290 lines
10 KiB
HTML
290 lines
10 KiB
HTML
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<html>
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<title>Compilation and Installation using Autoconf</title>
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<link rel="stylesheet" type="text/css" href="mesa.css"></head>
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<body>
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<h1>Compilation and Installation using Autoconf</h1>
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<ol>
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<li><a href="#basic">Basic Usage</a></li>
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<li><a href="#driver">Driver Options</a></li>
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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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<li><a href="#library">Library Options</a></li>
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<ul>
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<li><a href="#glu">GLU</a></li>
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<li><a href="#glw">GLw</a></li>
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<li><a href="#glut">GLUT</a></li>
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</ul>
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<li><a href="#demos">Demo Program Options</a></li>
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</ol>
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<a name="basic">
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<h2>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 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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<ul>
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<li><code>--prefix=PREFIX</code> - 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>.
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</li>
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<li><code>--exec-prefix=EPREFIX</code> - 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>${prefix}</code>.
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</li>
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<li><code>--libdir=LIBDIR</code> - This option specifies the directory
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where the GL libraries will be installed. The default is
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<code>${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.
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</li>
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<li><code>--enable-static, --disable-shared</code> - 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.
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</li>
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<li><code>CC, CFLAGS, CXX, CXXFLAGS</code> - 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 with the options
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<code>"-g -O2"</code>.
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</li>
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<li><code>LDFLAGS</code> - An environment variable specifying flags to
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pass when linking programs. These are normally empty, but can be used
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to direct the linker to use libraries in nonstandard directories. For
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example, <code>LDFLAGS="-L/usr/X11R6/lib"</code>.
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</li>
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<li><code>PKG_CONFIG_PATH</code> - When available, the
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<code>pkg-config</code> utility 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.
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</li>
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</ul>
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</p>
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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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<ul>
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<li><code>--with-x</code> - When the X11 development libraries are
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needed, the <code>pkg-config</code> utility <a href="#pkg-config">will
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be used</a> for locating them. If they cannot be found through
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<code>pkg-config</code> a fallback routing using <code>imake</code> will
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be used. In this case, the <code>--with-x</code>,
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<code>--x-includes</code> and <code>--x-libraries</code> options can
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control the use of X for Mesa.
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</li>
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<li><code>--enable-gl-osmesa</code> - The <a href="osmesa.html">OSMesa
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library</a> can be built on top of libGL for drivers that provide it.
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This option controls whether to build libOSMesa. By default, this is
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enabled for the Xlib driver and disabled otherwise. Note that this
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option is different than using OSMesa as the driver.
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</li>
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<li><code>--enable-debug</code> - This option will enable compiler
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options and macros to aid in debugging the Mesa libraries.
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</li>
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<li><code>--disable-asm</code> - 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.
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</li>
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<li><code>--enable-32-bit, --enable-64-bit</code> - By default, the
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build will compile code as directed by the environment variables
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<code>CC</code>, <code>CFLAGS</code>, etc. If the compiler is
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<code>gcc</code>, these options offer a helper to add the compiler flags
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to force 32- or 64-bit code generation as used on the x86 and x86_64
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architectures.
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</li>
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</ul>
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</p>
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<a name="driver">
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<h2>2. 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 option --with-driver. There are currently three supported
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options in the configure script.
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</p>
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<ul>
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<a name="xlib">
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<li><b><em>Xlib</em></b> - This is the default mode for building Mesa.
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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>--with-driver=xlib</code>. The libX11 and libXext
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libraries, as well as the X11 development headers, will be need to
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support the Xlib driver.
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</li>
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<a name="dri">
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<li><b><em>DRI</em></b> - This mode uses the DRI hardware drivers for
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accelerated OpenGL rendering. Enable the DRI drivers with the option
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<code>--with-driver=dri</code>. See the <a href="install.html">basic
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installation instructions</a> for details on prerequisites for the DRI
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drivers.
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</li>
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<!-- DRI specific options -->
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<p>
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<ul>
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<li><code>--with-dri-driverdir=DIR</code> - 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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</li>
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<li><code>--with-dri-drivers=DRIVER,DRIVER,...</code> - 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.</li>
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<!-- This explanation might be totally bogus. Kristian? -->
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<li><code>--disable-driglx-direct</code> - 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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</li>
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<li><code>--enable-glx-tls</code> - Enable Thread Local Storage (TLS) in
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GLX.
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</li>
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<li><code>--with-expat=DIR</code> - The DRI-enabled libGL uses expat to
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parse the DRI configuration files in <code>/etc/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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</li>
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</ul>
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</p>
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<a name="osmesa">
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<li><b><em>OSMesa</em></b> - 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.
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</li>
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<!-- OSMesa specific options -->
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<p>
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<ul>
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<li><code>--with-osmesa-bits=BITS</code> - 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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</li>
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</ul>
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</p>
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</ul>
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<a name="library">
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<h2>3. Library Options</h2>
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<p>
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The configure script provides more fine grained control over the GL
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libraries that will be built. More details on the specific GL libraries
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can be found in the <a href="install.html">basic installation
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instructions</a>.
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<ul>
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<a name="glu">
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<li><b><em>GLU</em></b> - The libGLU library will be built by default
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on all drivers. This can be disable with the option
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<code>--disable-glu</code>.
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</li>
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<a name="glw">
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<li><b><em>GLw</em></b> - The libGLw library will be built by default
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if libGLU has been enabled. This can be disable with the option
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<code>--disable-glw</code>.
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</li>
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<a name="glut">
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<li><b><em>GLUT</em></b> - The libglut library will be built by default
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if libGLU has been enabled and the glut source code from the MesaGLUT
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tarball is available. This can be disable with the option
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<code>--disable-glut</code>.
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</li>
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</ul>
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</p>
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<a name="demos">
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<h2>4. Demo Program Options</h2>
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<p>
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There are many demonstration programs in the MesaDemos tarball. If the
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programs are available when <code>./configure</code> is run, a subset of
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the programs will be built depending on the driver and library options
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chosen. See the directory <code>progs</code> for the full set of demos.
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<ul>
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<li><code>--with-demos=DEMOS,DEMOS,...</code> - This option allows a
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specific set of demo programs to be built. For example,
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<code>--with-demos="xdemos,slang"</code>. Beware that if this option is
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used, it will not be ensured that the necessary GL libraries will be
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available.
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</li>
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<li><code>--without-demos</code> - This completely disables building the
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demo programs. It is equivalent to <code>--with-demos=no</code>.
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</li>
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</ul>
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</p>
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</body>
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</html>
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