
   <title>Configuration</title>

   <indexterm zone="configure">
    <primary>configure</primary>