<chapter id="config">
<title id="install-config">Configuration Options</title>

 <sect1>
  <title>Parameters for Configuration (<application>configure</application>)</title>

  <para>
   The full set of parameters available in <application>configure</application>
   can be obtained by typing
   
   <programlisting>
    $ ./configure --help
   </programlisting>
  </para>
  <para>
   The following parameters may be of interest to installers:
   
   <programlisting>
Directory and file names:
  --prefix=PREFIX         install architecture-independent files in PREFIX
                          [/usr/local/pgsql]
  --bindir=DIR            user executables in DIR [EPREFIX/bin]
  --libdir=DIR            object code libraries in DIR [EPREFIX/lib]
  --includedir=DIR        C header files in DIR [PREFIX/include]
  --mandir=DIR            man documentation in DIR [PREFIX/man]
Features and packages:
  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
  --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
  --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
--enable and --with options recognized:
  --with-template=<replaceable>template</replaceable>
                          use operating system template file
                              see template directory
  --with-includes=<replaceable>incdir</replaceable>
                          site header files for tk/tcl, etc in DIR
  --with-libs=<replaceable>incdir</replaceable>
                          also search for libraries in DIR
  --with-libraries=<replaceable>libdir</replaceable>
                          also search for libraries in DIR
  --enable-locale         enable locale support
  --enable-recode         enable cyrillic recode support
  --with-mb=<replaceable>encoding</replaceable>
                          enable multi-byte support
  --with-pgport=<replaceable>portnum</replaceable>
                          change default startup port
  --with-maxbackends=<replaceable>n</replaceable>
                          set default maximum number of server processes 
  --with-tcl              build Tcl interfaces and pgtclsh
  --with-tclconfig=<replaceable>tcldir</replaceable>
                          tclConfig.sh and tkConfig.sh are in DIR
  --with-perl             build Perl interface
  --with-odbc             build ODBC driver package
  --with-odbcinst=<replaceable>odbcdir</replaceable>
                          change default directory for odbcinst.ini
  --enable-cassert        enable assertion checks (debugging)
  --with-CC=<replaceable>compiler</replaceable>
                          use specific C compiler
  --with-CXX=<replaceable>compiler</replaceable>
                          use specific C++ compiler
  --without-CXX           prevent building C++ code 
   </programlisting>
  </para>
  <para>
   Some systems may have trouble building a specific feature of
   <productname>Postgres</productname>. For example, systems with a damaged
   C++ compiler may need to specify <option>--without-CXX</option> to instruct
   the build procedure to skip construction of <filename>libpq++</filename>.
  </para>
 </sect1>
 <sect1>
  <title>Parameters for Building (<application>make</application>)</title>
  
  <para>
   Many installation-related parameters can be set in the building
   stage of <productname>Postgres</productname> installation.
  </para>
  <para>
   In most cases, these parameters should be placed in a file,
   <filename>Makefile.custom</filename>, intended just for that purpose.
   The default distribution does not contain this optional file, so you
   will create it using a text editor of your choice. When upgrading installations,
   you can simply copy your old Makefile.custom to the new installation before
   doing the build.
   
   <synopsis>
    make [ <replaceable>variable</replaceable>=<replaceable class="parameter">value</replaceable> [,...] ]
   </synopsis>
  </para>
  <para>
   A few of the many variables which can be specified are:
   
   <variablelist>
    <varlistentry>
     <term>
      <envar>POSTGRESDIR</envar>
     </term>
     <listitem>
      <para>
       Top of the installation tree.
      </para>
     </listitem>
    </varlistentry>
    
    <varlistentry>
     <term>
      <envar>BINDIR</envar>
     </term>
     <listitem>
      <para>
       Location of applications and utilities.
      </para>
     </listitem>
    </varlistentry>
    
    <varlistentry>
     <term>
      <envar>LIBDIR</envar>
     </term>
     <listitem>
      <para>
       Location of object libraries, including shared libraries.
      </para>
     </listitem>
    </varlistentry>
    
    <varlistentry>
     <term>
      <envar>HEADERDIR</envar>
     </term>
     <listitem>
      <para>
       Location of include files.
      </para>
     </listitem>
    </varlistentry>
    
    <varlistentry>
     <term>
      <envar>ODBCINST</envar>
     </term>
     <listitem>
      <para>
       Location of installation-wide <application>psqlODBC</application>
       (<acronym>ODBC</acronym>) configuration file.
      </para>
     </listitem>
    </varlistentry>
    
   </variablelist>
  </para>
  <para>
   There are other optional parameters which are not as commonly used.
   Many of those listed below are appropriate when doing 
   <application>Postgres</application> server code development.
   
   <variablelist>
    <varlistentry>
     <term>
      <envar>CFLAGS</envar>
     </term>
     <listitem>
      <para>
       Set flags for the C compiler. 
       Should be assigned with "+=" to retain relevant default parameters.
      </para>
     </listitem>
    </varlistentry>
    
    <varlistentry>
     <term>
      YFLAGS
     </term>
     <listitem>
      <para>
       Set flags for the yacc/bison parser. <option>-v</option> might be
       used to help diagnose problems building a new parser.
       Should be assigned with "+=" to retain relevant default parameters.
      </para>
     </listitem>
    </varlistentry>
    
    <varlistentry>
     <term>
      <envar>USE_TCL</envar>
     </term>
     <listitem>
      <para>
       Enable Tcl interface building.
      </para>
     </listitem>
    </varlistentry>
    
    <varlistentry>
     <term>
      <envar>HSTYLE</envar>
     </term>
     <listitem>
      <para>
       DocBook <acronym>HTML</acronym> style sheets for building the 
       documentation from scratch.
       Not used unless you are developing new documentation from the
       DocBook-compatible <acronym>SGML</acronym> source documents in
       <filename>doc/src/sgml/</filename>.
      </para>
     </listitem>
    </varlistentry>
    
    <varlistentry>
     <term>
      <envar>PSTYLE</envar>
     </term>
     <listitem>
      <para>
       DocBook style sheets for building printed documentation from scratch.
       Not used unless you are developing new documentation from the
       DocBook-compatible <acronym>SGML</acronym> source documents in
       <filename>doc/src/sgml/</filename>.
      </para>
     </listitem>
    </varlistentry>
    
   </variablelist>
  </para>
  <para>
   Here is an example <filename>Makefile.custom</filename> for a
   PentiumPro Linux system:
   
   <programlisting>
# Makefile.custom
# Thomas Lockhart 1999-06-01

POSTGRESDIR= /opt/postgres/current
CFLAGS+= -m486 -O2

# documentation

HSTYLE= /home/tgl/SGML/db118.d/docbook/html
PSTYLE= /home/tgl/SGML/db118.d/docbook/print
   </programlisting>
  </para>
 </sect1> 
 <Sect1>
  <Title>Locale Support</Title>
  
  <Para>
   <Note>
    <Para>
     Written by Oleg Bartunov.
     See <ULink url="http://www.sai.msu.su/~megera/postgres/">Oleg's web page</ULink>
     for additional information on locale and Russian language support.
     
    </Para>
   </Note>
   While doing a project for a company in Moscow, Russia, 
   I encountered the problem that postgresql had no
   support of national alphabets. After looking for possible workarounds 
   I decided to develop support of locale myself.
   I'm not a C-programer but already had some experience with locale programming 
   when I work with perl
   (debugging) and glimpse. After several days of digging through
   the <ProductName>Postgres</ProductName> source tree I made very minor corections to
   src/backend/utils/adt/varlena.c and src/backend/main/main.c and got what I needed! 
   I did support only for
   <envar>LC_CTYPE</envar> and <envar>LC_COLLATE</envar>, 
   but later <envar>LC_MONETARY</envar> was added by others. I got many
   messages from people about this patch so I decided to send it to developers 
   and (to my surprise) it was
   incorporated into the <productname>Postgres</productname> distribution.
  </para>
  <Para>
   People often complain that locale doesn't work for them. 
   There are several common mistakes: 
   
   <ItemizedList>
    <ListItem>
     <Para>
      Didn't properly configure postgresql before compilation. 
      You must run configure with --enable-locale option to enable locale support. 
      Didn't setup environment correctly when starting postmaster. 
      You must define environment variables 
      <envar>LC_CTYPE</envar> and <envar>LC_COLLATE</envar> 
      before running postmaster
      because backend gets information about locale from environment. 
      I use following shell script
      (runpostgres): 
      
      <ProgramListing>
       #!/bin/sh
       
       export LC_CTYPE=koi8-r
       export LC_COLLATE=koi8-r
       postmaster -B 1024 -S -D/usr/local/pgsql/data/ -o '-Fe'
      </ProgramListing>

      and run it from rc.local as 

      <ProgramListing>
       /bin/su - postgres -c "/home/postgres/runpostgres"
      </ProgramListing>

     </Para>
    </ListItem>
    <ListItem>
     <Para>
      Broken locale support in OS (for example, locale support in libc 
      under Linux several times has changed
      and this caused a lot of problems). Latest perl has also support of 
      locale and if locale is broken <command>perl -v</command> will
      complain something like: 
      
      <programlisting>
       8:17[mira]:~/WWW/postgres>setenv LC_CTYPE not_exist
       8:18[mira]:~/WWW/postgres>perl -v
       perl: warning: Setting locale failed.
       perl: warning: Please check that your locale settings:
       LC_ALL = (unset),
           LC_CTYPE = "not_exist",
           LANG = (unset)
       are supported and installed on your system.
       perl: warning: Falling back to the standard locale ("C").
      </programlisting>

     </Para>
    </ListItem>
    <ListItem>
     <Para>
      Wrong location of locale files!
      
      Possible locations include: 
      <filename>/usr/lib/locale</filename> 
      (Linux, Solaris), <filename>/usr/share/locale</filename> (Linux), 
      <filename>/usr/lib/nls/loc</filename> (DUX 4.0).
      
      Check <command>man locale</command> to find the correct location.
      Under Linux I did a symbolic link between <filename>/usr/lib/locale</filename> and
      <filename>/usr/share/locale</filename> to be sure that 
      the next libc will not break my locale.
     </Para>
    </ListItem>
   </ItemizedList>
  </para>

  <Sect2>
   <Title>What are the Benefits?</Title> 

   <Para>
    You can use ~* and order by operators for strings contain characters 
    from national alphabets. Non-english users
    definitely need that. If you won't use locale stuff just undefine 
    the USE_LOCALE variable. 
   </para>
  </sect2>

  <Sect2>
   <Title>What are the Drawbacks?</Title>
   
   <Para>
    There is one evident drawback of using locale - its speed! 
    So, use locale only if you really need it. 
   </para>
  </sect2>
 </sect1>
 
 <Sect1>
  <Title>Kerberos Authentication</Title>
  
  <Para>
   <productname>Kerberos</productname> is an industry-standard secure authentication
   system suitable for distributed computing over a public network.
  </para>

  <sect2>
   <title>Availability</title>
   
   <para>
    The
    <productname>Kerberos</productname>
    authentication system is not distributed with <Productname>Postgres</Productname>.  Versions of
    <productname>Kerberos</productname>
    are typically available as optional software from operating system
    vendors.  In addition, a source code distribution may be obtained through
    <ulink url="ftp://athena-dist.mit.edu">MIT Project Athena</ulink>.
   </para>
   <note>
    <para>
     You may wish to obtain the MIT version even if your
     vendor provides a version, since some vendor ports have been
     deliberately crippled or rendered non-interoperable with the MIT
     version.
    </para>
   </note>
   <para>
    Users located outside the United States of America and
    Canada are warned that distribution of the actual encryption code in
    <productname>Kerberos</productname>
    is restricted by U. S. Government export regulations.
   </para>
   <para>
    Inquiries regarding your <productname>Kerberos</productname> 
    should be directed to your vendor or
    <ulink url="info-kerberos@athena.mit.edu">MIT Project Athena</ulink>.
    Note that <acronym>FAQL</acronym>s
    (Frequently-Asked Questions Lists) are periodically posted to the
    <ulink url="mailto:kerberos@ATHENA.MIT.EDU"><productname>Kerberos</productname> mailing list</ulink>
    (send
    <ulink url="mailto:kerberos-request@ATHENA.MIT.EDU">mail to subscribe</ulink>),
    and 
    <ulink url="news:comp.protocols.kerberos">USENET news group</ulink>.
   </para>
  </sect2>
  
  <sect2>
   <title>Installation</title>
   
   <para>
    Installation of 
    <productname>Kerberos</productname>
    itself is covered in detail in the 
    <citetitle>Kerberos Installation Notes</citetitle> .
    Make sure that the server key file (the <filename>srvtab</filename>
    or <filename>keytab</filename>)
    is somehow readable by the <productname>Postgres</productname> account.
   </para>
   <para>
    <Productname>Postgres</Productname> and its clients can be compiled to use 
    either Version 4 or Version 5 of the MIT
    <productname>Kerberos</productname>
    protocols by setting the 
    <envar>KRBVERS</envar>
    variable in the file <filename>src/Makefile.global</filename> to the
    appropriate value.  You can also change the location where
    <Productname>Postgres</Productname>
    expects to find the associated libraries, header files and its own
    server key file.
   </para>
   <para>
    After compilation is complete, <Productname>Postgres</Productname>
    must be registered as a <productname>Kerberos</productname>
    service.  See the
    <citetitle>Kerberos Operations Notes</citetitle>
    and related manual pages for more details on registering services.
   </para>
  </sect2>

  <sect2>
   <title>Operation</title>
   
   <para>
    After initial installation, <Productname>Postgres</Productname> 
    should operate in all ways as a normal
    <productname>Kerberos</productname>
    service.  For details on the use of authentication, see the
    <citetitle>PostgreSQL User's Guide</citetitle> reference sections
    for <application>postmaster</application>
    and <application>psql</application>.
   </para>
   <para>
    In the 
    <productname>Kerberos</productname>
    Version 5 hooks, the following assumptions are made about user
    and service naming:

    <itemizedlist>
     <listitem>
      <para>
       User principal names (anames) are assumed to
       contain the actual Unix/<Productname>Postgres</Productname> user name
       in the first component.
      </para>
     </listitem>
     <listitem>
      <para>
       The <Productname>Postgres</Productname> service is assumed to be have two components,
       the service name and a hostname, canonicalized as in Version 4 (i.e., with all domain
       suffixes removed).
      </para>
     </listitem>
     
    </itemizedlist>
   </para>
   <para>
    <table tocentry="1">
     <title>Kerberos Parameter Examples</title>
     <titleabbrev>Kerberos</titleabbrev>

     <tgroup cols="2">
      <thead>
       <row>
	<entry>
	 Parameter
	</entry>
	<entry>
	 Example
	</entry>
       </row>
      </thead>
      <tbody>
       <row>
	<entry>
	 user
	</entry>
	<entry>
	 frew@S2K.ORG
	</entry>
       </row>
       <row>
	<entry>
	 user
	</entry>
	<entry>
	 aoki/HOST=miyu.S2K.Berkeley.EDU@S2K.ORG
	</entry>
       </row>	   
       <row>
	<entry>
	 host
	</entry>
	<entry>
	 postgres_dbms/ucbvax@S2K.ORG
	</entry>
       </row>
      </tbody>
     </tgroup>
    </table>
   </para>
   <para>
    Support for Version 4 will disappear sometime after the production
    release of Version 5 by MIT.
   </para>
  </sect2>
 </sect1>
</chapter>
