<!-- $PostgreSQL: pgsql/doc/src/sgml/installation.sgml,v 1.347 2010/06/29 22:29:13 momjian Exp $ -->

<chapter id="installation">
 <title><![%standalone-include[<productname>PostgreSQL</>]]>
  Installation from Source Code</title>

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

 <para>
  This <![%standalone-include;[document]]>
  <![%standalone-ignore;[chapter]]> describes the installation of
  <productname>PostgreSQL</productname> using the source code
  distribution.  (If you are installing a pre-packaged distribution,
  such as an RPM or Debian package, ignore this
  <![%standalone-include;[document]]>
  <![%standalone-ignore;[chapter]]>
  and read the packager's instructions instead.)
 </para>

 <sect1 id="install-short">
  <title>Short Version</title>

  <para>
<synopsis>
./configure
gmake
su
gmake install
adduser postgres
mkdir /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/postgres -D /usr/local/pgsql/data &gt;logfile 2&gt;&amp;1 &amp;
/usr/local/pgsql/bin/createdb test
/usr/local/pgsql/bin/psql test
</synopsis>
   The long version is the rest of this
   <![%standalone-include;[document.]]>
   <![%standalone-ignore;[chapter.]]>
  </para>
 </sect1>


 <sect1 id="install-requirements">
  <title>Requirements</title>

  <para>
   In general, a modern Unix-compatible platform should be able to run
   <productname>PostgreSQL</>.
   The platforms that had received specific testing at the
   time of release are listed in <xref linkend="supported-platforms">
   below. In the <filename>doc</> subdirectory of the distribution
   there are several platform-specific <acronym>FAQ</> documents you
   might wish to consult if you are having trouble.
  </para>

  <para>
   The following software packages are required for building
   <productname>PostgreSQL</>:

   <itemizedlist>
    <listitem>
     <para>
      <indexterm>
       <primary>make</primary>
      </indexterm>

      <acronym>GNU</> <application>make</> is required; other
      <application>make</> programs will <emphasis>not</> work.
      <acronym>GNU</> <application>make</> is often installed under
      the name <filename>gmake</filename>; this document will always
      refer to it by that name. (On some systems
      <acronym>GNU</acronym> <application>make</> is the default tool with the name
      <filename>make</>.) To test for <acronym>GNU</acronym>
      <application>make</application> enter:
<screen>
<userinput>gmake --version</userinput>
</screen>
      It is recommended to use version 3.79.1 or later.
     </para>
    </listitem>

    <listitem>
     <para>
      You need an <acronym>ISO</>/<acronym>ANSI</> C compiler (at least
      C89-compliant). Recent
      versions of <productname>GCC</> are recommendable, but
      <productname>PostgreSQL</> is known to build using a wide variety
      of compilers from different vendors.
     </para>
    </listitem>

    <listitem>
     <para>
      <application>tar</> is required to unpack the source
      distribution, in addition to either
      <application>gzip</> or <application>bzip2</>.  In
      addition, <application>gzip</> is required to install the
      documentation.
     </para>
    </listitem>

    <listitem>
     <para>
      <indexterm>
       <primary>readline</primary>
      </indexterm>
      <indexterm>
       <primary>libedit</primary>
      </indexterm>

      The <acronym>GNU</> <productname>Readline</> library is used by
      default.  It allows <application>psql</application> (the
      PostgreSQL command line SQL interpreter) to remember each
      command you type, and allows you to use arrow keys to recall and
      edit previous commands.  This is very helpful and is strongly
      recommended.  If you don't want to use it then you must specify
      the <option>--without-readline</option> option to
      <filename>configure</>. As an alternative, you can often use the
      BSD-licensed <filename>libedit</filename> library, originally
      developed on <productname>NetBSD</productname>. The
      <filename>libedit</filename> library is
      GNU <productname>Readline</productname>-compatible and is used if
      <filename>libreadline</filename> is not found, or if
      <option>--with-libedit-preferred</option> is used as an
      option to <filename>configure</>. If you are using a package-based
      Linux distribution, be aware that you need both the
      <literal>readline</> and <literal>readline-devel</> packages, if
      those are separate in your distribution.
     </para>
    </listitem>

    <listitem>
     <para>
      <indexterm>
       <primary>zlib</primary>
      </indexterm>

      The <productname>zlib</productname> compression library will be
      used by default. If you don't want to use it then you must
      specify the <option>--without-zlib</option> option to
      <filename>configure</filename>. Using this option disables
      support for compressed archives in <application>pg_dump</> and
      <application>pg_restore</>.
     </para>
    </listitem>
   </itemizedlist>
  </para>

  <para>
   The following packages are optional.  They are not required in the
   default configuration, but they are needed when certain build
   options are enabled, as explained below:

   <itemizedlist>
    <listitem>
     <para>
      To build the server programming language
      <application>PL/Perl</application> you need a full
      <productname>Perl</productname> installation, including the
      <filename>libperl</filename> library and the header files.
      Since <application>PL/Perl</application> will be a shared
      library, the <indexterm><primary>libperl</primary></indexterm>
      <filename>libperl</filename> library must be a shared library
      also on most platforms.  This appears to be the default in
      recent <productname>Perl</productname> versions, but it was not
      in earlier versions, and in any case it is the choice of whomever
      installed Perl at your site.
     </para>

     <para>
      If you don't have the shared library but you need one, a message
      like this will appear during the <productname>PostgreSQL</>
      build to point out this fact:
<screen>
*** Cannot build PL/Perl because libperl is not a shared library.
*** You might have to rebuild your Perl installation.  Refer to
*** the documentation for details.
</screen>
      (If you don't follow the on-screen output you will merely notice
      that the <application>PL/Perl</application> library object,
      <filename>plperl.so</filename> or similar, will not be
      installed.)  If you see this, you will have to rebuild and
      install <productname>Perl</productname> manually to be able to
      build <application>PL/Perl</application>.  During the
      configuration process for <productname>Perl</productname>,
      request a shared library.
     </para>
    </listitem>

    <listitem>
     <para>
      To build the <application>PL/Python</> server programming
      language, you need a <productname>Python</productname>
      installation with the header files and
      the <application>distutils</application> module.  The minimum
      required version is <productname>Python</productname>
      2.2.  <productname>Python 3</productname> is supported if it's
      version 3.1 or later; but see
      <![%standalone-include[the <application>PL/Python</> documentation]]>
      <![%standalone-ignore[<xref linkend="plpython-python23">]]>
      when using Python 3.
     </para>

     <para>
      Since <application>PL/Python</application> will be a shared
      library, the <indexterm><primary>libpython</primary></indexterm>
      <filename>libpython</filename> library must be a shared library
      also on most platforms.  This is not the case in a default
      <productname>Python</productname> installation.  If after
      building and installing <productname>PostgreSQL</> you have a file called
      <filename>plpython.so</filename> (possibly a different
      extension), then everything went well.  Otherwise you should
      have seen a notice like this flying by:
<screen>
*** Cannot build PL/Python because libpython is not a shared library.
*** You might have to rebuild your Python installation.  Refer to
*** the documentation for details.
</screen>
      That means you have to rebuild (part of) your
      <productname>Python</productname> installation to create this
      shared library.
     </para>

     <para>
      If you have problems, run <productname>Python</> 2.3 or later's
      configure using the <literal>--enable-shared</> flag.  On some
      operating systems you don't have to build a shared library, but
      you will have to convince the <productname>PostgreSQL</> build
      system of this.  Consult the <filename>Makefile</filename> in
      the <filename>src/pl/plpython</filename> directory for details.
     </para>
    </listitem>

    <listitem>
     <para>
      If you want to build the <application>PL/Tcl</application>
      procedural language, you of course need a <productname>Tcl</>
      installation.  If you are using a pre-8.4 release of
      <productname>Tcl</>, ensure that it was built without multithreading
      support.
     </para>
    </listitem>

    <listitem>
     <para>
      To enable Native Language Support (<acronym>NLS</acronym>), that
      is, the ability to display a program's messages in a language
      other than English, you need an implementation of the
      <application>Gettext</> <acronym>API</acronym>.  Some operating
      systems have this built-in (e.g., <systemitem
      class="osname">Linux</>, <systemitem class="osname">NetBSD</>,
      <systemitem class="osname">Solaris</>), for other systems you
      can download an add-on package from <ulink
      url="http://www.gnu.org/software/gettext/"></ulink>.
      If you are using the <application>Gettext</> implementation in
      the <acronym>GNU</acronym> C library then you will additionally
      need the <productname>GNU Gettext</productname> package for some
      utility programs.  For any of the other implementations you will
      not need it.
     </para>
    </listitem>

    <listitem>
     <para>
      <application>Kerberos</>, <productname>OpenSSL</>,
      <productname>OpenLDAP</>, and/or
      <application>PAM</>, if you want to support authentication or
      encryption using these services.
     </para>
    </listitem>
   </itemizedlist>
  </para>

  <para>
   If you are building from a <acronym>CVS</acronym> tree instead of
   using a released source package, or if you want to do server development,
   you also need the following packages:

   <itemizedlist>
    <listitem>
     <para>
      <indexterm>
       <primary>flex</primary>
      </indexterm>
      <indexterm>
       <primary>lex</primary>
      </indexterm>
      <indexterm>
       <primary>bison</primary>
      </indexterm>
      <indexterm>
       <primary>yacc</primary>
      </indexterm>

      GNU <application>Flex</> and <application>Bison</>
      are needed to build from a CVS checkout, or if you changed the actual
      scanner and parser definition files. If you need them, be sure
      to get <application>Flex</> 2.5.31 or later and
      <application>Bison</> 1.875 or later. Other <application>lex</>
      and <application>yacc</> programs cannot be used.
     </para>
    </listitem>
    <listitem>
     <para>
      <indexterm>
       <primary>perl</primary>
      </indexterm>

      <application>Perl</> 5.8 or later is needed to build from a CVS checkout,
      or if you changed the input files for any of the build steps that
      use Perl scripts.  If building on Windows you will need
      <application>Perl</> in any case.
     </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="http://www.gnu.org/order/ftp.html"></>
   for a list) or at <ulink
   url="ftp://ftp.gnu.org/gnu/"></ulink>.
  </para>

  <para>
   Also check that you have sufficient disk space. You will need about
   100 MB for the source tree during compilation and about 20 MB for
   the installation directory. An empty database cluster takes about
   35 MB; databases take about five times the amount of space that a
   flat text file with the same data would take. If you are going to
   run the regression tests you will temporarily need up to an extra
   150 MB. Use the <command>df</command> command to check free disk
   space.
  </para>
 </sect1>

<![%standalone-ignore;[
 <sect1 id="install-getsource">
  <title>Getting The Source</title>

  <para>
   The <productname>PostgreSQL</> &version; sources can be obtained by
   anonymous FTP from <ulink
   url="ftp://ftp.postgresql.org/pub/source/v&version;/postgresql-&version;.tar.gz"></ulink>.
   Other download options can be found on our website:
   <ulink url="http://www.postgresql.org/download/"></ulink>. After you
   have obtained the file, unpack it:
<screen>
<userinput>gunzip postgresql-&version;.tar.gz</userinput>
<userinput>tar xf postgresql-&version;.tar</userinput>
</screen>
   This will create a directory
   <filename>postgresql-&version;</filename> under the current directory
   with the <productname>PostgreSQL</> sources.
   Change into that directory for the rest
   of the installation procedure.
  </para>

  <para>
   You can also get the source directly from the version control repository, see
   <xref linkend="cvs">.
  </para>
 </sect1>
]]>

 <sect1 id="install-upgrading">
  <title>Upgrading</title>

  <indexterm zone="install-upgrading">
   <primary>upgrading</primary>
  </indexterm>

  <para>
   These instructions assume that your existing installation is under the
   <filename>/usr/local/pgsql</> directory, and that the data area is in
   <filename>/usr/local/pgsql/data</>.  Substitute your paths
   appropriately.
  </para>

  <para>
   The internal data storage format typically changes in every major
   release of <productname>PostgreSQL</>. Therefore, if you are upgrading
   an existing installation that does not have a version number of
   <quote>&majorversion;.x</quote>, you must back up and restore your
   data.  If you are upgrading from <productname>PostgreSQL</>
   <quote>&majorversion;.x</quote>, the new version can use your current
   data files so you should skip the backup and restore steps below because
   they are unnecessary.
  </para>

  <procedure>
   <step>
    <para>
     If making a backup, make sure that your database is not being updated.
     This does not affect the integrity of the backup, but the changed
     data would of course not be included. If necessary, edit the
     permissions in the file <filename>/usr/local/pgsql/data/pg_hba.conf</>
     (or equivalent) to disallow access from everyone except you.
    </para>

    <para>
     <indexterm>
      <primary>pg_dumpall</primary>
      <secondary>use during upgrade</secondary>
     </indexterm>

     To back up your database installation, type:
<screen>
<userinput>pg_dumpall &gt; <replaceable>outputfile</></userinput>
</screen>
     If you need to preserve OIDs (such as when using them as
     foreign keys), then use the <option>-o</option> option when running
     <application>pg_dumpall</>.
    </para>

    <para>
     To make the backup, you can use the <application>pg_dumpall</application>
     command from the version you are currently running.  For best
     results, however, try to use the <application>pg_dumpall</application>
     command from <productname>PostgreSQL</productname> &version;,
     since this version contains bug fixes and improvements over older
     versions.  While this advice might seem idiosyncratic since you
     haven't installed the new version yet, it is advisable to follow
     it if you plan to install the new version in parallel with the
     old version.  In that case you can complete the installation
     normally and transfer the data later.  This will also decrease
     the downtime.
    </para>
   </step>

   <step>
    <para>
     Shut down the old server:
<screen>
<userinput>pg_ctl stop</>
</screen>
     On systems that have <productname>PostgreSQL</> started at boot time,
     there is probably a start-up file that will accomplish the same thing. For
     example, on a <systemitem class="osname">Red Hat Linux</> system one
     might find that this works:
<screen>
<userinput>/etc/rc.d/init.d/postgresql stop</userinput>
</screen>
    </para>
   </step>

   <step>
    <para>
     If restoring from backup, rename or delete the old installation
     directory.  It is a good idea to rename the directory, rather than
     delete it, in case you have trouble and need to revert to it.  Keep
     in mind the directory might consume significant disk space.  To rename
     the directory, use a command like this:
<screen>
<userinput>mv /usr/local/pgsql /usr/local/pgsql.old</>
</screen>
    </para>
   </step>

   <step>
    <para>
     Install the new version of <productname>PostgreSQL</productname> as
     outlined in <![%standalone-include[the next section.]]>
     <![%standalone-ignore[<xref linkend="install-procedure">.]]>
    </para>
   </step>

   <step>
    <para>
     Create a new database cluster if needed.  Remember that you must
     execute these commands while logged in to the special database user
     account (which you already have if you are upgrading).
<programlisting>
<userinput>/usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data</>
</programlisting>
    </para>
   </step>

   <step>
    <para>
     Restore your previous <filename>pg_hba.conf</> and any
     <filename>postgresql.conf</> modifications.
    </para>
   </step>

   <step>
    <para>
     Start the database server, again using the special database user
     account:
<programlisting>
<userinput>/usr/local/pgsql/bin/postgres -D /usr/local/pgsql/data</>
</programlisting>
    </para>
   </step>

   <step>
    <para>
     Finally, restore your data from backup with:
<screen>
<userinput>/usr/local/pgsql/bin/psql -d postgres -f <replaceable>outputfile</></userinput>
</screen>
     using the <emphasis>new</> <application>psql</>.
    </para>
   </step>
  </procedure>

  <para>
   Further discussion appears in
   <![%standalone-include[the documentation,]]>
   <![%standalone-ignore[<xref linkend="migration">,]]>
   including instructions on how the previous installation can continue
   running while the new installation is installed.
  </para>
 </sect1>


 <sect1 id="install-procedure">
  <title>Installation Procedure</title>

  <procedure>

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

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

   <para>
    The first step of the installation procedure is to configure the
    source tree for your system and choose the options you would like.
    This is done by running the <filename>configure</> script. For a
    default installation simply enter:
<screen>
<userinput>./configure</userinput>
</screen>
    This script will run a number of tests to determine values for various
    system dependent variables and detect any quirks of your
    operating system, and finally will create several files in the
    build tree to record what it found.  You can also run
    <filename>configure</filename> in a directory outside the source
    tree, if you want to keep the build directory separate.  This
    procedure is also called a
    <indexterm><primary>VPATH</primary></indexterm><firstterm>VPATH</firstterm>
    build.  Here's how:
<screen>
<userinput>mkdir build_dir</userinput>
<userinput>cd build_dir</userinput>
<userinput>/path/to/source/tree/configure [options go here]</userinput>
<userinput>gmake</userinput>
</screen>
   </para>

   <para>
    The default configuration will build the server and utilities, as
    well as all client applications and interfaces that require only a
    C compiler. All files will be installed under
    <filename>/usr/local/pgsql</> by default.
   </para>

   <para>
    You can customize the build and installation process by supplying one
    or more of the following command line options to
    <filename>configure</filename>:

     <variablelist>
      <varlistentry>
       <term><option>--prefix=<replaceable>PREFIX</></option></term>
       <listitem>
        <para>
         Install all files under the directory <replaceable>PREFIX</>
         instead of <filename>/usr/local/pgsql</filename>. The actual
         files will be installed into various subdirectories; no files
         will ever be installed directly into the
         <replaceable>PREFIX</> directory.
        </para>

        <para>
         If you have special needs, you can also customize the
         individual subdirectories with the following options. However,
         if you leave these with their defaults, the installation will be
         relocatable, meaning you can move the directory after
         installation. (The <literal>man</> and <literal>doc</>
         locations are not affected by this.)
        </para>

        <para>
         For relocatable installs, you might want to use
         <filename>configure</filename>'s <literal>--disable-rpath</>
         option.  Also, you will need to tell the operating system how
         to find the shared libraries.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--exec-prefix=<replaceable>EXEC-PREFIX</></option></term>
       <listitem>
        <para>
         You can install architecture-dependent files under a
         different prefix, <replaceable>EXEC-PREFIX</>, than what
         <replaceable>PREFIX</> was set to. This can be useful to
         share architecture-independent files between hosts. If you
         omit this, then <replaceable>EXEC-PREFIX</> is set equal to
         <replaceable>PREFIX</> and both architecture-dependent and
         independent files will be installed under the same tree,
         which is probably what you want.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--bindir=<replaceable>DIRECTORY</></option></term>
       <listitem>
        <para>
         Specifies the directory for executable programs. The default
         is <filename><replaceable>EXEC-PREFIX</>/bin</>, which
         normally means <filename>/usr/local/pgsql/bin</>.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--sysconfdir=<replaceable>DIRECTORY</></option></term>
       <listitem>
        <para>
         Sets the directory for various configuration files,
         <filename><replaceable>PREFIX</>/etc</> by default.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--libdir=<replaceable>DIRECTORY</></option></term>
       <listitem>
        <para>
         Sets the location to install libraries and dynamically loadable
         modules. The default is
         <filename><replaceable>EXEC-PREFIX</>/lib</>.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--includedir=<replaceable>DIRECTORY</></option></term>
       <listitem>
        <para>
         Sets the directory for installing C and C++ header files. The
         default is <filename><replaceable>PREFIX</>/include</>.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--datarootdir=<replaceable>DIRECTORY</></option></term>
       <listitem>
        <para>
         Sets the root directory for various types of read-only data
         files.  This only sets the default for some of the following
         options.  The default is
         <filename><replaceable>PREFIX</>/share</>.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--datadir=<replaceable>DIRECTORY</></option></term>
       <listitem>
        <para>
         Sets the directory for read-only data files used by the
         installed programs. The default is
         <filename><replaceable>DATAROOTDIR</></>. Note that this has
         nothing to do with where your database files will be placed.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--localedir=<replaceable>DIRECTORY</></option></term>
       <listitem>
        <para>
         Sets the directory for installing locale data, in particular
         message translation catalog files.  The default is
         <filename><replaceable>DATAROOTDIR</>/locale</>.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--mandir=<replaceable>DIRECTORY</></option></term>
       <listitem>
        <para>
         The man pages that come with <productname>PostgreSQL</> will be installed under
         this directory, in their respective
         <filename>man<replaceable>x</></> subdirectories.
         The default is <filename><replaceable>DATAROOTDIR</>/man</>.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--docdir=<replaceable>DIRECTORY</></option></term>
       <listitem>
        <para>
         Sets the root directory for installing documentation files,
         except <quote>man</> pages.  This only sets the default for
         the following options.  The default value for this option is
         <filename><replaceable>DATAROOTDIR</>/doc/postgresql</>.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--htmldir=<replaceable>DIRECTORY</></option></term>
       <listitem>
        <para>
         The HTML-formatted documentation for
         <productname>PostgreSQL</productname> will be installed under
         this directory.  The default is
         <filename><replaceable>DATAROOTDIR</></>.
        </para>
       </listitem>
      </varlistentry>
     </variablelist>

     <note>
      <para>
       Care has been taken to make it possible to install
       <productname>PostgreSQL</> into shared installation locations
       (such as <filename>/usr/local/include</filename>) without
       interfering with the namespace of the rest of the system. First,
       the string <quote><literal>/postgresql</literal></quote> is
       automatically appended to <varname>datadir</varname>,
       <varname>sysconfdir</varname>, and <varname>docdir</varname>,
       unless the fully expanded directory name already contains the
       string <quote><literal>postgres</></quote> or
       <quote><literal>pgsql</></quote>. For example, if you choose
       <filename>/usr/local</filename> as prefix, the documentation will
       be installed in <filename>/usr/local/doc/postgresql</filename>,
       but if the prefix is <filename>/opt/postgres</filename>, then it
       will be in <filename>/opt/postgres/doc</filename>. The public C
       header files of the client interfaces are installed into
       <varname>includedir</varname> and are namespace-clean. The
       internal header files and the server header files are installed
       into private directories under <varname>includedir</varname>. See
       the documentation of each interface for information about how to
       access its header files. Finally, a private subdirectory will
       also be created, if appropriate, under <varname>libdir</varname>
       for dynamically loadable modules.
      </para>
     </note>
    </para>

    <para>
     <variablelist>
      <varlistentry>
       <term><option>--with-includes=<replaceable>DIRECTORIES</></option></term>
       <listitem>
        <para>
         <replaceable>DIRECTORIES</> is a colon-separated list of
         directories that will be added to the list the compiler
         searches for header files. If you have optional packages
         (such as GNU <application>Readline</>) installed in a non-standard
         location,
         you have to use this option and probably also the corresponding
         <option>--with-libraries</> option.
        </para>
        <para>
         Example: <literal>--with-includes=/opt/gnu/include:/usr/sup/include</>.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-libraries=<replaceable>DIRECTORIES</></option></term>
       <listitem>
        <para>
         <replaceable>DIRECTORIES</> is a colon-separated list of
         directories to search for libraries. You will probably have
         to use this option (and the corresponding
         <option>--with-includes</> option) if you have packages
         installed in non-standard locations.
        </para>
        <para>
         Example: <literal>--with-libraries=/opt/gnu/lib:/usr/sup/lib</>.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--enable-nls<optional>=<replaceable>LANGUAGES</replaceable></optional></option></term>
       <listitem>
        <para>
         Enables Native Language Support (<acronym>NLS</acronym>),
         that is, the ability to display a program's messages in a
         language other than English.
         <replaceable>LANGUAGES</replaceable> is an optional space-separated
         list of codes of the languages that you want supported, for
         example <literal>--enable-nls='de fr'</>.  (The intersection
         between your list and the set of actually provided
         translations will be computed automatically.)  If you do not
         specify a list, then all available translations are
         installed.
        </para>

        <para>
         To use this option, you will need an implementation of the
         <application>Gettext</> API; see above.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-pgport=<replaceable>NUMBER</></option></term>
       <listitem>
        <para>
         Set <replaceable>NUMBER</> as the default port number for
         server and clients. The default is 5432. The port can always
         be changed later on, but if you specify it here then both
         server and clients will have the same default compiled in,
         which can be very convenient.  Usually the only good reason
         to select a non-default value is if you intend to run multiple
         <productname>PostgreSQL</> servers on the same machine.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-perl</option></term>
       <listitem>
        <para>
         Build the <application>PL/Perl</> server-side language.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-python</option></term>
       <listitem>
        <para>
         Build the <application>PL/Python</> server-side language.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-tcl</option></term>
       <listitem>
        <para>
         Build the <application>PL/Tcl</> server-side language.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-tclconfig=<replaceable>DIRECTORY</replaceable></option></term>
       <listitem>
        <para>
         Tcl installs the file <filename>tclConfig.sh</filename>, which
         contains configuration information needed to build modules
         interfacing to Tcl. This file is normally found automatically
         at a well-known location, but if you want to use a different
         version of Tcl you can specify the directory in which to look
         for it.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-gssapi</option></term>
       <listitem>
        <para>
         Build with support for GSSAPI authentication. On many
         systems, the GSSAPI (usually a part of the Kerberos installation)
         system is not installed in a location
         that is searched by default (e.g., <filename>/usr/include</>,
         <filename>/usr/lib</>), so you must use the options
         <option>--with-includes</> and <option>--with-libraries</> in
         addition to this option.  <filename>configure</> will check
         for the required header files and libraries to make sure that
         your GSSAPI installation is sufficient before proceeding.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-krb5</option></term>
       <listitem>
        <para>
         Build with support for Kerberos 5 authentication. On many
         systems, the Kerberos system is not installed in a location
         that is searched by default (e.g., <filename>/usr/include</>,
         <filename>/usr/lib</>), so you must use the options
         <option>--with-includes</> and <option>--with-libraries</> in
         addition to this option.  <filename>configure</> will check
         for the required header files and libraries to make sure that
         your Kerberos installation is sufficient before proceeding.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-krb-srvnam=<replaceable>NAME</></option></term>
       <listitem>
        <para>
         The default name of the Kerberos service principal (also used
         by GSSAPI).
         <literal>postgres</literal> is the default. There's usually no
         reason to change this unless you have a Windows environment,
         in which case it must be set to upper case
         <literal>POSTGRES</literal>.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <indexterm>
        <primary>OpenSSL</primary>
        <seealso>SSL</seealso>
       </indexterm>

       <term><option>--with-openssl</option></term>
       <listitem>
        <para>
         Build with support for <acronym>SSL</> (encrypted)
         connections. This requires the <productname>OpenSSL</>
         package to be installed.  <filename>configure</> will check
         for the required header files and libraries to make sure that
         your <productname>OpenSSL</> installation is sufficient
         before proceeding.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-pam</option></term>
       <listitem>
        <para>
         Build with <acronym>PAM</><indexterm><primary>PAM</></>
         (Pluggable Authentication Modules) support.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-ldap</option></term>
       <listitem>
        <para>
         Build with <acronym>LDAP</><indexterm><primary>LDAP</></>
         support for authentication and connection parameter lookup (see
         <![%standalone-include[the documentation about client authentication
         and libpq]]><![%standalone-ignore[<xref linkend="libpq-ldap"> and
         <xref linkend="auth-ldap">]]> for more information). On Unix,
         this requires the <productname>OpenLDAP</> package to be
         installed. On Windows, the default <productname>WinLDAP</>
         library is used.  <filename>configure</> will check for the required
         header files and libraries to make sure that your
         <productname>OpenLDAP</> installation is sufficient before
         proceeding.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--without-readline</option></term>
       <listitem>
        <para>
         Prevents use of the <application>Readline</> library
         (and <application>libedit</> as well).  This option disables
         command-line editing and history in
         <application>psql</application>, so it is not recommended.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-libedit-preferred</option></term>
       <listitem>
        <para>
         Favors the use of the BSD-licensed <application>libedit</> library
         rather than GPL-licensed <application>Readline</>.  This option
         is significant only if you have both libraries installed; the
         default in that case is to use <application>Readline</>.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-bonjour</option></term>
       <listitem>
        <para>
         Build with Bonjour support.  This requires Bonjour support
         in your operating system.  Recommended on Mac OS X.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-ossp-uuid</option></term>
       <listitem>
        <para>
         Use the <ulink url="http://www.ossp.org/pkg/lib/uuid/">OSSP UUID
         library</ulink> when building <filename>contrib/uuid-ossp</>.
         The library provides functions to generate
         UUIDs.<indexterm><primary>UUID</primary></indexterm>
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-libxml</option></term>
       <listitem>
        <para>
         Build with libxml (enables SQL/XML support).  Libxml version 2.6.23 or
         later is required for this feature.
        </para>

        <para>
         Libxml installs a program <command>xml2-config</command> that
         can be used to detect the required compiler and linker
         options.  PostgreSQL will use it automatically if found.  To
         specify a libxml installation at an unusual location, you can
         either set the environment variable
         <envar>XML2_CONFIG</envar> to point to the
         <command>xml2-config</command> program belonging to the
         installation, or use the options
         <option>--with-includes</option> and
         <option>--with-libraries</option>.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-libxslt</option></term>
       <listitem>
        <para>
         Use libxslt when building <filename>contrib/xml2</>.
         <filename>contrib/xml2</> relies on this library to perform
         XSL transformations of XML.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--disable-integer-datetimes</option></term>
       <listitem>
        <para>
         Disable support for 64-bit integer storage for timestamps and
         intervals, and store datetime values as floating-point
         numbers instead. Floating-point datetime storage was the
         default in <productname>PostgreSQL</productname> releases
         prior to 8.4, but it is now deprecated, because it does not
         support microsecond precision for the full range of
         <type>timestamp</type> values. However, integer-based
         datetime storage requires a 64-bit integer type. Therefore,
         this option can be used when no such type is available, or
         for compatibility with applications written for prior
         versions of <productname>PostgreSQL</productname>. See
         <![%standalone-include[the documentation about datetime datatypes]]>
         <![%standalone-ignore[<xref linkend="datatype-datetime">]]>
         for more information.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--disable-float4-byval</option></term>
       <listitem>
        <para>
         Disable passing float4 values <quote>by value</>, causing them
         to be passed <quote>by reference</> instead.  This option costs
         performance, but may be needed for compatibility with old
         user-defined functions that are written in C and use the
         <quote>version 0</> calling convention.  A better long-term
         solution is to update any such functions to use the
         <quote>version 1</> calling convention.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--disable-float8-byval</option></term>
       <listitem>
        <para>
         Disable passing float8 values <quote>by value</>, causing them
         to be passed <quote>by reference</> instead.  This option costs
         performance, but may be needed for compatibility with old
         user-defined functions that are written in C and use the
         <quote>version 0</> calling convention.  A better long-term
         solution is to update any such functions to use the
         <quote>version 1</> calling convention.
         Note that this option affects not only float8, but also int8 and some
         related types such as timestamp.
         On 32-bit platforms, <option>--disable-float8-byval</> is the default
         and it is not allowed to select <option>--enable-float8-byval</>.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-segsize=<replaceable>SEGSIZE</replaceable></option></term>
       <listitem>
        <para>
         Set the <firstterm>segment size</>, in gigabytes.  Large tables are
         divided into multiple operating-system files, each of size equal
         to the segment size.  This avoids problems with file size limits
         that exist on many platforms.  The default segment size, 1 gigabyte,
         is safe on all supported platforms.  If your operating system has
         <quote>largefile</> support (which most do, nowadays), you can use
         a larger segment size.  This can be helpful to reduce the number of
         file descriptors consumed when working with very large tables.
         But be careful not to select a value larger than is supported
         by your platform and the file systems you intend to use.  Other
         tools you might wish to use, such as <application>tar</>, could
         also set limits on the usable file size.
         It is recommended, though not absolutely required, that this value
         be a power of 2.
         Note that changing this value requires an initdb.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-blocksize=<replaceable>BLOCKSIZE</replaceable></option></term>
       <listitem>
        <para>
         Set the <firstterm>block size</>, in kilobytes.  This is the unit
         of storage and I/O within tables.  The default, 8 kilobytes,
         is suitable for most situations; but other values may be useful
         in special cases.
         The value must be a power of 2 between 1 and 32 (kilobytes).
         Note that changing this value requires an initdb.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-wal-segsize=<replaceable>SEGSIZE</replaceable></option></term>
       <listitem>
        <para>
         Set the <firstterm>WAL segment size</>, in megabytes.  This is
         the size of each individual file in the WAL log.  It may be useful
         to adjust this size to control the granularity of WAL log shipping.
         The default size is 16 megabytes.
         The value must be a power of 2 between 1 and 64 (megabytes).
         Note that changing this value requires an initdb.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-wal-blocksize=<replaceable>BLOCKSIZE</replaceable></option></term>
       <listitem>
        <para>
         Set the <firstterm>WAL block size</>, in kilobytes.  This is the unit
         of storage and I/O within the WAL log.  The default, 8 kilobytes,
         is suitable for most situations; but other values may be useful
         in special cases.
         The value must be a power of 2 between 1 and 64 (kilobytes).
         Note that changing this value requires an initdb.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--disable-spinlocks</option></term>
       <listitem>
        <para>
         Allow the build to succeed even if <productname>PostgreSQL</>
         has no CPU spinlock support for the platform.  The lack of
         spinlock support will result in poor performance; therefore,
         this option should only be used if the build aborts and
         informs you that the platform lacks spinlock support. If this
         option is required to build <productname>PostgreSQL</> on
         your platform, please report the problem to the
         <productname>PostgreSQL</> developers.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--disable-thread-safety</option></term>
       <listitem>
        <para>
         Disable the thread-safety of client libraries.  This prevents
         concurrent threads in <application>libpq</application> and
         <application>ECPG</application> programs from safely controlling
         their private connection handles.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--with-system-tzdata=<replaceable>DIRECTORY</replaceable></option></term>
       <indexterm>
        <primary>time zone data</primary>
       </indexterm>
       <listitem>
        <para>
         <productname>PostgreSQL</> includes its own time zone database,
         which it requires for date and time operations.  This time zone
         database is in fact compatible with the <quote>zoneinfo</> time zone
         database provided by many operating systems such as FreeBSD,
         Linux, and Solaris, so it would be redundant to install it again.
         When this option is used, the system-supplied time zone database
         in <replaceable>DIRECTORY</replaceable> is used instead of the one
         included in the PostgreSQL source distribution.
         <replaceable>DIRECTORY</replaceable> must be specified as an
         absolute path.  <filename>/usr/share/zoneinfo</filename> is a
         likely directory on some operating systems.  Note that the
         installation routine will not detect mismatching or erroneous time
         zone data.  If you use this option, you are advised to run the
         regression tests to verify that the time zone data you have
         pointed to works correctly with <productname>PostgreSQL</>.
        </para>

        <para>
         This option is mainly aimed at binary package distributors
         who know their target operating system well.  The main
         advantage of using this option is that the PostgreSQL package
         won't need to be upgraded whenever any of the many local
         daylight-saving time rules change.  Another advantage is that
         PostgreSQL can be cross-compiled<indexterm><primary>cross
         compilation</primary></indexterm> more straightforwardly if the
         time zone database files do not need to be built during the
         installation.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--without-zlib</option></term>
       <listitem>
        <para>
         <indexterm>
          <primary>zlib</primary>
         </indexterm>
         Prevents use of the <application>Zlib</> library.  This disables
         support for compressed archives in <application>pg_dump</application>
         and <application>pg_restore</application>.
         This option is only intended for those rare systems where this
         library is not available.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--enable-debug</option></term>
       <listitem>
        <para>
         Compiles all programs and libraries with debugging symbols.
         This means that you can run the programs in a debugger
         to analyze problems. This enlarges the size of the installed
         executables considerably, and on non-GCC compilers it usually
         also disables compiler optimization, causing slowdowns. However,
         having the symbols available is extremely helpful for dealing
         with any problems that might arise.  Currently, this option is
         recommended for production installations only if you use GCC.
         But you should always have it on if you are doing development work
         or running a beta version.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--enable-coverage</option></term>
       <listitem>
        <para>
         If using GCC, all programs and libraries are compiled with
         code coverage testing instrumentation.  When run, they
         generate files in the build directory with code coverage
         metrics.
         <![%standalone-ignore[See <xref linkend="regress-coverage">
         for more information.]]> This option is for use only with GCC
         and when doing development work.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--enable-profiling</option></term>
       <listitem>
        <para>
         If using GCC, all programs and libraries are compiled so they
         can be profiled.  On backend exit, a subdirectory will be created
         that contains the <filename>gmon.out</> file for use in profiling.
         This option is for use only with GCC and when doing development work.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--enable-cassert</option></term>
       <listitem>
        <para>
         Enables <firstterm>assertion</> checks in the server, which test for
         many <quote>cannot happen</> conditions.  This is invaluable for
         code development purposes, but the tests can slow down the
         server significantly.
         Also, having the tests turned on won't necessarily enhance the
         stability of your server!  The assertion checks are not categorized
         for severity, and so what might be a relatively harmless bug will
         still lead to server restarts if it triggers an assertion
         failure.  This option is not recommended for production use, but
         you should have it on for development work or when running a beta
         version.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--enable-depend</option></term>
       <listitem>
        <para>
         Enables automatic dependency tracking.  With this option, the
         makefiles are set up so that all affected object files will
         be rebuilt when any header file is changed.  This is useful
         if you are doing development work, but is just wasted overhead
         if you intend only to compile once and install.  At present,
         this option only works with GCC.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><option>--enable-dtrace</option></term>
       <listitem>
        <para>
         <indexterm>
          <primary>DTrace</primary>
         </indexterm>
         Compiles <productname>PostgreSQL</productname> with support for the
         dynamic tracing tool DTrace.
         <![%standalone-ignore[See <xref linkend="dynamic-trace">
         for more information.]]>
        </para>

        <para>
         To point to the <command>dtrace</command> program, the
         environment variable <envar>DTRACE</envar> can be set.  This
         will often be necessary because <command>dtrace</command> is
         typically installed under <filename>/usr/sbin</filename>,
         which might not be in the path.
        </para>

        <para>
         Extra command-line options for the <command>dtrace</command> program
         can be specified in the environment variable
         <envar>DTRACEFLAGS</envar>.  On Solaris,
         to include DTrace support in a 64-bit binary, you must specify
         <literal>DTRACEFLAGS="-64"</> to configure.  For example,
         using the GCC compiler:
<screen>
./configure CC='gcc -m64' --enable-dtrace DTRACEFLAGS='-64' ...
</screen>
         Using Sun's compiler:
<screen>
./configure CC='/opt/SUNWspro/bin/cc -xtarget=native64' --enable-dtrace DTRACEFLAGS='-64' ...
</screen>
        </para>
       </listitem>
      </varlistentry>

     </variablelist>
    </para>

    <para>
     If you prefer a C compiler different from the one
     <filename>configure</filename> picks, you can set the
     environment variable <envar>CC</> to the program of your choice.
     By default, <filename>configure</filename> will pick
     <filename>gcc</filename> if available, else the platform's
     default (usually <filename>cc</>).  Similarly, you can override the
     default compiler flags if needed with the <envar>CFLAGS</envar> variable.
    </para>

    <para>
     You can specify environment variables on the
     <filename>configure</filename> command line, for example:
<screen>
<userinput>./configure CC=/opt/bin/gcc CFLAGS='-O2 -pipe'</>
</screen>
    </para>

    <para>
     Here is a list of the significant variables that can be set in
     this manner:

     <variablelist>
      <varlistentry>
       <term><envar>BISON</envar></term>
       <listitem>
        <para>
         Bison program
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>CC</envar></term>
       <listitem>
        <para>
         C compiler
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>CFLAGS</envar></term>
       <listitem>
        <para>
         options to pass to the C compiler
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>CPP</envar></term>
       <listitem>
        <para>
         C preprocessor
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>CPPFLAGS</envar></term>
       <listitem>
        <para>
         options to pass to the C preprocessor
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>DTRACE</envar></term>
       <listitem>
        <para>
         location of the <command>dtrace</command> program
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>DTRACEFLAGS</envar></term>
       <listitem>
        <para>
         options to pass to the <command>dtrace</command> program
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>FLEX</envar></term>
       <listitem>
        <para>
         Flex program
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>LDFLAGS</envar></term>
       <listitem>
        <para>
         options to pass to the link editor
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>LDFLAGS_SL</envar></term>
       <listitem>
        <para>
         linker options for shared library linking
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>MSGFMT</envar></term>
       <listitem>
        <para>
         <command>msgfmt</command> program for native language support
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>PERL</envar></term>
       <listitem>
        <para>
         Full path to the Perl interpreter.  This will be used to
         determine the dependencies for building PL/Perl.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>PYTHON</envar></term>
       <listitem>
        <para>
         Full path to the Python interpreter.  This will be used to
         determine the dependencies for building PL/Python.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>TCLSH</envar></term>
       <listitem>
        <para>
         Full path to the Tcl interpreter.  This will be used to
         determine the dependencies for building PL/Tcl, and it will
         be substituted into Tcl scripts.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term><envar>XML2_CONFIG</envar></term>
       <listitem>
        <para>
         <command>xml2-config</command> program used to locate the
         libxml installation.
        </para>
       </listitem>
      </varlistentry>
     </variablelist>
    </para>
   </step>

  <step id="build">
   <title>Build</title>

   <para>
    To start the build, type:
<screen>
<userinput>gmake</userinput>
</screen>
    (Remember to use <acronym>GNU</> <application>make</>.) The build
    will take a few minutes depending on your
    hardware. The last line displayed should be:
<screen>
All of PostgreSQL is successfully made. Ready to install.
</screen>
   </para>

  <para>
   If you want to build everything that can be built, including the
   documentation (HTML and man pages), and the additional modules
   (<filename>contrib</filename>), type instead:
<screen>
<userinput>gmake world</userinput>
</screen>
   The last line displayed should be:
<screen>
PostgreSQL, contrib and HTML documentation successfully made. Ready to install.
</screen>
   </para>
  </step>

  <step>
   <title>Regression Tests</title>

   <indexterm>
    <primary>regression test</primary>
   </indexterm>

   <para>
    If you want to test the newly built server before you install it,
    you can run the regression tests at this point. The regression
    tests are a test suite to verify that <productname>PostgreSQL</>
    runs on your machine in the way the developers expected it
    to. Type:
<screen>
<userinput>gmake check</userinput>
</screen>
    (This won't work as root; do it as an unprivileged user.)
    <![%standalone-include[The file
    <filename>src/test/regress/README</> and the
    documentation contain]]>
    <![%standalone-ignore[<xref linkend="regress"> contains]]>
    detailed information about interpreting the test results. You can
    repeat this test at any later time by issuing the same command.
   </para>
  </step>

  <step id="install">
   <title>Installing the Files</title>

   <note>
    <para>
     If you are upgrading an existing system and are going to install
     the new files over the old ones, be sure to back up
     your data and shut down the old server before proceeding, as explained in
     <xref linkend="install-upgrading"> above.
    </para>
   </note>

   <para>
    To install <productname>PostgreSQL</> enter:
<screen>
<userinput>gmake install</userinput>
</screen>
    This will install files into the directories that were specified
    in <xref linkend="configure">. Make sure that you have appropriate
    permissions to write into that area. Normally you need to do this
    step as root. Alternatively, you can create the target
    directories in advance and arrange for appropriate permissions to
    be granted.
   </para>

   <para>
    To install the documentation (HTML and man pages), enter:
<screen>
<userinput>gmake install-docs</userinput>
</screen>
   </para>

   <para>
    If you built the world above, type instead:
<screen>
<userinput>gmake install-world</userinput>
</screen>
    This also installs the documentation.
   </para>

   <para>
    You can use <literal>gmake install-strip</literal> instead of
    <literal>gmake install</literal> to strip the executable files and
    libraries as they are installed.  This will save some space.  If
    you built with debugging support, stripping will effectively
    remove the debugging support, so it should only be done if
    debugging is no longer needed.  <literal>install-strip</literal>
    tries to do a reasonable job saving space, but it does not have
    perfect knowledge of how to strip every unneeded byte from an
    executable file, so if you want to save all the disk space you
    possibly can, you will have to do manual work.
   </para>

   <para>
    The standard installation provides all the header files needed for client
    application development as well as for server-side program
    development, such as custom functions or data types written in C.
    (Prior to <productname>PostgreSQL</> 8.0, a separate <literal>gmake
    install-all-headers</> command was needed for the latter, but this
    step has been folded into the standard install.)
   </para>

   <formalpara>
    <title>Client-only installation:</title>
    <para>
     If you want to install only the client applications and
     interface libraries, then you can use these commands:
<screen>
<userinput>gmake -C src/bin install</>
<userinput>gmake -C src/include install</>
<userinput>gmake -C src/interfaces install</>
<userinput>gmake -C doc install</>
</screen>
    <filename>src/bin</> has a few binaries for server-only use,
    but they are small.
    </para>
   </formalpara>
  </step>
  </procedure>

  <formalpara>
   <title>Registering <application>eventlog</> on <systemitem
   class="osname">Windows</>:</title>
   <para>
    To register a <systemitem class="osname">Windows</> <application>eventlog</>
    library with the operating system, issue this command after installation:
<screen>
<userinput>regsvr32 <replaceable>pgsql_library_directory</>/pgevent.dll</>
</screen>
    This creates registry entries used by the event viewer.
   </para>
  </formalpara>

  <formalpara>
   <title>Uninstallation:</title>
   <para>
    To undo the installation use the command <command>gmake
    uninstall</>. However, this will not remove any created directories.
   </para>
  </formalpara>

  <formalpara>
   <title>Cleaning:</title>

   <para>
    After the installation you can free disk space by removing the built
    files from the source tree with the command <command>gmake
    clean</>. This will preserve the files made by the <command>configure</command>
    program, so that you can rebuild everything with <command>gmake</>
    later on. To reset the source tree to the state in which it was
    distributed, use <command>gmake distclean</>. If you are going to
    build for several platforms within the same source tree you must do
    this and re-configure for each platform.  (Alternatively, use
    a separate build tree for each platform, so that the source tree
    remains unmodified.)
   </para>
  </formalpara>

  <para>
   If you perform a build and then discover that your <command>configure</>
   options were wrong, or if you change anything that <command>configure</>
   investigates (for example, software upgrades), then it's a good
   idea to do <command>gmake distclean</> before reconfiguring and
   rebuilding.  Without this, your changes in configuration choices
   might not propagate everywhere they need to.
  </para>
 </sect1>

 <sect1 id="install-post">
  <title>Post-Installation Setup</title>

  <sect2>
   <title>Shared Libraries</title>

   <indexterm>
    <primary>shared library</primary>
   </indexterm>

   <para>
    On some systems with shared libraries
    you need to tell the system how to find the newly installed
    shared libraries.  The systems on which this is
    <emphasis>not</emphasis> necessary include <systemitem
    class="osname">BSD/OS</>, <systemitem class="osname">FreeBSD</>,
    <systemitem class="osname">HP-UX</>, <systemitem
    class="osname">IRIX</>, <systemitem class="osname">Linux</>,
    <systemitem class="osname">NetBSD</>, <systemitem
    class="osname">OpenBSD</>, <systemitem class="osname">Tru64
    UNIX</> (formerly <systemitem class="osname">Digital UNIX</>), and
    <systemitem class="osname">Solaris</>.
   </para>

   <para>
    The method to set the shared library search path varies between
    platforms, but the most widely-used method is to set the
    environment variable <envar>LD_LIBRARY_PATH</> like so: In Bourne
    shells (<command>sh</>, <command>ksh</>, <command>bash</>, <command>zsh</>):
<programlisting>
LD_LIBRARY_PATH=/usr/local/pgsql/lib
export LD_LIBRARY_PATH
</programlisting>
    or in <command>csh</> or <command>tcsh</>:
<programlisting>
setenv LD_LIBRARY_PATH /usr/local/pgsql/lib
</programlisting>
    Replace <literal>/usr/local/pgsql/lib</> with whatever you set
    <option><literal>--libdir</></> to in <xref linkend="configure">.
    You should put these commands into a shell start-up file such as
    <filename>/etc/profile</> or <filename>~/.bash_profile</>.  Some
    good information about the caveats associated with this method can
    be found at <ulink
    url="http://xahlee.org/UnixResource_dir/_/ldpath.html"></ulink>.
   </para>

   <para>
    On some systems it might be preferable to set the environment
    variable <envar>LD_RUN_PATH</envar> <emphasis>before</emphasis>
    building.
   </para>

   <para>
    On <systemitem class="osname">Cygwin</systemitem>, put the library
    directory in the <envar>PATH</envar> or move the
    <filename>.dll</filename> files into the <filename>bin</filename>
    directory.
   </para>

   <para>
    If in doubt, refer to the manual pages of your system (perhaps
    <command>ld.so</command> or <command>rld</command>). If you later
    get a message like:
<screen>
psql: error in loading shared libraries
libpq.so.2.1: cannot open shared object file: No such file or directory
</screen>
    then this step was necessary.  Simply take care of it then.
   </para>

   <para>
    <indexterm>
     <primary>ldconfig</primary>
    </indexterm>
    If you are on <systemitem class="osname">BSD/OS</>, <systemitem
    class="osname">Linux</>, or <systemitem class="osname">SunOS 4</>
    and you have root access you can run:
<programlisting>
/sbin/ldconfig /usr/local/pgsql/lib
</programlisting>
    (or equivalent directory) after installation to enable the
    run-time linker to find the shared libraries faster.  Refer to the
    manual page of <command>ldconfig</> for more information.  On
    <systemitem class="osname">FreeBSD</>, <systemitem
    class="osname">NetBSD</>, and <systemitem
    class="osname">OpenBSD</> the command is:
<programlisting>
/sbin/ldconfig -m /usr/local/pgsql/lib
</programlisting>
    instead.  Other systems are not known to have an equivalent
    command.
   </para>
  </sect2>

  <sect2>
   <title>Environment Variables</title>

   <indexterm>
    <primary><envar>PATH</envar></primary>
   </indexterm>

   <para>
    If you installed into <filename>/usr/local/pgsql</> or some other
    location that is not searched for programs by default, you should
    add <filename>/usr/local/pgsql/bin</> (or whatever you set
    <option><literal>--bindir</></> to in <xref linkend="configure">)
    into your <envar>PATH</>.  Strictly speaking, this is not
    necessary, but it will make the use of <productname>PostgreSQL</>
    much more convenient.
   </para>

   <para>
    To do this, add the following to your shell start-up file, such as
    <filename>~/.bash_profile</> (or <filename>/etc/profile</>, if you
    want it to affect all users):
<programlisting>
PATH=/usr/local/pgsql/bin:$PATH
export PATH
</programlisting>
    If you are using <command>csh</> or <command>tcsh</>, then use this command:
<programlisting>
set path = ( /usr/local/pgsql/bin $path )
</programlisting>
   </para>

   <para>
    <indexterm>
     <primary><envar>MANPATH</envar></primary>
    </indexterm>
    To enable your system to find the <application>man</>
    documentation, you need to add lines like the following to a
    shell start-up file unless you installed into a location that is
    searched by default:
<programlisting>
MANPATH=/usr/local/pgsql/man:$MANPATH
export MANPATH
</programlisting>
   </para>

   <para>
    The environment variables <envar>PGHOST</> and <envar>PGPORT</>
    specify to client applications the host and port of the database
    server, overriding the compiled-in defaults. If you are going to
    run client applications remotely then it is convenient if every
    user that plans to use the database sets <envar>PGHOST</>.  This
    is not required, however; the settings can be communicated via command
    line options to most client programs.
   </para>
  </sect2>
 </sect1>


<![%standalone-include;[
 <sect1 id="install-getting-started">
  <title>Getting Started</title>

  <para>
   The following is a quick summary of how to get <productname>PostgreSQL</> up and
   running once installed. The main documentation contains more information.
  </para>

  <procedure>
   <step>
    <para>
     Create a user account for the <productname>PostgreSQL</>
     server. This is the user the server will run as. For production
     use you should create a separate, unprivileged account
     (<quote>postgres</> is commonly used). If you do not have root
     access or just want to play around, your own user account is
     enough, but running the server as root is a security risk and
     will not work.
<screen>
<userinput>adduser postgres</>
</screen>
    </para>
   </step>

   <step>
    <para>
     Create a database installation with the <command>initdb</>
     command. To run <command>initdb</> you must be logged in to your
     <productname>PostgreSQL</> server account. It will not work as
     root.
<screen>
root# <userinput>mkdir /usr/local/pgsql/data</>
root# <userinput>chown postgres /usr/local/pgsql/data</>
root# <userinput>su - postgres</>
postgres$ <userinput>/usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data</>
</screen>
    </para>

    <para>
     The <option>-D</> option specifies the location where the data
     will be stored. You can use any path you want, it does not have
     to be under the installation directory. Just make sure that the
     server account can write to the directory (or create it, if it
     doesn't already exist) before starting <command>initdb</>, as
     illustrated here.
    </para>
   </step>

   <step>
    <para>
     At this point, if you did not use the <command>initdb</> <literal>-A</>
     option, you might want to modify <filename>pg_hba.conf</> to control
     local access to the server before you start it.  The default is to
     trust all local users.
    </para>
   </step>

   <step>
    <para>
     The previous <command>initdb</> step should have told you how to
     start up the database server. Do so now. The command should look
     something like:
<programlisting>
/usr/local/pgsql/bin/postgres -D /usr/local/pgsql/data
</programlisting>
     This will start the server in the foreground. To put the server
     in the background use something like:
<programlisting>
nohup /usr/local/pgsql/bin/postgres -D /usr/local/pgsql/data \
    &lt;/dev/null &gt;&gt;server.log 2&gt;&amp;1 &lt;/dev/null &amp;
</programlisting>
    </para>

    <para>
     To stop a server running in the background you can type:
<programlisting>
kill `cat /usr/local/pgsql/data/postmaster.pid`
</programlisting>
    </para>
   </step>

   <step>
    <para>
     Create a database:
<screen>
<userinput>createdb testdb</>
</screen>
     Then enter:
<screen>
<userinput>psql testdb</>
</screen>
     to connect to that database. At the prompt you can enter SQL
     commands and start experimenting.
    </para>
   </step>
  </procedure>
 </sect1>

 <sect1 id="install-whatnow">
  <title>What Now?</title>

  <para>
   <itemizedlist>
    <listitem>
     <para>
      The <productname>PostgreSQL</> distribution contains a
      comprehensive documentation set, which you should read sometime.
      After installation, the documentation can be accessed by
      pointing your browser to
      <filename>/usr/local/pgsql/doc/html/index.html</>, unless you
      changed the installation directories.
     </para>

     <para>
      The first few chapters of the main documentation are the Tutorial,
      which should be your first reading if you are completely new to
      <acronym>SQL</> databases.  If you are familiar with database
      concepts then you want to proceed with part on server
      administration, which contains information about how to set up
      the database server, database users, and authentication.
     </para>
    </listitem>

    <listitem>
     <para>
      Usually, you will want to modify your computer so that it will
      automatically start the database server whenever it boots. Some
      suggestions for this are in the documentation.
     </para>
    </listitem>

    <listitem>
     <para>
      Run the regression tests against the installed server (using
      <command>gmake installcheck</command>). If you didn't run the
      tests before installation, you should definitely do it now. This
      is also explained in the documentation.
     </para>
    </listitem>

    <listitem>
     <para>
      By default, <productname>PostgreSQL</> is configured to run on
      minimal hardware.  This allows it to start up with almost any
      hardware configuration. The default configuration is, however,
      not designed for optimum performance. To achieve optimum
      performance, several server parameters must be adjusted, the two
      most common being <varname>shared_buffers</varname> and
      <varname>work_mem</varname>.
      Other parameters mentioned in the documentation also affect
      performance.
     </para>
    </listitem>
   </itemizedlist>
  </para>
 </sect1>
]]>


 <sect1 id="supported-platforms">
  <title>Supported Platforms</title>

  <para>
   A platform (that is, a CPU architecture and operating system combination)
   is considered supported by the <productname>PostgreSQL</> development
   community if the code contains provisions to work on that platform and
   it has recently been verified to build and pass its regression tests
   on that platform.  Currently, most testing of platform compatibility
   is done automatically by test machines in the
   <ulink url="http://buildfarm.postgresql.org/">PostgreSQL Build Farm</ulink>.
   If you are interested in using <productname>PostgreSQL</> on a platform
   that is not represented in the build farm, but on which the code works
   or can be made to work, you are strongly encouraged to set up a build
   farm member machine so that continued compatibility can be assured.
  </para>

  <para>
   In general, <productname>PostgreSQL</> can be expected to work on
   these CPU architectures: x86, x86_64, IA64, PowerPC,
   PowerPC 64, S/390, S/390x, Sparc, Sparc 64, Alpha, ARM, MIPS, MIPSEL, M68K,
   and PA-RISC.  Code support exists for M32R, NS32K, and VAX, but these
   architectures are not known to have been tested recently.  It is often
   possible to build on an unsupported CPU type by configuring with
   <option>--disable-spinlocks</option>, but performance will be poor.
  </para>

  <para>
   <productname>PostgreSQL</> can be expected to work on these operating
   systems: Linux (all recent distributions), Windows (Win2000 SP4 and later),
   FreeBSD, OpenBSD, NetBSD, Mac OS X, AIX, HP/UX, IRIX, Solaris, Tru64 Unix,
   and UnixWare.  Other Unix-like systems may also work but are not currently
   being tested.  In most cases, all CPU architectures supported by
   a given operating system will work.  Look in
   the <xref linkend="installation-platform-notes"> below to see if
   there is information
   specific to your operating system, particularly if using an older system.
  </para>

  <para>
   If you have installation problems on a platform that is known
   to be supported according to recent build farm results, please report
   it to <email>pgsql-bugs@postgresql.org</email>.  If you are interested
   in porting <productname>PostgreSQL</> to a new platform,
   <email>pgsql-hackers@postgresql.org</email> is the appropriate place
   to discuss that.
  </para>
 </sect1>

 <sect1 id="installation-platform-notes">
  <title>Platform-Specific Notes</title>

  <para>
   This section documents additional platform-specific issues
   regarding the installation and setup of PostgreSQL.  Be sure to
   read the installation instructions, and in
   particular <xref linkend="install-requirements"> as well.  Also,
   check <![%standalone-include[the
   file <filename>src/test/regress/README</> and the documentation]]>
   <![%standalone-ignore[<xref linkend="regress">]]> regarding the
   interpretation of regression test results.
  </para>

  <para>
   Platforms that are not covered here have no known platform-specific
   installation issues.
  </para>

  <sect2 id="installation-notes-aix">
   <title>AIX</title>

   <indexterm zone="installation-notes-aix">
    <primary>AIX</primary>
    <secondary>installation on</secondary>
   </indexterm>

   <para>
    PostgreSQL works on AIX, but getting it installed properly can be
    challenging.  AIX versions from 4.3.3 to 6.1 are considered supported.
    You can use GCC or the native IBM compiler xlc.  In
    general, using recent versions of AIX and PostgreSQL helps.  Check
    the build farm for up to date information about which versions of
    AIX are known to work.
   </para>

   <para>
    Use the following <command>configure</command> flags in addition
    to your own if you have installed Readline or libz
    there: <literal>--with-includes=/usr/local/include
    --with-libraries=/usr/local/lib</literal>.
   </para>

   <para>
    If you don't have a PowerPC or use GCC you might see rounding
    differences in the geometry regression test.  There will probably
    be warnings about 0.0/0.0 division and duplicate symbols which you
    can safely ignore.
   </para>

   <para>
    Some of the AIX tools may be <quote>a little different</quote>
    from what you may be accustomed to on other platforms.  If you are
    looking for a version of <command>ldd</command>, useful for
    determining what object code depends on what libraries, the
    following URLs may help you:
    <ulink url="http://www.faqs.org/faqs/aix-faq/part4/section-22.html"></ulink>,
    <ulink url="http://www.han.de/~jum/aix/ldd.c"></ulink>.
   </para>

   <para>
    <xref linkend="AIX-fixlevels"> shows the minimum recommended fix levels
    for various AIX versions.  To check your current fix level, use
    <command>oslevel -r</command> in AIX 4.3.3 to AIX 5.2 ML 7, or
    <command>oslevel -s</command> in later versions.
   </para>

   <table id="AIX-fixlevels">
    <title>
     Minimum recommended <systemitem class="osname">AIX</systemitem> fix levels
    </title>

    <tgroup cols="2">
     <thead>
      <row>
       <entry>AIX version</entry>
       <entry>fix level</entry>
      </row>
     </thead>

     <tbody>
      <row>
       <entry>AIX 4.3.3</entry>
       <entry>Maintenance Level 11 + post ML11 bundle</entry>
      </row>

      <row>
       <entry>AIX 5.1</entry>
       <entry>Maintenance Level 9 + post ML9 bundle</entry>
      </row>

      <row>
       <entry>AIX 5.2</entry>
       <entry>Technology Level 10 Service Pack 3</entry>
      </row>

      <row>
       <entry>AIX 5.3</entry>
       <entry>Technology Level 7</entry>
      </row>

      <row>
       <entry>AIX 6.1</entry>
       <entry>Base Level</entry>
      </row>
     </tbody>
    </tgroup>
   </table>

   <sect3>
    <title>GCC issues</title>

    <para>
     On AIX 5.3, there have been some problems getting PostgreSQL to
     compile and run using GCC.
    </para>

    <para>
     You will want to use a version of GCC subsequent to 3.3.2,
     particularly if you use a prepackaged version.  We had good
     success with 4.0.1.  Problems with earlier versions seem to have
     more to do with the way IBM packaged GCC than with actual issues
     with GCC, so that if you compile GCC yourself, you might well
     have success with an earlier version of GCC.
    </para>
   </sect3>

   <sect3>
    <title>Unix-domain sockets broken</title>

    <para>
     AIX 5.3 has a problem
     where <structname>sockaddr_storage</structname> is not defined to
     be large enough.  In version 5.3, IBM increased the size of
     <structname>sockaddr_un</structname>, the address structure for
     Unix-domain sockets, but did not correspondingly increase the
     size of <structname>sockaddr_storage</structname>.  The result of
     this is that attempts to use Unix-domain sockets with PostgreSQL
     lead to libpq overflowing the data structure.  TCP/IP connections
     work OK, but not Unix-domain sockets, which prevents the
     regression tests from working.
    </para>

    <para>
     The problem was reported to IBM, and is recorded as bug report
     PMR29657.  If you upgrade to maintenance level 5300-03 or later,
     that will include this fix.  A quick workaround
     is to alter <symbol>_SS_MAXSIZE</symbol> to 1025 in
     <filename>/usr/include/sys/socket.h</filename>.  In either case,
     recompile PostgreSQL once you have the corrected header file.
    </para>
   </sect3>

   <sect3>
    <title>Internet address issues</title>

    <para>
     PostgreSQL relies on the system's <function>getaddrinfo</> function
     to parse IP addresses in <varname>listen_addresses</>,
     <filename>pg_hba.conf</>, etc.  Older versions of AIX have assorted
     bugs in this function.  If you have problems related to these settings,
     updating to the appropriate fix level shown in <xref
     linkend="AIX-fixlevels"> should take care of it.
    </para>

    <!-- http://archives.postgresql.org/message-id/6064jt6cfm.fsf_-_@dba2.int.libertyrms.com -->

    <para>
     One user reports:
    </para>

    <para>
     When implementing PostgreSQL version 8.1 on AIX 5.3, we
     periodically ran into problems where the statistics collector
     would <quote>mysteriously</quote> not come up successfully.  This
     appears to be the result of unexpected behavior in the IPv6
     implementation.  It looks like PostgreSQL and IPv6 do not play
     very well together on AIX 5.3.
    </para>

    <para>
     Any of the following actions <quote>fix</quote> the problem.
     <itemizedlist>
      <listitem>
       <para>
        Delete the IPv6 address for localhost:
<screen>
(as root)
# ifconfig lo0 inet6 ::1/0 delete
</screen>
       </para>
      </listitem>

      <listitem>
       <para>
        Remove IPv6 from net services.  The
        file <filename>/etc/netsvc.conf</filename> on AIX is roughly
        equivalent to <filename>/etc/nsswitch.conf</filename> on
        Solaris/Linux.  The default, on AIX, is thus:
<programlisting>
hosts=local,bind
</programlisting>
        Replace this with:
<programlisting>
hosts=local4,bind4
</programlisting>
        to deactivate searching for IPv6 addresses.
       </para>
      </listitem>
     </itemizedlist>
    </para>

    <warning> <para> This is really a workaround of problems relating
    to immaturity of IPv6 support, which improved visibly during the
    course of AIX 5.3 releases.  It has worked with AIX version 5.3,
    but does not represent an elegant solution to the problem.  It has
    been reported that this workaround is not only unnecessary, but
    causes problems on AIX 6.1, where IPv6 support has become more
    mature. </para>
    </warning>

   </sect3>

   <sect3>
    <title>Memory management</title>
    <!-- http://archives.postgresql.org/message-id/603bgqmpl9.fsf@dba2.int.libertyrms.com -->

    <para>
     AIX can be somewhat peculiar with regards to the way it does
     memory management.  You can have a server with many multiples of
     gigabytes of RAM free, but still get out of memory or address
     space errors when running applications.  One example
     is <command>createlang</command> failing with unusual errors.
     For example, running as the owner of the PostgreSQL installation:
<screen>
-bash-3.00$ createlang plperl template1
createlang: language installation failed: ERROR:  could not load library "/opt/dbs/pgsql748/lib/plperl.so": A memory address is not in the address space for the process.
</screen>
    Running as a non-owner in the group posessing the PostgreSQL
    installation:
<screen>
-bash-3.00$ createlang plperl template1
createlang: language installation failed: ERROR:  could not load library "/opt/dbs/pgsql748/lib/plperl.so": Bad address
</screen>
     Another example is out of memory errors in the PostgreSQL server
     logs, with every memory allocation near or greater than 256 MB
     failing.
    </para>

    <para>
     The overall cause of all these problems is the default bittedness
     and memory model used by the server process.  By default, all
     binaries built on AIX are 32-bit.  This does not depend upon
     hardware type or kernel in use.  These 32-bit processes are
     limited to 4 GB of memory laid out in 256 MB segments using one
     of a few models.  The default allows for less than 256 MB in the
     heap as it shares a single segment with the stack.
    </para>

    <para>
     In the case of the <command>createlang</command> example, above,
     check your umask and the permissions of the binaries in your
     PostgreSQL installation.  The binaries involved in that example
     were 32-bit and installed as mode 750 instead of 755.  Due to the
     permissions being set in this fashion, only the owner or a member
     of the possessing group can load the library.  Since it isn't
     world-readable, the loader places the object into the process'
     heap instead of the shared library segments where it would
     otherwise be placed.
    </para>

    <para>
     The <quote>ideal</quote> solution for this is to use a 64-bit
     build of PostgreSQL, but that is not always practical, because
     systems with 32-bit processors can build, but not run, 64-bit
     binaries.
    </para>

    <para>
     If a 32-bit binary is desired, set <symbol>LDR_CNTRL</symbol> to
     <literal>MAXDATA=0x<replaceable>n</replaceable>0000000</literal>,
     where 1 &lt;= n &lt;= 8, before starting the PostgreSQL server,
     and try different values and <filename>postgresql.conf</filename>
     settings to find a configuration that works satisfactorily.  This
     use of <symbol>LDR_CNTRL</symbol> tells AIX that you want the
     server to have <symbol>MAXDATA</symbol> bytes set aside for the
     heap, allocated in 256 MB segments.  When you find a workable
     configuration,
     <command>ldedit</command> can be used to modify the binaries so
     that they default to using the desired heap size.  PostgreSQL can
     also be rebuilt, passing <literal>configure
     LDFLAGS="-Wl,-bmaxdata:0x<replaceable>n</replaceable>0000000"</literal>
     to achieve the same effect.
    </para>

    <para>
     For a 64-bit build, set <envar>OBJECT_MODE</envar> to 64 and
     pass <literal>CC="gcc -maix64"</literal>
     and <literal>LDFLAGS="-Wl,-bbigtoc"</literal>
     to <command>configure</command>.  (Options for
    <command>xlc</command> might differ.)  If you omit the export of
    <envar>OBJECT_MODE</envar>, your build may fail with linker errors.  When
    <envar>OBJECT_MODE</envar> is set, it tells AIX's build utilities
    such as <command>ar</>, <command>as</>, and <command>ld</> what
    type of objects to default to handling.
    </para>

    <para>
     By default, overcommit of paging space can happen.  While we have
     not seen this occur, AIX will kill processes when it runs out of
     memory and the overcommit is accessed.  The closest to this that
     we have seen is fork failing because the system decided that
     there was not enough memory for another process.  Like many other
     parts of AIX, the paging space allocation method and
     out-of-memory kill is configurable on a system- or process-wide
     basis if this becomes a problem.
    </para>

    <bibliography>
     <title>References and resources</title>

     <biblioentry>
      <biblioset relation="article">
       <title><ulink url="http://publib.boulder.ibm.com/infocenter/pseries/topic/com.ibm.aix.doc/aixprggd/genprogc/lrg_prg_support.htm">Large Program Support</ulink></title>
      </biblioset>
      <biblioset relation="book">
       <title>AIX Documentation: General Programming Concepts: Writing and Debugging Programs</title>
      </biblioset>
     </biblioentry>

     <biblioentry>
      <biblioset relation="article">
       <title><ulink url="http://publib.boulder.ibm.com/infocenter/pseries/topic/com.ibm.aix.doc/aixprggd/genprogc/address_space.htm">Program Address Space Overview</ulink></title>
      </biblioset>
      <biblioset relation="book">
       <title>AIX Documentation: General Programming Concepts: Writing and Debugging Programs</title>
      </biblioset>
     </biblioentry>

     <biblioentry>
      <biblioset relation="article">
       <title><ulink url="http://publib.boulder.ibm.com/infocenter/pseries/v5r3/topic/com.ibm.aix.doc/aixbman/prftungd/resmgmt2.htm">Performance Overview of the Virtual Memory Manager (VMM)</ulink></title>
      </biblioset>
      <biblioset relation="book">
       <title>AIX Documentation: Performance Management Guide</title>
      </biblioset>
     </biblioentry>

     <biblioentry>
      <biblioset relation="article">
       <title><ulink url="http://publib.boulder.ibm.com/infocenter/pseries/v5r3/topic/com.ibm.aix.doc/aixbman/prftungd/memperf7.htm">Page Space Allocation</ulink></title>
      </biblioset>
      <biblioset relation="book">
       <title>AIX Documentation: Performance Management Guide</title>
      </biblioset>
     </biblioentry>

     <biblioentry>
      <biblioset relation="article">
       <title><ulink url="http://publib.boulder.ibm.com/infocenter/pseries/v5r3/topic/com.ibm.aix.doc/aixbman/prftungd/memperf6.htm">Paging-space thresholds tuning</ulink></title>
      </biblioset>
      <biblioset relation="book">
       <title>AIX Documentation: Performance Management Guide</title>
      </biblioset>
     </biblioentry>

     <biblioentry>
       <title><ulink url="  http://www.redbooks.ibm.com/abstracts/sg245674.html?Open">Developing and Porting C and C++ Applications on AIX</ulink></title>
       <publisher>
        <publishername>IBM Redbook</publishername>
       </publisher>
     </biblioentry>
    </bibliography>
   </sect3>
  </sect2>

  <sect2 id="installation-notes-cygwin">
   <title>Cygwin</title>

   <indexterm zone="installation-notes-cygwin">
    <primary>Cygwin</primary>
    <secondary>installation on</secondary>
   </indexterm>

   <para>
    PostgreSQL can be built using Cygwin, a Linux-like environment for
    Windows, but that method is inferior to the native Windows build
    <![%standalone-ignore[(see <xref linkend="install-win32">)]]> and
    is no longer recommended.
   </para>

   <para>
    When building from source, proceed according to the normal
    installation procedure (i.e., <literal>./configure;
    make</literal>; etc.), noting the following-Cygwin specific
    differences:

    <itemizedlist>
     <listitem>
      <para>
       Set your path to use the Cygwin bin directory before the
       Windows utilities.  This will help prevent problems with
       compilation.
      </para>
     </listitem>

     <listitem>
      <para>
       The GNU make command is called "make" not "gmake".
      </para>
     </listitem>

     <listitem>
      <para>
       The <command>adduser</command> command is not supported; use
       the appropriate user management application on Windows NT,
       2000, or XP.  Otherwise, skip this step.
      </para>
     </listitem>

     <listitem>
      <para>
       The <command>su</command> command is not supported; use ssh to
       simulate su on Windows NT, 2000, or XP. Otherwise, skip this
       step.
      </para>
     </listitem>

     <listitem>
      <para>
       OpenSSL is not supported.
      </para>
     </listitem>

     <listitem>
      <para>
       Start <command>cygserver</command> for shared memory support.
       To do this, enter the command <literal>/usr/sbin/cygserver
       &amp;</literal>.  This program needs to be running anytime you
       start the PostgreSQL server or initialize a database cluster
       (<command>initdb</command>).  The
       default <command>cygserver</command> configuration may need to
       be changed (e.g., increase <symbol>SEMMNS</symbol>) to prevent
       PostgreSQL from failing due to a lack of system resources.
      </para>
     </listitem>

     <listitem>
      <para>
       The parallel regression tests (<literal>make check</literal>)
       can generate spurious regression test failures due to
       overflowing the <function>listen()</function> backlog queue
       which causes connection refused errors or hangs.  You can limit
       the number of connections using the make
       variable <varname>MAX_CONNECTIONS</varname> thus:
<programlisting>
make MAX_CONNECTIONS=5 check
</programlisting>
       (On some systems you can have up to about 10 simultaneous
       connections).
      </para>
     </listitem>
    </itemizedlist>
   </para>

   <para>
    It is possible to install <command>cygserver</command> and the
    PostgreSQL server as Windows NT services.  For information on how
    to do this, please refer to the <filename>README</filename>
    document included with the PostgreSQL binary package on Cygwin.
    It is installed in the
    directory <filename>/usr/share/doc/Cygwin</filename>.
   </para>
  </sect2>

  <sect2 id="installation-notes-hpux">
   <title>HP-UX</title>

   <indexterm zone="installation-notes-hpux">
    <primary>HP-UX</primary>
    <secondary>installation on</secondary>
   </indexterm>

   <para>
    PostgreSQL 7.3+ should work on Series 700/800 PA-RISC machines
    running HP-UX 10.X or 11.X, given appropriate system patch levels
    and build tools.  At least one developer routinely tests on HP-UX
    10.20, and we have reports of successful installations on HP-UX
    11.00 and 11.11.
   </para>

   <para>
    Aside from the PostgreSQL source distribution, you will need GNU
    make (HP's make will not do), and either GCC or HP's full ANSI C
    compiler.  If you intend to build from CVS sources rather than a
    distribution tarball, you will also need Flex (GNU lex) and Bison
    (GNU yacc).  We also recommend making sure you are fairly
    up-to-date on HP patches.  At a minimum, if you are building 64
    bit binaries on on HP-UX 11.11 you may need PHSS_30966 (11.11) or a
    successor patch otherwise <command>initdb</command> may hang:
<literallayout>
PHSS_30966  s700_800 ld(1) and linker tools cumulative patch
</literallayout>

    On general principles you should be current on libc and ld/dld
    patches, as well as compiler patches if you are using HP's C
    compiler.  See HP's support sites such
    as <ulink url="http://itrc.hp.com"></ulink> and
    <ulink url="ftp://us-ffs.external.hp.com/"></ulink> for free
    copies of their latest patches.
   </para>

   <para>
    If you are building on a PA-RISC 2.0 machine and want to have
    64-bit binaries using GCC, you must use GCC 64-bit version. GCC
    binaries for HP-UX PA-RISC and Itanium are available from
    <ulink url="http://www.hp.com/go/gcc"></ulink>.  Don't forget to
    get and install binutils at the same time.
   </para>

   <para>
    If you are building on a PA-RISC 2.0 machine and want the compiled
    binaries to run on PA-RISC 1.1 machines you will need to specify
    <option>+DAportable</option> in <envar>CFLAGS</envar>.
   </para>

   <para>
    If you are building on a HP-UX Itanium machine, you will need the
    latest HP ANSI C compiler with its dependent patch or successor
    patches:
<literallayout>
PHSS_30848  s700_800 HP C Compiler (A.05.57)
PHSS_30849  s700_800 u2comp/be/plugin library Patch
</literallayout>
   </para>

   <para>
    If you have both HP's C compiler and GCC's, then you might want to
    explicitly select the compiler to use when you
    run <command>configure</command>:
<programlisting>
./configure CC=cc
</programlisting>
    for HP's C compiler, or
<programlisting>
./configure CC=gcc
</programlisting>
    for GCC.  If you omit this setting, then configure will
    pick <command>gcc</command> if it has a choice.
   </para>

   <para>
    The default install target location
    is <filename>/usr/local/pgsql</filename>, which you might want to
    change to something under <filename>/opt</filename>.  If so, use
    the
    <option>--prefix</option> switch to <command>configure</command>.
   </para>

   <para>
    In the regression tests, there might be some low-order-digit
    differences in the geometry tests, which vary depending on which
    compiler and math library versions you use.  Any other error is
    cause for suspicion.
   </para>
  </sect2>

  <sect2 id="installation-notes-irix">
   <title>IRIX</title>

   <indexterm zone="installation-notes-irix">
    <primary>IRIX</primary>
    <secondary>installation on</secondary>
   </indexterm>

   <para>
    PostgreSQL has been reported to run successfully on MIPS r8000,
    r10000 (both ip25 and ip27) and r12000(ip35) processors, running
    IRIX 6.5.5m, 6.5.12, 6.5.13, and 6.5.26 with MIPSPro compilers
    version 7.30, 7.3.1.2m, 7.3, and 7.4.4m.
   </para>

   <para>
    You will need the MIPSPro full ANSI C compiler.  There are
    problems trying to build with GCC.  It is a known GCC bug (not
    fixed as of version 3.0) related to using functions that return
    certain kinds of structures. This bug affects functions like
    <function>inet_ntoa</>, <function>inet_lnaof</>, <function>inet_netof</>, <function>inet_makeaddr</>,
    and <function>semctl</>.  It is supposed to be fixed by forcing
    code to link those functions with libgcc, but this has not been
    tested yet.
   </para>

   <para>
    It is known that version 7.4.1m of the MIPSPro compiler generates
    incorrect code.  The symptom is <quote>invalid primary checkpoint
    record</quote> when trying to start the database.)  Version 7.4.4m
    is OK; the status of intermediate versions is uncertain.
   </para>

   <para>
    There may be a compilation problem like the following:
<screen>
cc-1020 cc: ERROR File = pqcomm.c, Line = 427
  The identifier "TCP_NODELAY" is undefined.

                if (setsockopt(port->sock, IPPROTO_TCP, TCP_NODELAY,
</screen>
    Some versions include TCP definitions
    in <filename>sys/xti.h</filename>, so it is necessary to
    add <literal>#include &lt;sys/xti.h&gt;</literal>
    in <filename>src/backend/libpq/pqcomm.c</> and in
    <filename>src/interfaces/libpq/fe-connect.c</>.  If you encounter
    this, please let us know so we can develop a proper fix.
   </para>

   <para>
    In the regression tests, there might be some low-order-digit
    differences in the geometry tests, depending on which FPU are you
    using.  Any other error is cause for suspicion.
   </para>
  </sect2>

  <sect2 id="installation-notes-mingw">
   <title>MinGW/Native Windows</title>

   <indexterm zone="installation-notes-mingw">
    <primary>MinGW</primary>
    <secondary>installation on</secondary>
   </indexterm>

   <para>
    PostgreSQL for Windows can be built using MinGW, a Unix-like build
    environment for Microsoft operating systems, or using
    Microsoft's <productname>Visual C++</productname> compiler suite.
    The MinGW build variant uses the normal build system described in
    this chapter; the Visual C++ build works completely differently
    and is described in <![%standalone-include[the
    documentation]]><![%standalone-ignore[<xref linkend="install-win32">]]>.
    It is a fully native build and uses no additional software like
    MinGW.  A ready-made installer is available on the main
    PostgreSQL web site.
   </para>

   <para>
    The native Windows port requires a 32 or 64-bit version of Windows
    2000 or later. Earlier operating systems do
    not have sufficient infrastructure (but Cygwin may be used on
    those).  MinGW, the Unix-like build tools, and MSYS, a collection
    of Unix tools required to run shell scripts
    like <command>configure</command>, can be downloaded
    from <ulink url="http://www.mingw.org/"></ulink>.  Neither is
    required to run the resulting binaries; they are needed only for
    creating the binaries.
   </para>

   <para>
    After you have everything installed, it is suggested that you
    run <application>psql</application>
    under <command>CMD.EXE</command>, as the MSYS console has
    buffering issues.
   </para>
  </sect2>

  <sect2 id="installation-notes-sco">
   <title>SCO OpenServer and SCO UnixWare</title>

   <indexterm zone="installation-notes-sco">
    <primary>SCO</primary>
    <secondary>installation on</secondary>
   </indexterm>

   <indexterm zone="installation-notes-sco">
    <primary>UnixWare</primary>
    <secondary>installation on</secondary>
   </indexterm>

   <para>
    PostgreSQL can be built on SCO UnixWare 7 and SCO OpenServer 5.
    On OpenServer, you can use either the OpenServer Development Kit
    or the Universal Development Kit.  However, some tweaking may be
    needed, as described below.
   </para>

   <sect3>
    <title>Skunkware</title>

    <para>
     You should locate your copy of the SCO Skunkware CD.  The
     Skunkware CD is included with UnixWare 7 and current versions of
     OpenServer 5.  Skunkware includes ready-to-install versions of
     many popular programs that are available on the Internet.  For
     example, gzip, gunzip, GNU Make, Flex, and Bison are all
     included.  For UnixWare 7.1, this CD is now labeled "Open License
     Software Supplement".  If you do not have this CD, the software
     on it is available
     from <ulink url="http://www.sco.com/skunkware/"></ulink>.
    </para>

    <para>
     Skunkware has different versions for UnixWare and OpenServer.
     Make sure you install the correct version for your operating
     system, except as noted below.
    </para>

    <para>
     On UnixWare 7.1.3 and beyond, the GCC compiler is included on the
     UDK CD as is GNU Make.
    </para>
   </sect3>

   <sect3>
    <title>GNU Make</title>

    <para>
     You need to use the GNU Make program, which is on the Skunkware
     CD.  By default, it installs
     as <filename>/usr/local/bin/make</filename>.  To avoid confusion
     with the SCO <filename>make</filename> program, you may want to rename GNU <filename>make</filename> to
     <filename>gmake</filename>.
    </para>

    <para>
     As of UnixWare 7.1.3 and above, the GNU Make program is is the
     OSTK portion of the UDK CD, and is
     in <filename>/usr/gnu/bin/gmake</filename>.
    </para>
   </sect3>

   <sect3>
    <title>Readline</title>

    <para>
     The Readline library is on the Skunkware CD.  But it is not
     included on the UnixWare 7.1 Skunkware CD.  If you have the
     UnixWare 7.0.0 or 7.0.1 Skunkware CDs, you can install it from
     there.  Otherwise,
     try <ulink url="http://www.sco.com/skunkware/"></ulink>.
    </para>

    <para>
     By default, Readline installs into <filename>/usr/local/lib</> and
     <filename>/usr/local/include</>.  However, the
     PostgreSQL <command>configure</command> program will not find it
     there without help.  If you installed Readline, then use the
     following options to <command>configure</command>:
<programlisting>
./configure --with-libraries=/usr/local/lib --with-includes=/usr/local/include
</programlisting>
    </para>
   </sect3>

   <sect3>
    <title>Using the UDK on OpenServer</title>

    <para>
     If you are using the new Universal Development Kit (UDK) compiler
     on OpenServer, you need to specify the locations of the UDK
     libraries:
<programlisting>
./configure --with-libraries=/udk/usr/lib --with-includes=/udk/usr/include
</programlisting>
     Putting these together with the Readline options from above:
<programlisting>
./configure --with-libraries="/udk/usr/lib /usr/local/lib" --with-includes="/udk/usr/include /usr/local/include"
</programlisting>
    </para>
   </sect3>

   <sect3>
    <title>Reading the PostgreSQL man pages</title>

    <para>
     By default, the PostgreSQL man pages are installed into
     <filename>/usr/local/pgsql/man</filename>.  By default, UnixWare
     does not look there for man pages.  To be able to read them you
     need to modify the
     <varname>MANPATH</varname> variable
     in <filename>/etc/default/man</filename>, for example:
<programlisting>
MANPATH=/usr/lib/scohelp/%L/man:/usr/dt/man:/usr/man:/usr/share/man:scohelp:/usr/local/man:/usr/local/pgsql/man
</programlisting>
    </para>

    <para>
     On OpenServer, some extra research needs to be invested to make
     the man pages usable, because the man system is a bit different
     from other platforms.  Currently, PostgreSQL will not install
     them at all.
    </para>
   </sect3>

   <sect3>
    <title>C99 Issues with the 7.1.1b Feature Supplement</title>

    <para>
     For compilers earlier than the one released with OpenUNIX 8.0.0
     (UnixWare 7.1.2), including the 7.1.1b Feature Supplement, you
     may need to specify <option>-Xb</option>
     in <varname>CFLAGS</varname> or the <varname>CC</varname>
     environment variable.  The indication of this is an error in
     compiling <filename>tuplesort.c</filename> referencing inline
     functions.  Apparently there was a change in the 7.1.2(8.0.0)
     compiler and beyond.
    </para>
   </sect3>

   <sect3>
    <title>Threading on UnixWare</title>

    <para>
     For threading, you<emphasis>must</emphasis> use <option>-Kpthread</option>
     on <emphasis>all</emphasis> libpq-using programs.  libpq
     uses <function>pthread_*</function> calls, which are only
     available with the
     <option>-Kpthread</>/<option>-Kthread</> flag.
    </para>
   </sect3>
  </sect2>

  <sect2 id="installation-notes-solaris">
   <title>Solaris</title>

   <indexterm zone="installation-notes-solaris">
    <primary>Solaris</primary>
    <secondary>installation on</secondary>
   </indexterm>

   <para>
    PostgreSQL is well-supported on Solaris.  The more up to date your
    operating system, the fewer issues you will experience; details
    below.
   </para>

   <para>
    Note that PostgreSQL is bundled with Solaris 10 (from update 2).
    Official packages are also available on
    <ulink url="http://pgfoundry.org/projects/solarispackages/"></ulink>.
    Packages for older Solaris versions (8, 9) you can be obtained
    from <ulink url="http://www.sunfreeware.com/"></ulink> or
    <ulink url="http://www.blastwave.org/"></ulink>.
   </para>

   <sect3>
    <title>Required tools</title>

    <para>
     You can build with either GCC or Sun's compiler suite.  For
     better code optimization, Sun's compiler is strongly recommended
     on the SPARC architecture.  We have heard reports of problems
     when using GCC 2.95.1; gcc 2.95.3 or later is recommended.  If
     you are using Sun's compiler, be careful not to select
     <filename>/usr/ucb/cc</filename>;
     use <filename>/opt/SUNWspro/bin/cc</filename>.
    </para>

    <para>
     You can download Sun Studio
     from <ulink url="http://developers.sun.com/sunstudio/downloads/"></ulink>.
     Many of GNU tools are integrated into Solaris 10, or they are
     present on the Solaris companion CD.  If you like packages for
     older version of Solaris, you can find these tools
     at <ulink url="http://www.sunfreeware.com"></ulink>
     or <ulink url="http://www.blastwave.org"></ulink>.  If you prefer
     sources, look
     at <ulink url="http://www.gnu.org/order/ftp.html"></ulink>.
    </para>
   </sect3>

   <sect3>
    <title>Problems with OpenSSL</title>

    <para>
     When you build PostgreSQL with OpenSSL support you might get
     compilation errors in the following files:
     <itemizedlist>
      <listitem><para><filename>src/backend/libpq/crypt.c</filename></para></listitem>
      <listitem><para><filename>src/backend/libpq/password.c</filename></para></listitem>
      <listitem><para><filename>src/interfaces/libpq/fe-auth.c</filename></para></listitem>
      <listitem><para><filename>src/interfaces/libpq/fe-connect.c</filename></para></listitem>
     </itemizedlist>

     This is because of a namespace conflict between the standard
     <filename>/usr/include/crypt.h</filename> header and the header
     files provided by OpenSSL.
    </para>

    <para>
     Upgrading your OpenSSL installation to version 0.9.6a fixes this
     problem.  Solaris 9 and above has a newer version of OpenSSL.
    </para>
   </sect3>

   <sect3>
    <title>configure complains about a failed test program</title>

    <para>
     If <command>configure</command> complains about a failed test
     program, this is probably a case of the run-time linker being
     unable to find some library, probably libz, libreadline or some
     other non-standard library such as libssl.  To point it to the
     right location, set the <envar>LDFLAGS</envar> environment
     variable on the <command>configure</command> command line, e.g.,
<programlisting>
configure ... LDFLAGS="-R /usr/sfw/lib:/opt/sfw/lib:/usr/local/lib"
</programlisting>
     See
     the <citerefentry><refentrytitle>ld</><manvolnum>1</></citerefentry>
     man page for more information.
    </para>
   </sect3>

   <sect3>
    <title>64-bit build sometimes crashes</title>

    <para>
     On Solaris 7 and older, the 64-bit version of libc has a buggy
     <function>vsnprintf</function> routine, which leads to erratic
     core dumps in PostgreSQL.  The simplest known workaround is to
     force PostgreSQL to use its own version of vsnprintf rather than
     the library copy.  To do this, after you
     run <command>configure</command> edit a file produced by
     <command>configure</command>:
     In <filename>src/Makefile.global</filename>, change the line
<programlisting>
LIBOBJS =
</programlisting>
     to read
<programlisting>
LIBOBJS = snprintf.o
</programlisting>
     (There might be other files already listed in this variable.
     Order does not matter.)  Then build as usual.
    </para>
   </sect3>

   <sect3>
    <title>Compiling for optimal performance</title>

    <para>
     On the SPARC architecture, Sun Studio is strongly recommended for
     compilation.  Try using the <option>-xO5</option> optimization
     flag to generate significantly faster binaries.  Do not use any
     flags that modify behavior of floating-point operations
     and <varname>errno</varname> processing (e.g.,
     <option>-fast</option>).  These flags could raise some
     nonstandard PostgreSQL behavior for example in the date/time
     computing.
    </para>

    <para>
     If you do not have a reason to use 64-bit binaries on SPARC,
     prefer the 32-bit version.  The 64-bit operations are slower and
     64-bit binaries are slower than the 32-bit variants.  And on
     other hand, 32-bit code on the AMD64 CPU family is not native,
     and that is why 32-bit code is significant slower on this CPU
     family.
    </para>

    <para>
     Some tricks for tuning PostgreSQL and Solaris for performance can
     be found
     at <ulink url="http://www.sun.com/servers/coolthreads/tnb/applications_postgresql.jsp"></ulink>.
     This article is primary focused on T2000 platform, but many of
     the recommendations are also useful on other hardware with
     Solaris.
    </para>
   </sect3>

   <sect3>
    <title>Using DTrace for tracing PostgreSQL</title>

    <para>
     Yes, using DTrace is possible.  See <![%standalone-include[the
     documentation]]>
     <![%standalone-ignore[<xref linkend="dynamic-trace">]]> for further
     information.  You can also find more information in this
     article: <ulink url="http://blogs.sun.com/robertlor/entry/user_level_dtrace_probes_in"></ulink>.
    </para>

    <para>
     If you see the linking of the postgres executable abort with an
     error message like:
<screen>
Undefined                       first referenced
 symbol                             in file
AbortTransaction                    utils/probes.o
CommitTransaction                   utils/probes.o
ld: fatal: Symbol referencing errors. No output written to postgres
collect2: ld returned 1 exit status
gmake: *** [postgres] Error 1
</screen>
     your DTrace installation is too old to handle probes in static
     functions.  You need Solaris 10u4 or newer.
    </para>
   </sect3>
  </sect2>
 </sect1>

</chapter>
