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><H1
><A
NAME="APP-PGCONFIG"
></A
>pg_config</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN81956"
></A
><H2
>Name</H2
>pg_config -- retrieve information about the installed version of <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
></DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN81962"
></A
><H2
>Synopsis</H2
><P
><TT
CLASS="COMMAND"
>pg_config</TT
> [<TT
CLASS="REPLACEABLE"
><I
>option</I
></TT
>...]</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN81967"
></A
><H2
>Description</H2
><P
> The <SPAN
CLASS="APPLICATION"
>pg_config</SPAN
> utility prints configuration parameters
of the currently installed version of <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>. It is
intended, for example, to be used by software packages that want to interface
to <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> to facilitate finding the required header files
and libraries.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN81973"
></A
><H2
>Options</H2
><P
> To use <SPAN
CLASS="APPLICATION"
>pg_config</SPAN
>, supply one or more of the following
options:
<P
></P
></P><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="OPTION"
>--bindir</TT
></DT
><DD
><P
> Print the location of user executables. Use this, for example, to find
the <TT
CLASS="COMMAND"
>psql</TT
> program. This is normally also the location
where the <TT
CLASS="FILENAME"
>pg_config</TT
> program resides.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--docdir</TT
></DT
><DD
><P
> Print the location of documentation files.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--htmldir</TT
></DT
><DD
><P
> Print the location of HTML documentation files.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--includedir</TT
></DT
><DD
><P
> Print the location of C header files of the client interfaces.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--pkgincludedir</TT
></DT
><DD
><P
> Print the location of other C header files.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--includedir-server</TT
></DT
><DD
><P
> Print the location of C header files for server programming.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--libdir</TT
></DT
><DD
><P
> Print the location of object code libraries.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--pkglibdir</TT
></DT
><DD
><P
> Print the location of dynamically loadable modules, or where
the server would search for them. (Other
architecture-dependent data files might also be installed in this
directory.)
</P
></DD
><DT
><TT
CLASS="OPTION"
>--localedir</TT
></DT
><DD
><P
> Print the location of locale support files. (This will be an empty
string if locale support was not configured when
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> was built.)
</P
></DD
><DT
><TT
CLASS="OPTION"
>--mandir</TT
></DT
><DD
><P
> Print the location of manual pages.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--sharedir</TT
></DT
><DD
><P
> Print the location of architecture-independent support files.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--sysconfdir</TT
></DT
><DD
><P
> Print the location of system-wide configuration files.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--pgxs</TT
></DT
><DD
><P
> Print the location of extension makefiles.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--configure</TT
></DT
><DD
><P
> Print the options that were given to the <TT
CLASS="FILENAME"
>configure</TT
>
script when <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> was configured for building.
This can be used to reproduce the identical configuration, or
to find out with what options a binary package was built. (Note
however that binary packages often contain vendor-specific custom
patches.) See also the examples below.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--cc</TT
></DT
><DD
><P
> Print the value of the <TT
CLASS="VARNAME"
>CC</TT
> variable that was used for building
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>. This shows the C compiler used.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--cppflags</TT
></DT
><DD
><P
> Print the value of the <TT
CLASS="VARNAME"
>CPPFLAGS</TT
> variable that was used for building
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>. This shows C compiler switches needed
at preprocessing time (typically, <TT
CLASS="LITERAL"
>-I</TT
> switches).
</P
></DD
><DT
><TT
CLASS="OPTION"
>--cflags</TT
></DT
><DD
><P
> Print the value of the <TT
CLASS="VARNAME"
>CFLAGS</TT
> variable that was used for building
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>. This shows C compiler switches.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--cflags_sl</TT
></DT
><DD
><P
> Print the value of the <TT
CLASS="VARNAME"
>CFLAGS_SL</TT
> variable that was used for building
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>. This shows extra C compiler switches
used for building shared libraries.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--ldflags</TT
></DT
><DD
><P
> Print the value of the <TT
CLASS="VARNAME"
>LDFLAGS</TT
> variable that was used for building
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>. This shows linker switches.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--ldflags_ex</TT
></DT
><DD
><P
> Print the value of the <TT
CLASS="VARNAME"
>LDFLAGS_EX</TT
> variable that was used for building
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>. This shows linker switches
used for building executables only.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--ldflags_sl</TT
></DT
><DD
><P
> Print the value of the <TT
CLASS="VARNAME"
>LDFLAGS_SL</TT
> variable that was used for building
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>. This shows linker switches
used for building shared libraries only.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--libs</TT
></DT
><DD
><P
> Print the value of the <TT
CLASS="VARNAME"
>LIBS</TT
> variable that was used for building
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>. This normally contains <TT
CLASS="LITERAL"
>-l</TT
>
switches for external libraries linked into <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>.
</P
></DD
><DT
><TT
CLASS="OPTION"
>--version</TT
></DT
><DD
><P
> Print the version of <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>.
</P
></DD
><DT
><TT
CLASS="OPTION"
>-?</TT
><BR><TT
CLASS="OPTION"
>--help</TT
></DT
><DD
><P
> Show help about <SPAN
CLASS="APPLICATION"
>pg_config</SPAN
> command line
arguments, and exit.
</P
></DD
></DL
></DIV
><P>
If more than one option is given, the information is printed in that order,
one item per line. If no options are given, all available information
is printed, with labels.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN82126"
></A
><H2
>Notes</H2
><P
> The option <TT
CLASS="OPTION"
>--includedir-server</TT
> was added in
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> 7.2. In prior releases, the server include files were
installed in the same location as the client headers, which could
be queried with the option <TT
CLASS="OPTION"
>--includedir</TT
>. To make your
package handle both cases, try the newer option first and test the
exit status to see whether it succeeded.
</P
><P
> The options <TT
CLASS="OPTION"
>--docdir</TT
>, <TT
CLASS="OPTION"
>--pkgincludedir</TT
>,
<TT
CLASS="OPTION"
>--localedir</TT
>, <TT
CLASS="OPTION"
>--mandir</TT
>,
<TT
CLASS="OPTION"
>--sharedir</TT
>, <TT
CLASS="OPTION"
>--sysconfdir</TT
>,
<TT
CLASS="OPTION"
>--cc</TT
>, <TT
CLASS="OPTION"
>--cppflags</TT
>,
<TT
CLASS="OPTION"
>--cflags</TT
>, <TT
CLASS="OPTION"
>--cflags_sl</TT
>,
<TT
CLASS="OPTION"
>--ldflags</TT
>, <TT
CLASS="OPTION"
>--ldflags_sl</TT
>,
and <TT
CLASS="OPTION"
>--libs</TT
> were added in <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> 8.1.
The option <TT
CLASS="OPTION"
>--htmldir</TT
> was added in <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> 8.4.
The option <TT
CLASS="OPTION"
>--ldflags_ex</TT
> was added in <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> 9.0.
</P
><P
> In releases prior to <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> 7.1, before
<TT
CLASS="COMMAND"
>pg_config</TT
> came to be, a method for finding the
equivalent configuration information did not exist.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN82154"
></A
><H2
>Example</H2
><P
> To reproduce the build configuration of the current PostgreSQL
installation, run the following command:
</P><PRE
CLASS="PROGRAMLISTING"
>eval ./configure `pg_config --configure`</PRE
><P>
The output of <TT
CLASS="LITERAL"
>pg_config --configure</TT
> contains
shell quotation marks so arguments with spaces are represented
correctly. Therefore, using <TT
CLASS="LITERAL"
>eval</TT
> is required
for proper results.
</P
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