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<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<title>configure - Configure the source tree - Apache HTTP Server</title>
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<p class="apache">Apache HTTP Server Version 2.0</p>
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<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.0</a> > <a href="./">Programs</a></div><div id="page-content"><div id="preamble"><h1>configure - Configure the source tree</h1>
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<p>The <code>configure</code> script configures the source tree
for compiling and installing the Apache HTTP Server on your
particular platform. Various options allow the compilation of a
server corresponding to your personal requirements.</p>
<p>This script, included in the root directory of the source
distribution, is for compilation on Unix and Unix-like systems
only. For other platforms, see the <a href="../platform/">platform</a> documentation.</p>
</div>
<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#synopsis">Synopsis</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#options">Options</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#env">Environment variables</a></li>
</ul><h3>See also</h3><ul class="seealso"><li><a href="../install.html">Compiling and Installing</a></li></ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="synopsis" id="synopsis">Synopsis</a></h2>
<p>You should call the <code>configure</code> script from within the
root directory of the distribution.</p>
<p><code><strong>./configure</strong> [<var>OPTION</var>]...
[<var>VAR</var>=<var>VALUE</var>]...</code></p>
<p>To assign environment variables (e.g. <code>CC</code>,
<code>CFLAGS</code> ...), specify them as
<code><var>VAR</var>=<var>VALUE</var></code>. See <a href="#env">below</a>
for descriptions of some of the useful variables.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="options" id="options">Options</a></h2>
<ul>
<li><a href="#configurationoptions">Configuration options</a></li>
<li><a href="#installationdirectories">Installation directories</a></li>
<li><a href="#systemtypes">System types</a></li>
<li><a href="#optionalfeatures">Optional features</a></li>
<li><a href="#supportopt">Options for support programs</a></li>
</ul>
<h3><a name="configurationoptions" id="configurationoptions">Configuration options</a></h3>
<p>The following options influence the behavior of
<code>configure</code> itself.</p>
<dl>
<dt><code>-C</code></dt>
<dt><code>--config-cache</code></dt>
<dd>This is an alias for <code>--cache-file=config.cache</code></dd>
<dt><code>--cache-file=<var>FILE</var></code></dt>
<dd>The test results will be cached in file <var>FILE</var>.
This option is disabled by default.</dd>
<dt><code>-h</code></dt>
<dt><code>--help [short|recursive]</code></dt>
<dd>Output the help and exit. With the argument <code>short</code> only
options specific to this package will displayed. The argument
<code>recursive</code> displays the short help of all the included
packages.</dd>
<dt><code>-n</code></dt>
<dt><code>--no-create</code></dt>
<dd>The <code>configure</code> script is run normally but does
not create output files. This is useful to check the test results
before generating makefiles for compilation.</dd>
<dt><code>-q</code></dt>
<dt><code>--quiet</code></dt>
<dd>Do not print <code>checking ...</code> messages during the
configure process.</dd>
<dt><code>--srcdir=<var>DIR</var></code></dt>
<dd>Defines directory <var>DIR</var> to be the source file directory.
Default is the directory, where configure is located, or the parent
directory <code>..</code>.</dd>
<dt><code>--silent</code></dt>
<dd>Same as <code>--quiet</code></dd>
<dt>-V</dt>
<dt>--version</dt>
<dd>Display copyright information and exit.</dd>
</dl>
<h3><a name="installationdirectories" id="installationdirectories">Installation
directories</a></h3>
<p>These options define the installation directory. The installation
tree depends on the selected layout.</p>
<dl>
<dt><code>--prefix=<var>PREFIX</var></code></dt>
<dd>Install architecture-independent files in <var>PREFIX</var>.
By default the installation directory is set to
<code>/usr/local/apache2</code>.</dd>
<dt><code>--exec-prefix=<var>EPREFIX</var></code></dt>
<dd>Install architecture-dependent files in <var>EPREFIX</var>.
By default the installation directory is set to the
<var>PREFIX</var> directory.</dd>
</dl>
<p>By default, <code>make install</code> will install all the files in
<code>/usr/local/apache2/bin</code>, <code>/usr/local/apache2/lib</code>
etc. You can specify an installation prefix other than
<code>/usr/local/apache2</code> using <code>--prefix</code>,
for instance <code>--prefix=$HOME</code>.</p>
<h4><a name="layout" id="layout">Define a directory layout</a></h4>
<dl>
<dt><code>--enable-layout=<var>LAYOUT</var></code></dt>
<dd>Configure the source code and build scripts to assume an
installation tree based on the layout <var>LAYOUT</var>. This allows
you to separately specify the locations for each type of file within
the Apache HTTP Server installation. The <code>config.layout</code>
file contains several example configurations, and you can also create
your own custom configuration following the examples. The different
layouts in this file are grouped into <code><Layout
FOO>...</Layout></code> sections and referred to by name as
in <code>FOO</code>. The default layout is <code>Apache</code>.</dd>
</dl>
<h4><a name="directoryfinetuning" id="directoryfinetuning">Fine tuning of the installation
directories</a></h4>
<p>For better control of the installation directories, use the options
below. Please note that the directory defaults are set by
<code>autoconf</code> and be overwritten by the corresponding layout
setting.</p>
<dl>
<dt><code>--bindir=<var>DIR</var></code></dt>
<dd>Install user executables in <var>DIR</var>. The user executables
are supporting programs like <code class="program"><a href="../programs/htpasswd.html">htpasswd</a></code>,
<code class="program"><a href="../programs/dbmmanage.html">dbmmanage</a></code>, etc. which are useful for site
administrators. By default <var>DIR</var> is set to
<code><var>EPREFIX</var>/bin</code>.</dd>
<dt><code>--datadir=<var>DIR</var></code></dt>
<dd>Install read-only architecture-independent data in <var>DIR</var>.
By default <code>datadir</code> is set to
<code><var>PREFIX</var>/share</code>. This option is offered by
<code>autoconf</code> and currently unused.</dd>
<dt><code>--includedir=<var>DIR</var></code></dt>
<dd>Install C header files in <var>DIR</var>. By default
<code>includedir</code> is set to
<code><var>EPREFIX</var>/include</code>.</dd>
<dt><code>--infodir=<var>DIR</var></code></dt>
<dd>Install info documentation in <var>DIR</var>.
By default <code>infodir</code> is set to
<code><var>PREFIX</var>/info</code>. This option is currently
unused.</dd>
<dt><code>--libdir=<var>DIR</var></code></dt>
<dd>Install object code libraries in <var>DIR</var>. By default
<code>libdir</code> is set to
<code><var>EPREFIX</var>/lib</code>.</dd>
<dt><code>--libexecdir=<var>DIR</var></code></dt>
<dd>Install the program executables (i.e., shared modules) in
<var>DIR</var>. By default <code>libexecdir</code> is set to
<code><var>EPREFIX</var>/libexec</code>.</dd>
<dt><code>--localstatedir=<var>DIR</var></code></dt>
<dd>Install modifiable single-machine data in <var>DIR</var>.
By default <code>localstatedir</code> is set to
<code><var>PREFIX</var>/var</code>. This option is offered by
<code>autoconf</code> and currently unused.</dd>
<dt><code>--mandir=<var>DIR</var></code></dt>
<dd>Install the man documentation in <var>DIR</var>. By default
<code>mandir</code> is set to
<code><var>EPREFIX</var>/man</code>.</dd>
<dt><code>--oldincludedir=<var>DIR</var></code></dt>
<dd>Install C header files for non-gcc in <var>DIR</var>.
By default <code>oldincludedir</code> is set to
<code>/usr/include</code>. This option is offered by
<code>autoconf</code> and currently unused.</dd>
<dt><code>--sbindir=<var>DIR</var></code></dt>
<dd>Install the system administrator executables in <var>DIR</var>.
Those are server programs like <code class="program"><a href="../programs/httpd.html">httpd</a></code>,
<code class="program"><a href="../programs/apachectl.html">apachectl</a></code>, <code class="program"><a href="../programs/suexec.html">suexec</a></code>, etc. which
are neccessary to run the Apache HTTP Server. By default
<code>sbindir</code> is set to
<code><var>EPREFIX</var>/sbin</code>.</dd>
<dt><code>--sharedstatedir=<var>DIR</var></code></dt>
<dd>Install modifiable architecture-independent data in <var>DIR</var>.
By default <code>sharedstatedir</code> is set to
<code><var>PREFIX</var>/com</code>. This option is offered by
<code>autoconf</code> and currently unused.</dd>
<dt><code>--sysconfdir=<var>DIR</var></code></dt>
<dd>Install read-only single-machine data like the server configuration
files <code>httpd.conf</code>, <code>mime.types</code>, etc. in
<var>DIR</var>. By default <code>sysconfdir</code> is set to
<code><var>PREFIX</var>/conf</code>.</dd>
</dl>
<h3><a name="systemtypes" id="systemtypes">System types</a></h3>
<p>These options are used to cross-compile the Apache HTTP Server to run on
another system. In normal cases, when building and running the server on
the same system, these options are not used.</p>
<dl>
<dt><code>--build=<var>BUILD</var></code></dt>
<dd>Defines the system type of the system on which the tools are being
built. It defaults to the result of the script
<code>config.guess</code>.</dd>
<dt><code>--host=<var>HOST</var></code></dt>
<dd>Defines the system type of the system on which the server will run.
<var>HOST</var> defaults to <var>BUILD</var>.</dd>
<dt><code>--target=<var>TARGET</var></code></dt>
<dd>Configure for building compilers for the system type
<var>TARGET</var>. It defaults to <var>HOST</var>. This option is
offered by <code>autoconf</code> and not necessary for the Apache HTTP
Server.</dd>
</dl>
<h3><a name="optionalfeatures" id="optionalfeatures">Optional Features</a></h3>
<p>These options are used to fine tune the features your HTTP server will
have.</p>
<h4><a name="generaloptfeat" id="generaloptfeat">General syntax</a></h4>
<p>Generally you can use the following syntax to enable or disable a
feature:</p>
<dl>
<dt><code>--disable-<var>FEATURE</var></code></dt>
<dd>Do not include <var>FEATURE</var>. This is the same as
<code>--enable-<var>FEATURE</var>=no</code>.</dd>
<dt><code>--enable-<var>FEATURE</var>[=<var>ARG</var>]</code></dt>
<dd>Include <var>FEATURE</var>. The default value for <var>ARG</var>
is <code>yes</code>.</dd>
<dt><code>--enable-<var>MODULE</var>=shared</code></dt>
<dd>The corresponding module will be build as DSO module.</dd>
<dt><code>--enable-<var>MODULE</var>=static</code></dt>
<dd>By default enabled modules are linked statically. You can force
this explicitly.</dd>
</dl>
<div class="note"><h3>Note</h3>
<code>configure</code> will not complain about
<code>--enable-<var>foo</var></code> even if <var>foo</var> doesn't
exist, so you need to type carefully.
</div>
<h4><a name="enabledmodules" id="enabledmodules">Modules enabled by default</a></h4>
<p>Some modules are compiled by default and have to be disabled
explicitly. Use the following options to remove discrete modules from
the compilation process.</p>
<dl>
<dt><code>--disable-actions</code></dt>
<dd>Disable action triggering on requests, which is provided by
<code class="module"><a href="../mod/mod_actions.html">mod_actions</a></code>.</dd>
<dt><code>--disable-alias</code></dt>
<dd>Disable the mapping of requests to different parts of the
filesystem, which is provided by <code class="module"><a href="../mod/mod_alias.html">mod_alias</a></code>.</dd>
<dt><code>--disable-asis</code></dt>
<dd>Disable support for as-is filetypes, which is provided by
<code class="module"><a href="../mod/mod_asis.html">mod_asis</a></code>.</dd>
<dt><code>--disable-auth</code></dt>
<dd>Disable user-based access control provided by
<code class="module"><a href="../mod/mod_auth.html">mod_auth</a></code>. This module provides for HTTP Basic
Authentication, where the usernames and passwords are stored in
plain text files.</dd>
<dt><code>--disable-autoindex</code></dt>
<dd>Disable the directory listing functionality provided by
<code class="module"><a href="../mod/mod_autoindex.html">mod_autoindex</a></code>.</dd>
<dt><code>--disable-access</code></dt>
<dd>Disable host-based access control provided by
<code class="module"><a href="../mod/mod_access.html">mod_access</a></code>.</dd>
<dt><code>--disable-cgi</code></dt>
<dd><code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code>, which provides support for CGI scripts,
is enabled by default when using a non-threaded MPM. Use this
option to disable CGI support.</dd>
<dt><code>--disable-cgid</code></dt>
<dd>When using the threaded MPMs <code class="module"><a href="../mod/worker.html">worker</a></code> or
<code class="module"><a href="../mod/perchild.html">perchild</a></code> support for CGI scripts is provided by
<code class="module"><a href="../mod/mod_cgid.html">mod_cgid</a></code> by default. To disable CGI support use
this option.</dd>
<dt><code>--disable-charset-lite</code></dt>
<dd>Disable character set translation provided by
<code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code>. This module will be installed by
default only on EBCDIC systems.</dd>
<dt><code>--disable-dir</code></dt>
<dd>Disable directory request handling provided by
<code class="module"><a href="../mod/mod_dir.html">mod_dir</a></code>.</dd>
<dt><code>--disable-env</code></dt>
<dd>Disable setting and clearing of environment variables, which is
provided by <code class="module"><a href="../mod/mod_env.html">mod_env</a></code>.</dd>
<dt><code>--disable-http</code></dt>
<dd>Disable the HTTP protocol handling. The <code>http</code>
module is a basic one, enabling the server to function as an
HTTP server. It is only useful to disable it if you want to use
another protocol module instead. <strong>Don't disable this
module unless you are really sure what you are doing.</strong>
<br />
Note: This module will always be linked statically.</dd>
<dt><code>--disable-imap</code></dt>
<dd>Disable support for server based imagemaps, which provided by
<code class="module"><a href="../mod/mod_imap.html">mod_imap</a></code>.</dd>
<dt><code>--disable-include</code></dt>
<dd>Disable Server Side Includes provided by
<code class="module"><a href="../mod/mod_include.html">mod_include</a></code>.</dd>
<dt><code>--disable-log-config</code></dt>
<dd>Disable the logging configuration provided by
<code class="module"><a href="../mod/mod_log_config.html">mod_log_config</a></code>. You won't be able to log requests
to the server without this module.</dd>
<dt><code>--disable-mime</code></dt>
<dd><code class="module"><a href="../mod/mod_mime.html">mod_mime</a></code> associates the requested filename's
extensions with the file's behavior and content (mime-type,
language, character set and encoding). Disabling the mapping of
file-extensions to MIME is normally not recommended.</dd>
<dt><code>--disable-negotiation</code></dt>
<dd>Disable content negotiation provided by
<code class="module"><a href="../mod/mod_negotiation.html">mod_negotiation</a></code>.</dd>
<dt><code>--disable-setenvif</code></dt>
<dd>Disable support for basing environment variables on headers,
which is provided by <code class="module"><a href="../mod/mod_setenvif.html">mod_setenvif</a></code>.</dd>
<dt><code>--disable-status</code></dt>
<dd>Disable the process/thread monitoring, which is provided by
<code class="module"><a href="../mod/mod_status.html">mod_status</a></code>.</dd>
<dt><code>--disable-userdir</code></dt>
<dd>Disable the mapping of requests to user-specific directories,
which is provided by <code class="module"><a href="../mod/mod_userdir.html">mod_userdir</a></code>.</dd>
</dl>
<h4><a name="disabledmodules" id="disabledmodules">Modules, disabled by default</a></h4>
<p>Some modules are compiled by default and have to be enabled
explicitly or by using the keywords <code>most</code> or
<code>all</code> (see <code>--enable-mods-shared</code> below for
further explanation) to be available. Therefore use the options
below.</p>
<dl>
<dt><code>--enable-auth-anon</code></dt>
<dd>Enable anonymous user access provided by
<code class="module"><a href="../mod/mod_auth_anon.html">mod_auth_anon</a></code>.</dd>
<dt><code>--enable-auth-dbm</code></dt>
<dd><code class="module"><a href="../mod/mod_auth_dbm.html">mod_auth_dbm</a></code> provides for HTTP Basic
Authentication, where the usernames and passwords are stored in DBM
type database files. Use this option to enable the module.</dd>
<dt><code>--enable-auth-digest</code></dt>
<dd>Enable RFC2617 Digest authentication provided by
<code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code>. This module uses plain text files
to store the credentials.</dd>
<dt><code>--enable-auth-ldap</code></dt>
<dd>Enable LDAP based authentication provided by
<code class="module"><a href="../mod/mod_auth_ldap.html">mod_auth_ldap</a></code>.</dd>
<dt><code>--enable-cache</code></dt>
<dd>Enable dynamic file caching provided by
<code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code>. This experimental module may be
interesting for servers with high load or caching proxy servers. At
least one storage management module (e.g.
<code class="module"><a href="../mod/mod_disk_cache.html">mod_disk_cache</a></code> or <code class="module"><a href="../mod/mod_mem_cache.html">mod_mem_cache</a></code>)
is also necessary.</dd>
<dt><code>--enable-cern-meta</code></dt>
<dd>Enable the CERN-type meta files support provided by
<code class="module"><a href="../mod/mod_cern_meta.html">mod_cern_meta</a></code>.</dd>
<dt><code>--enable-charset-lite</code></dt>
<dd>Enable character set translation provided by
<code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code>. This module will be installed by
default only on EBCDIC systems. On other systems, you have to enable
it.</dd>
<dt><code>--enable-dav</code></dt>
<dd>Enable the WebDAV protocol handling provided by
<code class="module"><a href="../mod/mod_dav.html">mod_dav</a></code>. Support for filesystem resources is
provided by the seperate module <code class="module"><a href="../mod/mod_dav_fs.html">mod_dav_fs</a></code>. This
module is also automatically enabled with
<code>--enable-dav</code>.<br />
Note: <code class="module"><a href="../mod/mod_dav.html">mod_dav</a></code> can only be used together with the
<code>http</code> protocol module.</dd>
<dt><code>--enable-dav-fs</code></dt>
<dd>Enable DAV support for filesystem resources, which is provided by
<code class="module"><a href="../mod/mod_dav_fs.html">mod_dav_fs</a></code>. This module is a provider for the
<code class="module"><a href="../mod/mod_dav.html">mod_dav</a></code> module, so you should also use
<code>--enable-dav</code>.</dd>
<dt><code>--enable-deflate</code></dt>
<dd>Enable deflate transfer encoding provided by
<code class="module"><a href="../mod/mod_deflate.html">mod_deflate</a></code>.</dd>
<dt><code>--enable-disk-cache</code></dt>
<dd>Enable disk caching provided by
<code class="module"><a href="../mod/mod_disk_cache.html">mod_disk_cache</a></code>.</dd>
<dt><code>--enable-expires</code></dt>
<dd>Enable <code>Expires</code> header control provided by
<code class="module"><a href="../mod/mod_expires.html">mod_expires</a></code>.</dd>
<dt><code>--enable-ext-filter</code></dt>
<dd>Enable the external filter support provided by
<code class="module"><a href="../mod/mod_ext_filter.html">mod_ext_filter</a></code>.</dd>
<dt><code>--enable-file-cache</code></dt>
<dd>Enable the file cache provided by
<code class="module"><a href="../mod/mod_file_cache.html">mod_file_cache</a></code>.</dd>
<dt><code>--enable-headers</code></dt>
<dd>Enable control of HTTP headers provided by
<code class="module"><a href="../mod/mod_headers.html">mod_headers</a></code>.</dd>
<dt><code>--enable-info</code></dt>
<dd>Enable the server information provided by
<code class="module"><a href="../mod/mod_info.html">mod_info</a></code>.</dd>
<dt><code>--enable-ldap</code></dt>
<dd>Enable LDAP caching and connection pooling services provided by
<code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code>.</dd>
<dt><code>--enable-logio</code></dt>
<dd>Enable logging of input and output bytes including headers provided
by <code class="module"><a href="../mod/mod_logio.html">mod_logio</a></code>.</dd>
<dt><code>--enable-mem-cache</code></dt>
<dd>Enable memory caching provided by
<code class="module"><a href="../mod/mod_mem_cache.html">mod_mem_cache</a></code>.</dd>
<dt><code>--enable-mime-magic</code></dt>
<dd>Enable automatical determining of MIME types, which is provided by
<code class="module"><a href="../mod/mod_mime_magic.html">mod_mime_magic</a></code>.</dd>
<dt><code>--enable-isapi</code></dt>
<dd>Enable the isapi extension support provided by
<code class="module"><a href="../mod/mod_isapi.html">mod_isapi</a></code>.</dd>
<dt><code>--enable-proxy</code></dt>
<dd>Enable the proxy/gateway functionality provided by
<code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>. The proxying capabilities for
<code>CONNECT</code>, <code>FTP</code> and <code>HTTP</code> are
provided by the seperate modules <code class="module"><a href="../mod/mod_proxy_connect.html">mod_proxy_connect</a></code>,
<code class="module"><a href="../mod/mod_proxy_ftp.html">mod_proxy_ftp</a></code> and <code class="module"><a href="../mod/mod_proxy_http.html">mod_proxy_http</a></code>.
These three modules are also automatically enabled with
<code>--enable-proxy</code>.</dd>
<dt><code>--enable-proxy-connect</code></dt>
<dd>Enable proxy support for <code>CONNECT</code> request handling,
which is provided by <code class="module"><a href="../mod/mod_proxy_connect.html">mod_proxy_connect</a></code>. This module
is an extension for the <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> module, so you
should also use <code>--enable-proxy</code>.</dd>
<dt><code>--enable-proxy-ftp</code></dt>
<dd>Enable proxy support for <code>FTP</code> requests, which is
provided by <code class="module"><a href="../mod/mod_proxy_ftp.html">mod_proxy_ftp</a></code>.. This module
is an extension for the <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> module, so you
should also use <code>--enable-proxy</code>.</dd>
<dt><code>--enable-proxy-http</code></dt>
<dd>Enable proxy support for <code>HTTP</code> requests, which is
provided by <code class="module"><a href="../mod/mod_proxy_http.html">mod_proxy_http</a></code>. This module
is an extension for the <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> module, so you
should also use <code>--enable-proxy</code>.</dd>
<dt><code>--enable-rewrite</code></dt>
<dd>Enable rule based URL manipulation provided by
<code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code>.</dd>
<dt><code>--enable-so</code></dt>
<dd>Enable DSO capability provided by <code class="module"><a href="../mod/mod_so.html">mod_so</a></code>. This
module will be automatically enabled if you use the
<code>--enable-mods-shared</code> option.</dd>
<dt><code>--enable-speling</code></dt>
<dd>Enable the functionality to correct common URL misspellings, which
is provided by <code class="module"><a href="../mod/mod_speling.html">mod_speling</a></code>.</dd>
<dt><code>--enable-ssl</code></dt>
<dd>Enable support for SSL/TLS provided by
<code class="module"><a href="../mod/mod_ssl.html">mod_ssl</a></code>.</dd>
<dt><code>--enable-unique-id</code></dt>
<dd>Enable the generation of per-request unique ids, which is provided
by <code class="module"><a href="../mod/mod_unique_id.html">mod_unique_id</a></code>.</dd>
<dt><code>--enable-usertrack</code></dt>
<dd>Enable user-session tracking provided by
<code class="module"><a href="../mod/mod_usertrack.html">mod_usertrack</a></code>.</dd>
<dt><code>--enable-vhost-alias</code></dt>
<dd>Enable mass virtual hosting provided by
<code class="module"><a href="../mod/mod_vhost_alias.html">mod_vhost_alias</a></code>.</dd>
</dl>
<h4><a name="developermodules" id="developermodules">Modules for developers</a></h4>
<p>The following modules are useful only for developers and testing
purposes and are disabled by default. Use the following options to
enable them. If you are not sure whether you need one of these
modules, omit them.</p>
<dl>
<dt><code>--enable-bucketeer</code></dt>
<dd>Enable the manipulation filter for buckets, which is provided by
<code>mod_bucketeer</code>.</dd>
<dt><code>--enable-case-filter</code></dt>
<dd>Enable the example uppercase conversion output filter support of
<code>mod_case_filter</code>.</dd>
<dt><code>--enable-case-filter-in</code></dt>
<dd>Enable the example uppercase conversion input filter support of
<code>mod_case_filter_in</code>.</dd>
<dt><code>--enable-echo</code></dt>
<dd>Enable the ECHO server provided by
<code class="module"><a href="../mod/mod_echo.html">mod_echo</a></code>.</dd>
<dt><code>--enable-example</code></dt>
<dd>Enable the example and demo module
<code class="module"><a href="../mod/mod_example.html">mod_example</a></code>.</dd>
<dt><code>--enable-optional-fn-export</code></dt>
<dd>Enable the example for an optional function exporter, which is
provided by <code>mod_optional_fn_export</code>.</dd>
<dt><code>--enable-optional-fn-import</code></dt>
<dd>Enable the example for an optional function importer, which is
provided by <code>mod_optional_fn_import</code>.</dd>
<dt><code>--enable-optional-hook-export</code></dt>
<dd>Enable the example for an optional hook exporter, which is provided
by <code>mod_optional_hook_export</code>.</dd>
<dt><code>--enable-optional-hook-import</code></dt>
<dd>Enable the example optional hook importer, which is provided by
<code>mod_optional_hook_import</code>.</dd>
</dl>
<h4><a name="modules" id="modules">MPMs and third-party modules</a></h4>
<p>To add the necessary Multi Processing Module and additional third-party
modules use the following options:</p>
<dl>
<dt><code>--with-module=<var>module-type</var>:<var>module-file</var>[,
<var>module-type</var>:<var>module-file</var>]</code></dt>
<dd><p>Add one or more third-party modules to the list of statically linked
modules. The module source file <code><var>module-file</var></code>
will be searched in the <code>modules/<var>module-type</var></code>
subdirectory of your Apache HTTP server source tree. If it is not found
there <code>configure</code> is considering <var>module-file</var> to be
an absolute file path and tries to copy the source file into the
<var>module-type</var> subdirectory. If the subdirectory doesn't
exist it will be created and populated with a standard
<code>Makefile.in</code>.</p>
<p>This option is useful to add small external modules consisting of
one source file. For more complex modules you should read the
vendor's documentation.</p>
<div class="note"><h3>Note</h3>
If you want to build a DSO module instead of a statically linked
use <code class="program"><a href="../programs/apxs.html">apxs</a></code>.</div>
</dd>
<dt><code>--with-mpm=MPM</code></dt>
<dd>Choose the process model for your server. You have to select
exactly one <a href="../mpm.html">Multi-Processing Module</a>.
Otherwise the <a href="../mpm.html#defaults">default MPM</a> for
your operating system will be taken. Possible MPMs are
<code class="module"><a href="../mod/beos.html">beos</a></code>, <code class="module"><a href="../mod/leader.html">leader</a></code>,
<code class="module"><a href="../mod/mpmt_os2.html">mpmt_os2</a></code>, <code class="module"><a href="../mod/perchild.html">perchild</a></code>,
<code class="module"><a href="../mod/prefork.html">prefork</a></code>, <code class="module"><a href="../mod/threadpool.html">threadpool</a></code> and
<code class="module"><a href="../mod/worker.html">worker</a></code>.</dd>
</dl>
<h4><a name="otheroptfeat" id="otheroptfeat">Cumulative and other options</a></h4>
<dl>
<dt><code>--enable-maintainer-mode</code></dt>
<dd>Turn on debugging and compile time warnings.</dd>
<dt><code>--enable-mods-shared=<var>MODULE-LIST</var></code></dt>
<dd>
<p>Defines a list of modules to be enabled and build as dynamic
shared modules. This mean, these module have to be loaded
dynamically by using the <code class="directive"><a href="../mod/mod_so.html#loadmodule">LoadModule</a></code> directive.</p>
<p><var>MODULE-LIST</var> is a space separated list of modulenames
enclosed by quotation marks. The module names are given without the
preceding <code>mod_</code>. For example:</p>
<div class="example"><p><code>
--enable-mods-shared='headers rewrite dav'
</code></p></div>
<p>Additionally you can use the special keywords <code>all</code> and
<code>most</code>. For example,</p>
<div class="example"><p><code>
--enable-mods-shared=most
</code></p></div>
<p>will compile most modules and build them as DSO modules.
</p>
</dd>
<dt><code>--enable-modules=<var>MODULE-LIST</var></code></dt>
<dd>This option behaves similar to <code>--enable-mods-shared</code>,
but will link the given modules statically. This mean, these modules
will always be present while running <code class="program"><a href="../programs/httpd.html">httpd</a></code>. They need
not be loaded with <code class="directive"><a href="../mod/mod_so.html#loadmodule">LoadModule</a></code>.</dd>
<dt><code>--enable-v4-mapped</code></dt>
<dd>Allow IPv6 sockets to handle IPv4 connections.</dd>
<dt><code>--with-port=<var>PORT</var></code></dt>
<dd>This defines the port on which <code class="program"><a href="../programs/httpd.html">httpd</a></code> will listen.
This port number is used when generating the configuration file
<code>httpd.conf</code>. The default is 80.</dd>
<dt><code>--with-program-name</code></dt>
<dd>Define an alternative executable name. The default is
<code>httpd</code>.</dd>
</dl>
<h3><a name="packages" id="packages">Optional packages</a></h3>
<p>These options are used to define optional packages.</p>
<h4><a name="generalpackages" id="generalpackages">General syntax</a></h4>
<p>Generally you can use the following syntax to define an optional
package:</p>
<dl>
<dt><code>--with-<var>PACKAGE</var>[=<var>ARG</var>]</code></dt>
<dd>Use the package <var>PACKAGE</var>. The default value for
<var>ARG</var> is <code>yes</code>.</dd>
<dt><code>--without-<var>PACKAGE</var></code></dt>
<dd>Do not use the package <var>PACKAGE</var>. This is the same as
<code>--with-<var>PACKAGE</var>=no</code>. This option is provided by
<code>autoconf</code> but not very useful for the Apache HTTP
Server.</dd>
</dl>
<h4><a name="packageopt" id="packageopt">Specific packages</a></h4>
<dl>
<dt><code>--with-apr=<var>DIR</var>|<var>FILE</var></code></dt>
<dd>The Apache Portable Runtime (APR) is part of the httpd
source distribution and will automatically be build together with the
HTTP server. If you want to use an already installed APR instead you
have to tell <code>configure</code> the path to the
<code>apr-config</code> script. You may set the absolute path and name
or the directory to the installed APR. <code>apr-config</code> must
exist within this directory or the subdirectory
<code>bin</code>.</dd>
<dt><code>--with-apr-util=<var>DIR</var>|<var>FILE</var></code></dt>
<dd>The Apache Portable Runtime Utilities (APU) are part of the
httpd source distribution and will automatically be build
together with the HTTP server. If you want to use an already installed
APU instead you have to tell <code>configure</code> the path to the
<code>apu-config</code> script. You may set the absolute path and name
or the directory to the installed APU. <code>apu-config</code> must
exist within this directory or the subdirectory
<code>bin</code>.</dd>
<dt><code>--with-ssl=<var>DIR</var></code></dt>
<dd>If <code class="module"><a href="../mod/mod_ssl.html">mod_ssl</a></code> has been enabled <code>configure</code>
searches for an installed OpenSSL. You can set the directory path
to the SSL/TLS toolkit instead.</dd>
<dt><code>--with-z=<var>DIR</var></code></dt>
<dd><code>configure</code> searches automatically for an installed
<code>zlib</code> library if your source configuration requires one
(e.g., when <code class="module"><a href="../mod/mod_deflate.html">mod_deflate</a></code> is enabled). You can set the
directory path to the compression library instead.</dd>
</dl>
<p>Several features of the Apache HTTP Server, including
<code class="module"><a href="../mod/mod_authn_dbm.html">mod_authn_dbm</a></code> and <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code>'s DBM
<code class="directive"><a href="../mod/mod_rewrite.html#rewritemap">RewriteMap</a></code> use simple
key/value databases for quick lookups of information. SDBM is included
in the APU, so this database is always available. If you would like to
use other database types, use the following options to enable
them:</p>
<dl>
<dt><code>--with-gdbm[=<var>path</var>]</code></dt>
<dd>If no <var>path</var> is specified, <code>configure</code> will
search for the include files and libraries of a GNU DBM
installation in the usual search paths. An explicit
<var>path</var> will cause <code>configure</code> to look in
<code><var>path</var>/lib</code> and
<code><var>path</var>/include</code> for the relevant files.
Finally, the <var>path</var> may specify specific include and
library paths separated by a colon.</dd>
<dt><code>--with-ndbm[=<var>path</var>]</code></dt>
<dd>Like <code>--with-gdbm</code>, bur searches for a New DBM
installation.</dd>
<dt><code>--with-berkeley-db[=<var>path</var>]</code></dt>
<dd>Like <code>--with-gdbm</code>, but searches for a Berkeley DB
installation.</dd>
</dl>
<div class="note"><h3>Note</h3>
<p>The DBM options are provided by the APU and passed through to its
configuration script. They are useless when using an already
installed APU defined by <code>--with-apr-util</code>.</p>
<p>You may use more then one DBM implementation together with your
HTTP server. The appropriated DBM type will be configured within
the runtime configuration at each time.</p>
</div>
<h3><a name="supportopt" id="supportopt">Options for support programs</a></h3>
<dl>
<dt><code>--enable-static-support</code></dt>
<dd>Build a statically linked version of the support binaries. This
means, a stand-alone executable will be built with all the necessary
libraries integrated. Otherwise the support binaries are linked
dynamically by default.</dd>
<dt><code>--enable-suexec</code></dt>
<dd>Use this option to enable <code class="program"><a href="../programs/suexec.html">suexec</a></code>, which allows you to set
uid and gid for spawned processes. <strong>Do not use this
option unless you understand all the security implications of
running a suid binary on your server.</strong> Further options
to configure <code class="program"><a href="../programs/suexec.html">suexec</a></code> are described <a href="#suexec">below</a>.</dd>
</dl>
<p>It is possible to create a statically linked binary of a single
support program by using the following options:</p>
<dl>
<dt><code>--enable-static-ab</code></dt>
<dd>Build a statically linked version of <code class="program"><a href="../programs/ab.html">ab</a></code>.</dd>
<dt><code>--enable-static-checkgid</code></dt>
<dd>Build a statically linked version of <code>checkgid</code>.</dd>
<dt><code>--enable-static-htdbm</code></dt>
<dd>Build a statically linked version of <code class="program"><a href="../programs/htdbm.html">htdbm</a></code>.</dd>
<dt><code>--enable-static-htdigest</code></dt>
<dd>Build a statically linked version of <code class="program"><a href="../programs/htdigest.html">htdigest</a></code>.</dd>
<dt><code>--enable-static-htpasswd</code></dt>
<dd>Build a statically linked version of <code class="program"><a href="../programs/htpasswd.html">htpasswd</a></code>.</dd>
<dt><code>--enable-static-logresolve</code></dt>
<dd>Build a statically linked version of <code class="program"><a href="../programs/logresolve.html">logresolve</a></code>.</dd>
<dt><code>--enable-static-rotatelogs</code></dt>
<dd>Build a statically linked version of <code class="program"><a href="../programs/rotatelogs.html">rotatelogs</a></code>.</dd>
</dl>
<h4><a name="suexec" id="suexec"><code>suexec</code> configuration options</a></h4>
<p>The following options are used to fine tune the behavior of
<code class="program"><a href="../programs/suexec.html">suexec</a></code>. See <a href="suexec.html#install">Configuring and installing suEXEC</a> or further information.</p>
<dl>
<dt><code>--with-suexec-bin</code></dt>
<dd>This defines the path to <code class="program"><a href="../programs/suexec.html">suexec</a></code> binary.
Default is <code>--sbindir</code> (see <a href="#directoryfinetuning">Fine tuning of installation
directories</a>).</dd>
<dt><code>--with-suexec-caller</code></dt>
<dd>This defines the user allowed to call <code class="program"><a href="../programs/suexec.html">suexec</a></code>.
It should be the same as the user under which
<code class="program"><a href="../programs/httpd.html">httpd</a></code> normally runs.</dd>
<dt><code>--with-suexec-docroot</code></dt>
<dd>This defines the directory tree under which <code class="program"><a href="../programs/suexec.html">suexec</a></code> access is allowed for executables. Default value is
<code>--datadir/htdocs</code>.</dd>
<dt><code>--with-suexec-gidmin</code></dt>
<dd>Define this as the lowest GID allowed to be a target user for
<code class="program"><a href="../programs/suexec.html">suexec</a></code>. The default value is 100.</dd>
<dt><code>--with-suexec-logfile</code></dt>
<dd>This defines the filename of the <code class="program"><a href="../programs/suexec.html">suexec</a></code> logfile.
By default the logfile is named <code>suexec_log</code> and located in
<code>--logfiledir</code>.</dd>
<dt><code>--with-suexec-safepath</code></dt>
<dd>Define the value of the environment variable <code>PATH</code> to
be set for processes started by <code class="program"><a href="../programs/suexec.html">suexec</a></code>. Default
value is <code>/usr/local/bin:/usr/bin:/bin</code>.</dd>
<dt><code>--with-suexec-userdir</code></dt>
<dd>This defines the subdirectory under the user's directory that
contains all executables for which <code class="program"><a href="../programs/suexec.html">suexec</a></code> access
is allowed. This setting is necessary when you want to use
<code class="program"><a href="../programs/suexec.html">suexec</a></code> together with user-specific directories (as
provided by <code class="module"><a href="../mod/mod_userdir.html">mod_userdir</a></code>). The default is
<code>public_html</code>.</dd>
<dt><code>--with-suexec-uidmin</code></dt>
<dd>Define this as the lowest UID allowed to be a target user for
<code class="program"><a href="../programs/suexec.html">suexec</a></code>. The default value is 100.</dd>
<dt><code>--with-suexec-umask</code></dt>
<dd>Set <code>umask</code> for processes started by
<code class="program"><a href="../programs/suexec.html">suexec</a></code>. It defaults to your system settings.</dd>
</dl>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="env" id="env">Environment variables</a></h2>
<p>There are some useful environment variables to override the choices made by
<code>configure</code> or to help it to find libraries and programs with
nonstandard names or locations.</p>
<dl>
<dt><code>CC</code></dt>
<dd>Define the C compiler command to be used for compilation.</dd>
<dt><code>CFLAGS</code></dt>
<dd>Set C compiler flags you want to use for compilation.</dd>
<dt><code>CPP</code></dt>
<dd>Define the C preprocessor command to be used.</dd>
<dt><code>CPPFLAGS</code></dt>
<dd>Set C/C++ preprocessor flags, e.g. <code>-I<var>includedir</var></code>
if you have headers in a nonstandard directory <var>includedir</var>.</dd>
<dt><code>LDFLAGS</code></dt>
<dd>Set linker flags, e.g. <code>-L<var>libdir</var></code> if you have
libraries in a nonstandard directory <var>libdir</var>.</dd>
</dl>
</div></div>
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