2015-11-21 19:36:47 -07:00
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<head>
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<meta http-equiv="content-type" content="text/html; charset=utf-8">
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<title>Compilation and Installation using Autoconf</title>
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<link rel="stylesheet" type="text/css" href="mesa.css">
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</head>
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<body>
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<div class="header">
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<h1>The Mesa 3D Graphics Library</h1>
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</div>
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<iframe src="contents.html"></iframe>
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<div class="content">
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<h1>Compilation and Installation using Autoconf</h1>
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<ol>
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<li><p><a href="#basic">Basic Usage</a></li>
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<li><p><a href="#driver">Driver Options</a>
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<ul>
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<li><a href="#xlib">Xlib Driver Options</a></li>
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<li><a href="#dri">DRI Driver Options</a></li>
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<li><a href="#osmesa">OSMesa Driver Options</a></li>
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</ul>
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</ol>
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<h2 id="basic">1. Basic Usage</h2>
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<p>
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The autoconf generated configure script can be used to guess your
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platform and change various options for building Mesa. To use the
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configure script, type:
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</p>
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<pre>
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./configure
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</pre>
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<p>
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To see a short description of all the options, type <code>./configure
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--help</code>. If you are using a development snapshot and the configure
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script does not exist, type <code>./autogen.sh</code> to generate it
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first. If you know the options you want to pass to
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<code>configure</code>, you can pass them to <code>autogen.sh</code>. It
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will run <code>configure</code> with these options after it is
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generated. Once you have run <code>configure</code> and set the options
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to your preference, type:
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</p>
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<pre>
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make
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</pre>
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<p>
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This will produce libGL.so and/or several other libraries depending on the
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options you have chosen. Later, if you want to rebuild for a different
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configuration run <code>make realclean</code> before rebuilding.
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</p>
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<p>
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Some of the generic autoconf options are used with Mesa:
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</p>
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<dl>
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<dt><code>--prefix=PREFIX</code></dt>
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<dd><p>This is the root directory where
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files will be installed by <code>make install</code>. The default is
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<code>/usr/local</code>.</p>
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</dd>
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<dt><code>--exec-prefix=EPREFIX</code></dt>
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<dd><p>This is the root directory
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where architecture-dependent files will be installed. In Mesa, this is
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only used to derive the directory for the libraries. The default is
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<code>${prefix}</code>.</p>
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</dd>
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<dt><code>--libdir=LIBDIR</code></dt>
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<dd><p>This option specifies the directory
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where the GL libraries will be installed. The default is
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<code>${exec_prefix}/lib</code>. It also serves as the name of the
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library staging area in the source tree. For instance, if the option
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<code>--libdir=/usr/local/lib64</code> is used, the libraries will be
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created in a <code>lib64</code> directory at the top of the Mesa source
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tree.</p>
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</dd>
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2016-05-29 04:11:54 -06:00
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<dt><code>--sysconfdir=DIR</code></dt>
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<dd><p>This option specifies the directory where the configuration
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files will be installed. The default is <code>${prefix}/etc</code>.
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Currently there's only one config file provided when dri drivers are
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enabled - it's <code>drirc</code>.</p>
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</dd>
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<dt><code>--enable-static, --disable-shared</code></dt>
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<dd><p>By default, Mesa
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will build shared libraries. Either of these options will force static
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libraries to be built. It is not currently possible to build static and
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shared libraries in a single pass.</p>
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</dd>
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<dt><code>CC, CFLAGS, CXX, CXXFLAGS</code></dt>
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<dd><p>These environment variables
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control the C and C++ compilers used during the build. By default,
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<code>gcc</code> and <code>g++</code> are used and the debug/optimisation
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level is left unchanged.</p>
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</dd>
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<dt><code>LDFLAGS</code></dt>
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<dd><p>An environment variable specifying flags to
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pass when linking programs. These should be empty and
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<code>PKG_CONFIG_PATH</code> is recommended to be used instead. If needed
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it can be used to direct the linker to use libraries in nonstandard
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directories. For example, <code>LDFLAGS="-L/usr/X11R6/lib"</code>.</p>
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</dd>
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<dt><code>PKG_CONFIG_PATH</code></dt>
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<dd><p>The
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<code>pkg-config</code> utility is a hard requirement for configuring and
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building mesa. It is used to search for external libraries
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on the system. This environment variable is used to control the search
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path for <code>pkg-config</code>. For instance, setting
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<code>PKG_CONFIG_PATH=/usr/X11R6/lib/pkgconfig</code> will search for
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package metadata in <code>/usr/X11R6</code> before the standard
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directories.</p>
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</dd>
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</dl>
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<p>
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There are also a few general options for altering the Mesa build:
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</p>
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<dl>
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<dt><code>--enable-debug</code></dt>
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<dd><p>This option will set the compiler debug/optimisation levels (if the user
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hasn't already set them via the CFLAGS/CXXFLAGS) and macros to aid in
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debugging the Mesa libraries.</p>
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<p>Note that enabling this option can lead to noticeable loss of performance.</p>
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<dt><code>--disable-asm</code></dt>
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<dd><p>There are assembly routines
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available for a few architectures. These will be used by default if
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one of these architectures is detected. This option ensures that
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assembly will not be used.</p>
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</dd>
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<dt><code>--build=</code></dt>
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<dt><code>--host=</code></dt>
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<dd><p>By default, the build will compile code for the architecture that
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it's running on. In order to build cross-compile Mesa on a x86-64 machine
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that is to run on a i686, one would need to set the options to:</p>
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<p><code>--build=x86_64-pc-linux-gnu --host=i686-pc-linux-gnu</code></p>
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Note that these can vary from distribution to distribution. For more
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information check with the
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<a href="https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.69/html_node/Specifying-Target-Triplets.html">
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autoconf manual</a>.
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Note that you will need to correctly set <code>PKG_CONFIG_PATH</code> as well.
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<p>In some cases a single compiler is capable of handling both architectures
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(multilib) in that case one would need to set the <code>CC,CXX</code> variables
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appending the correct machine options. Seek your compiler documentation for
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further information -
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<a href="https://gcc.gnu.org/onlinedocs/gcc/Submodel-Options.html"> gcc
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machine dependent options</a></p>
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<p>In addition to specifying correct <code>PKG_CONFIG_PATH</code> for the target
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architecture, the following should be sufficient to configure multilib Mesa</p>
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<code>./configure CC="gcc -m32" CXX="g++ -m32" --build=x86_64-pc-linux-gnu --host=i686-pc-linux-gnu ...</code>
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</dd>
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</dl>
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2018-10-23 00:35:32 -06:00
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<h2 id="driver">2. GL Driver Options</h2>
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<p>
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There are several different driver modes that Mesa can use. These are
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described in more detail in the <a href="install.html">basic
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installation instructions</a>. The Mesa driver is controlled through the
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configure options <code>--enable-glx</code> and <code>--enable-osmesa</code>
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</p>
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<h3 id="xlib">Xlib</h3><p>
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It uses Xlib as a software renderer to do all rendering. It corresponds
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to the option <code>--enable-glx=xlib</code> or <code>--enable-glx=gallium-xlib</code>.
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<h3 id="dri">DRI</h3><p>This mode uses the DRI hardware drivers for
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accelerated OpenGL rendering. To enable use <code>--enable-glx=dri
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--enable-dri</code>.
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<!-- DRI specific options -->
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<dl>
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<dt><code>--with-dri-driverdir=DIR</code>
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<dd><p> This option specifies the
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location the DRI drivers will be installed to and the location libGL
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will search for DRI drivers. The default is <code>${libdir}/dri</code>.
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<dt><code>--with-dri-drivers=DRIVER,DRIVER,...</code>
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<dd><p> This option
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allows a specific set of DRI drivers to be built. For example,
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<code>--with-dri-drivers="swrast,i965,radeon,nouveau"</code>. By
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default, the drivers will be chosen depending on the target platform.
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See the directory <code>src/mesa/drivers/dri</code> in the source tree
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for available drivers. Beware that the swrast DRI driver is used by both
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libGL and the X.Org xserver GLX module to do software rendering, so you
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may run into problems if it is not available.
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<!-- This explanation might be totally bogus. Kristian? -->
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<dt><code>--disable-driglx-direct</code>
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<dd><p> Disable direct rendering in
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GLX. Normally, direct hardware rendering through the DRI drivers and
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indirect software rendering are enabled in GLX. This option disables
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direct rendering entirely. It can be useful on architectures where
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kernel DRM modules are not available.
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<dt><code>--enable-glx-tls</code> <dd><p>
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Enable Thread Local Storage (TLS) in
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GLX.
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<dt><code>--with-expat=DIR</code>
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<dd><p><strong>DEPRECATED</strong>, use <code>PKG_CONFIG_PATH</code> instead.</p>
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<p>The DRI-enabled libGL uses expat to
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parse the DRI configuration files in <code>${sysconfdir}/drirc</code> and
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<code>~/.drirc</code>. This option allows a specific expat installation
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to be used. For example, <code>--with-expat=/usr/local</code> will
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search for expat headers and libraries in <code>/usr/local/include</code>
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and <code>/usr/local/lib</code>, respectively.
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</dl>
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<h3 id="osmesa">OSMesa </h3><p> No libGL is built in this
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mode. Instead, the driver code is built into the Off-Screen Mesa
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(OSMesa) library. See the <a href="osmesa.html">Off-Screen Rendering</a>
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page for more details. It corresponds to the option
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<code>--enable-osmesa</code>.
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<!-- OSMesa specific options -->
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<dl>
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<dt><code>--with-osmesa-bits=BITS</code>
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<dd><p> This option allows the size
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of the color channel in bits to be specified. By default, an 8-bit
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channel will be used, and the driver will be named libOSMesa. Other
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options are 16- and 32-bit color channels, which will add the bit size
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to the library name. For example, <code>--with-osmesa-bits=16</code>
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will create the libOSMesa16 library with a 16-bit color channel.
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</dl>
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<h2 id="library">3. Library Options</h2>
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<p>
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The configure script provides more fine grained control over the libraries
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that will be built.
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</div>
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</body>
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</html>
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