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    <p>There are many important points to consider before you begin compiling
    Apache HTTP Server (httpd). See <a href="windows.html">Using Apache HTTP
    Server on Microsoft Windows</a> before you begin.</p>

    <p>httpd can be built on Windows using a cmake-based build system or with
    Visual Studio project files maintained by httpd developers.  The cmake-based
    build system directly supports more versions of Visual Studio but currently
    has considerable functional limitations.</p>

  </div>
<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#vstudio">Building httpd with the included Visual Studio project files</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#cmake">Building httpd with cmake</a></li>
</ul><h3>See also</h3><ul class="seealso"><li><a href="#comments_section">Comments</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="vstudio" id="vstudio">Building httpd with the included Visual Studio project files</a></h2>
  

  <h3><a name="requirements" id="requirements">Requirements</a></h3>

    

    <p>Compiling Apache requires the following environment to be
    properly installed:</p>

    <ul>
      <li>
        <p>Disk Space</p>

        <p>Make sure you have at least 200 MB of free disk space
        available. After installation Apache requires approximately
        80 MB of disk space, plus space for log and cache files,
        which can grow rapidly. The actual disk space requirements
        will vary considerably based on your chosen configuration and
        any third-party modules or libraries, especially when OpenSSL
        is also built.  Because many files are text and very easily
        compressed, NTFS filesystem compression cuts these requirements
        in half.</p>
      </li>

      <li>
        <p>Appropriate Patches</p>

        <p>The httpd binary is built with the help of several patches to
        third party packages, which ensure the released code is buildable
        and debuggable.  These patches are available and distributed from <a href="http://www.apache.org/dist/httpd/binaries/win32/patches_applied/">http://www.apache.org/dist/httpd/binaries/win32/patches_applied/</a>
        and are recommended to be applied to obtain identical results as the
        "official" ASF distributed binaries.</p>
      </li>

      <li>
        <p>Microsoft Visual C++ 6.0 (Visual Studio 97) or later.</p>

        <p>Apache can be built using the command line tools, or from
        within the Visual Studio IDE Workbench.  The command line
        build requires the environment to reflect the <code>PATH</code>,
        <code>INCLUDE</code>, <code>LIB</code> and other variables
        that can be configured with the <code>vcvars32.bat</code> script.</p>

        <div class="note">You may want the Visual Studio Processor Pack for your older
        version of Visual Studio, or a full (not Express) version of newer
        Visual Studio editions, for the ml.exe assembler.  This will allow
        you to build OpenSSL, if desired, using the more efficient assembly
        code implementation.</div>

        <div class="note">Only the Microsoft compiler tool chain is actively supported by
        the active httpd contributors.  Although the project regularly accepts
        patches to ensure MinGW and other alternative builds work and improve
        upon them, they are not actively maintained and are often broken in
        the course of normal development.</div>
      </li>

      <li>
        <p>Updated Microsoft Windows Platform SDK, February 2003 or later.</p>

        <p>An appropriate Windows Platform SDK is included by default in the
        full (not express/lite) versions  of Visual C++ 7.1 (Visual Studio 2002)
        and later, these users can ignore these steps unless explicitly choosing
        a newer or different version of the Platform SDK.</p>

        <p>To use Visual C++ 6.0 or 7.0 (Studio 2000 .NET), the Platform SDK
        environment must be prepared using the <code>setenv.bat</code>
        script (installed by the Platform SDK) before starting the command
        line build or launching the msdev/devenv GUI environment.  Installing
        the Platform SDK for Visual Studio Express versions (2003 and later)
        should adjust the default environment appropriately.</p>

        <div class="example"><p><code>
          "c:\Program Files\Microsoft Visual Studio\VC98\Bin\VCVARS32"<br />
          "c:\Program Files\Platform SDK\setenv.bat"
        </code></p></div>
      </li>

      <li>
        <p>Perl and awk</p>

        <p>Several steps recommended here require a perl interpreter during
        the build preparation process, but it is otherwise not required.</p>

        <p>To install Apache within the build system, several files are
        modified using the <code>awk.exe</code> utility. awk was chosen since
        it is a very small download (compared with Perl or WSH/VB) and
        accomplishes the task of modifying configuration files upon
        installation.  Brian Kernighan's
        <a href="http://www.cs.princeton.edu/~bwk/btl.mirror/">http://www.cs.princeton.edu/~bwk/btl.mirror/</a>
        site has a compiled native Win32 binary,
        <a href="http://www.cs.princeton.edu/~bwk/btl.mirror/awk95.exe">http://www.cs.princeton.edu/~bwk/btl.mirror/awk95.exe</a> which
        you must save with the name <code>awk.exe</code> (rather than
        <code>awk95.exe</code>).</p>

        <div class="note">If awk.exe is not found, Makefile.win's install target
        will not perform substitutions in the installed .conf files.
        You must manually modify the installed .conf files to allow
        the server to start.  Search and replace all "@token@" tags
        as appropriate.</div>

        <div class="note">The Visual Studio IDE will only find <code>awk.exe</code>
        from the PATH, or executable path specified in the menu option
        Tools -&gt; Options -&gt; (Projects -&gt;) Directories.  Ensure
        awk.exe is in your system path.</div>

        <div class="note">Also note that if you are using Cygwin tools
        (<a href="http://www.cygwin.com/">http://www.cygwin.com/</a>)
        the awk utility is named <code>gawk.exe</code> and that the file
        <code>awk.exe</code> is really a symlink to the <code>gawk.exe</code>
        file. The Windows command shell does not recognize symlinks, and
        because of this building InstallBin will fail. A workaround is
        to delete <code>awk.exe</code> from the cygwin installation and
        copy <code>gawk.exe</code> to <code>awk.exe</code>.  Also note the
        cygwin/mingw ports of gawk 3.0.x were buggy, please upgrade to 3.1.x
        before attempting to use any gawk port.</div>
      </li>

      <li>
        <p>[Optional] zlib library (for <code class="module"><a href="../mod/mod_deflate.html">mod_deflate</a></code>)</p>

        <p>Zlib must be installed into a <code>srclib</code> subdirectory named
        <code>zlib</code>.  This must be built in-place.  Zlib can be obtained
        from <a href="http://www.zlib.net/">http://www.zlib.net/</a> -- the
        <code class="module"><a href="../mod/mod_deflate.html">mod_deflate</a></code> is confirmed to work correctly with
        version 1.2.3.</p>

        <div class="example"><p><code>
          nmake -f win32\Makefile.msc<br />
          nmake -f win32\Makefile.msc test
        </code></p></div>
      </li>

      <li>
        <p>[Optional] OpenSSL libraries (for <code class="module"><a href="../mod/mod_ssl.html">mod_ssl</a></code>
        and <code>ab.exe</code> with ssl support)</p>

        <div class="note">The OpenSSL library is cryptographic software.  The country
        in which you currently reside may have restrictions on the import,
        possession, use, and/or re-export to another country, of encryption
        software.  BEFORE using any encryption software, please check your
        country's laws, regulations and policies concerning the import,
        possession, or use, and re-export of encryption software, to see
        if this is permitted.  See
        <a href="http://www.wassenaar.org/">http://www.wassenaar.org/</a>
        for more information.</div>

        <p>Configuring and building OpenSSL requires perl to be installed.</p>

        <p>OpenSSL must be installed into a <code>srclib</code> subdirectory
        named <code>openssl</code>, obtained from
        <a href="http://www.openssl.org/source/">http://www.openssl.org/source/</a>, in order to compile
        <code class="module"><a href="../mod/mod_ssl.html">mod_ssl</a></code> or the <code>abs.exe</code> project, which
        is ab.c with SSL support enabled.  To prepare OpenSSL to be linked
        to Apache mod_ssl or abs.exe, and disable patent encumbered features
        in OpenSSL,  you might use the following build commands:</p>

        <div class="example"><p><code>
          perl Configure no-rc5 no-idea enable-mdc2 enable-zlib VC-WIN32
               -Ipath/to/srclib/zlib -Lpath/to/srclib/zlib<br />
          ms\do_masm.bat<br />
          nmake -f ms\ntdll.mak
        </code></p></div>

        <div class="note">It is not advisable to use zlib-dynamic, as that transfers
        the cost of deflating SSL streams to the first request which must
        load the zlib dll.  Note the suggested patch enables the -L flag to
        work with windows builds, corrects the name of zdll.lib and ensures
        .pdb files are generated for troubleshooting.  If the assembler is
        not installed, you would add no-asm above and use ms\do_ms.bat
        instead of the ms\do_masm.bat script.</div>
      </li>

      <li>
        <p>[Optional] Database libraries (for <code class="module"><a href="../mod/mod_dbd.html">mod_dbd</a></code>
        and <code class="module"><a href="../mod/mod_authn_dbm.html">mod_authn_dbm</a></code>)</p>

        <p>The apr-util library exposes dbm (keyed database) and dbd (query
        oriented database) client functionality to the httpd server and its
        modules, such as authentication and authorization.  The sdbm dbm and
        odbc dbd providers are compiled unconditionally.</p>

        <p>The dbd support includes the Oracle instantclient package, MySQL,
        PostgreSQL and sqlite.  To build these all, for example, set up the
        LIB to include the library path, INCLUDE to include the headers path,
        and PATH to include the dll bin path of all four SDK's, and set the
        DBD_LIST environment variable to inform the build which client driver
        SDKs are installed correctly, e.g.;</p>

        <div class="example"><p><code>
          set DBD_LIST=sqlite3 pgsql oracle mysql
        </code></p></div>

        <p>Similarly, the dbm support can be extended with DBM_LIST to
        build a Berkeley DB provider (db) and/or gdbm provider, by similarly
        configuring LIB, INCLUDE and PATH first to ensure the client library
        libs and headers are available.</p>

        <div class="example"><p><code>
          set DBM_LIST=db gdbm
        </code></p></div>

        <div class="note">Depending on the choice of database distributions, it may be
        necessary to change the actual link target name (e.g. gdbm.lib vs.
        libgdb.lib) that are listed in the corresponding .dsp/.mak files
        within the directories srclib\apr-util\dbd or ...\dbm.</div>

        <p>See the README-win32.txt file for more hints on obtaining the
        various database driver SDKs.</p>
      </li>
    </ul>

  

  <h3><a name="unixsrcbuild" id="unixsrcbuild">Building from Unix sources</a></h3>

    

    <p>The policy of the Apache HTTP Server project is to only release Unix sources.
    Windows source packages made available for download have been supplied by 
    volunteers and may not be available for every release. You can still build 
    the server on Windows from the Unix source tarball with just a few additional
    steps.</p>

    <ol>
    	<li>Download and unpack the Unix source tarball for the latest version.</li>
    	<li>Download and unpack the Unix source tarball for latest version of
        APR, AR-Util and APR-Iconv, place these sources in directories  httpd-2.x.x\srclib\apr, httpd-2.x.x\srclib\apr-util and httpd-2.x.x\srclib\apr-iconv</li>
    	<li>Open a Command Prompt and CD to the httpd-2.x.x folder</li>
    	<li>Run the line endings conversion utility at the prompt;</li>
    </ol>

    <div class="example"><p><code>
      perl srclib\apr\build\lineends.pl
    </code></p></div>

    <p>You can now build the server with the Visual Studio development 
    environment using the IDE. Command-Line builds of the server are not 
    possible from Unix sources unless you export .mak files as explained 
    below.
    </p>

  

  <h3><a name="commandbuild" id="commandbuild">Command-Line Build</a></h3>

    

    <p><code>Makefile.win</code> is the top level Apache makefile.
    To compile Apache on Windows, simply use one of the following commands
    to build the <code>release</code> or <code>debug</code> flavor:</p>

    <div class="example"><p><code>
      nmake /f Makefile.win _apacher<br /><br />
      nmake /f Makefile.win _apached
    </code></p></div>

    <p>Either command will compile Apache. The latter will disable
    optimization of the resulting files, making it easier to single
    step the code to find bugs and track down problems.</p>

    <p>You can add your apr-util dbd and dbm provider choices with the
    additional make (environment) variables DBD_LIST and DBM_LIST,
    see the comments about [Optional] Database libraries, above.
    Review the initial comments in Makefile.win for additional options
    that can be provided when invoking the build.</p>

  

  <h3><a name="workspacebuild" id="workspacebuild">Developer Studio Workspace IDE Build</a></h3>

    

    <p>Apache can also be compiled using VC++'s Visual Studio
    development environment. To simplify this process, a
    Visual Studio workspace, <code>Apache.dsw</code>, is provided.
    This workspace exposes the entire list of working <code>.dsp</code>
    projects that are required for the complete Apache binary release.
    It includes dependencies between the projects to assure that they
    are built in the appropriate order.</p>

    <p>Open the <code>Apache.dsw</code> workspace, and select
    <code>InstallBin</code> (<code>Release</code> or <code>Debug</code> build,
    as desired) as the Active Project. <code>InstallBin</code> causes all
    related project to be built, and then invokes <code>Makefile.win</code> to
    move the compiled executables and dlls. You may personalize the
    <code>INSTDIR=</code> choice by changing <code>InstallBin</code>'s Settings,
    General tab, Build command line entry. <code>INSTDIR</code> defaults to the
    <code>/Apache2</code> directory. If you only want a test compile (without
    installing) you may build the <code>BuildBin</code> project instead.</p>

    <p>The <code>.dsp</code> project files are distributed in Visual Studio 6.0
    (98) format. Visual C++ 5.0 (97) will recognize them. Visual Studio
    2002 (.NET) and later users must convert <code>Apache.dsw</code> plus
    the <code>.dsp</code> files into an <code>Apache.sln</code> plus
    <code>.msproj</code> files.  Be sure you reconvert the <code>.msproj</code>
    file again if its source <code>.dsp</code> file changes! This is really
    trivial, just open <code>Apache.dsw</code> in the VC++ 7.0 IDE once again
    and reconvert.</p>

    <div class="note">There is a flaw in the .vcproj conversion of .dsp files.  devenv.exe
    will mis-parse the /D flag for RC flags containing long quoted /D'efines
    which contain spaces.  The command:
    <div class="example"><p><code>
      perl srclib\apr\build\cvtdsp.pl -2005
    </code></p></div>
    will convert the /D flags for RC flags to use an alternate, parseable
    syntax; unfortunately this syntax isn't supported by Visual Studio 97
    or its exported .mak files.  These /D flags are used to pass the long
    description of the mod_apachemodule.so files to the shared .rc resource
    version-identifier build.</div>

	<div class="note"><strong>Building with OpenSSL 1.1.0 and up</strong>
    Due to difference in the build structure of OpenSSL begining with version
    1.1.0 you will need to convert the dsp files affected with cvtdsp.pl from
    APR 1.6 or greater.  The command:
    <div class="example"><p><code>
      perl srclib\apr\build\cvtdsp.pl -ossl11
    </code></p></div>
	</div>

    <p>Visual Studio 2002 (.NET) and later users should also use the Build
    menu, Configuration Manager dialog to uncheck both the <code>Debug</code>
    and <code>Release</code> Solution modules <code>abs</code>,
    <code class="module"><a href="../mod/mod_deflate.html">mod_deflate</a></code> and <code class="module"><a href="../mod/mod_ssl.html">mod_ssl</a></code> components, as
    well as every component starting with <code>apr_db*</code>.  These modules
    are built by invoking <code>nmake</code>, or the IDE directly with the
    <code>BinBuild</code> target, which builds those modules conditionally
    if the <code>srclib</code> directories <code>openssl</code> and/or
    <code>zlib</code> exist, and based on the setting of <code>DBD_LIST</code>
    and <code>DBM_LIST</code> environment variables.</p>

  

  <h3><a name="exportingmakfiles" id="exportingmakfiles">Exporting command-line .mak files</a></h3>

    

    <p>Exported <code>.mak</code> files pose a greater hassle, but they are
    required for Visual C++ 5.0 users to build <code class="module"><a href="../mod/mod_ssl.html">mod_ssl</a></code>,
    abs (<code class="program"><a href="../programs/ab.html">ab</a></code> with SSL support) and/or
    <code class="module"><a href="../mod/mod_deflate.html">mod_deflate</a></code>.  The .mak files also support a broader
    range of C++ tool chain distributions, such as Visual Studio Express.</p>

    <p>You must first build all projects in order to create all dynamic
    auto-generated targets, so that dependencies can be parsed correctly.
    Build the entire project from within the Visual Studio 6.0 (98) IDE,
    using the <code>BuildAll</code> target, then use the Project Menu Export
    for all makefiles (checking on "with dependencies".)  Run the following
    command to correct absolute paths into relative paths so they will build
    anywhere:</p>

    <div class="example"><p><code>
      perl srclib\apr\build\fixwin32mak.pl
    </code></p></div>

    <p>You must type this command from the <em>top level</em>
    directory of the httpd source tree. Every
    <code>.mak</code> and <code>.dep</code> project file within
    the current directory and below will be corrected, and the
    timestamps adjusted to reflect the <code>.dsp</code>.</p>

    <p>Always review the generated <code>.mak</code> and <code>.dep</code>
    files for Platform SDK or other local, machine specific file paths.
    The <code>DevStudio\Common\MSDev98\bin\</code> (VC6) directory contains
    a <code>sysincl.dat</code> file, which lists all exceptions.  Update
    this file (including both forward and backslashed paths, such as both
    <code>sys/time.h</code> and <code>sys\time.h</code>) to ignore such
    newer dependencies.  Including local-install paths in a distributed
    <code>.mak</code> file will cause the build to fail completely.</p>

    <p>If you contribute back a patch that revises project files, we
    must commit project files in Visual Studio 6.0 format. Changes
    should be simple, with minimal compilation and linkage flags that
    can be recognized by all Visual Studio environments.</p>

  

  <h3><a name="installation" id="installation">Installation</a></h3>

    

    <p>Once Apache has been compiled, it needs to be installed in
    its server root directory. The default is the
    <code>\Apache2</code> directory, of the same drive.</p>

    <p>To build and install all the files into the desired folder
    <em>dir</em> automatically, use one of the following
    <code>nmake</code> commands:</p>

    <div class="example"><p><code>
      nmake /f Makefile.win installr INSTDIR=<em>dir</em><br />
      nmake /f Makefile.win installd INSTDIR=<em>dir</em>
    </code></p></div>

    <p>The <em>dir</em> argument to <code>INSTDIR</code> provides
    the installation directory; it can be omitted if Apache is
    to be installed into <code>\Apache22</code> (of the current
    drive).</p>

  

  <h3><a name="projectcomponents-warn" id="projectcomponents-warn">Warning about building Apache from the development tree</a></h3>

    

    <div class="note">Note only the <code>.dsp</code> files are maintained between <code>release</code>
    builds. The <code>.mak</code> files are NOT regenerated, due to the tremendous
    waste of reviewer's time. Therefore, you cannot rely on the <code>NMAKE</code>
    commands above to build revised <code>.dsp</code> project files unless you
    then export all <code>.mak</code> files yourself from the project. This is
    unnecessary if you build from within the Microsoft
    Developer Studio environment.</div>

  
  </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="cmake" id="cmake">Building httpd with cmake</a></h2>
  

  <p>The primary documentation for this build mechanism is in the 
  <code>README.cmake</code> file in the source distribution.  Refer to that file
  for detailed instructions.</p>

  <p>Building httpd with cmake requires building APR and APR-util separately.
  Refer to their <code>README.cmake</code> files for instructions.</p>

  <p>The primary limitations of the cmake-based build are inherited from the APR-util
  project, and are listed below because of their impact on httpd:</p>

  <ul>
    <li>No cmake build for the APR-iconv subproject is available, and the
      APR-util cmake build cannot consume an existing APR-iconv build.  Thus,
      <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> and possibly some third-party modules 
      cannot be used.</li>
    <li>The cmake build for the APR-util subproject does not support most of the
      optional DBM and DBD libraries supported by the included Visual Studio
      project files.  This limits the database backends supported by a number of
      bundled and third-party modules.</li>
  </ul>

  </div></div>
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