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<h1><a href="../index.html">XSF</a> / How to build mesa</h1>
<span id="author">Cyril Brulebois</span><br />
<span id="email"><tt><<a href="mailto:kibi@debian.org">kibi@debian.org</a>></tt></span><br />
<div id="toc">
<div id="toctitle">Table of Contents</div>
<noscript><p><b>JavaScript must be enabled in your browser to display the table of contents.</b></p></noscript>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_foreword">Foreword</h2>
<div class="sectionbody">
<div class="paragraph"><p>Mesa is a special package since many flavours are built, which means
it takes quite some time to get all packages ready, as well as some
disc space (over 2GB for the <tt>build/</tt> directory alone).</p></div>
<div class="paragraph"><p>Also, trying to figure out whether latest <tt>master</tt> is also affected,
or backporting some bug fixes might lead to some painful I/O while
generating the <tt>.deb</tt> files, and then installing/unpacking them. This
is why this document was written: Helping users test other mesa
releases, branches, bug fixes without having to build full packages,
and without having to mess with their systems (<em>i.e.</em> no root access
is needed once the build dependencies are installed).</p></div>
<div class="paragraph"><p>We’ll focus on the DRI (Direct Rendering Infrastructure) flavour
(<tt>libgl1-mesa-dri</tt>), which is the most common.</p></div>
<div class="paragraph"><p>It might be possible to adapt the following steps to another flavour,
in which case the appropriate options to be passed to <tt>./configure</tt>
should be looked up in the <tt>debian/rules</tt> file of the Debian source
package.</p></div>
<div class="sidebarblock">
<div class="content">
<div class="paragraph"><div class="title">Note</div><p>Before reading further, be aware that <tt>nouveau</tt> is a bit special:</p></div>
<div class="ulist"><ul>
<li>
<p>
It’s considered experimental, and shipped in the
<tt>libgl1-mesa-dri-experimental</tt> package accordingly.
</p>
</li>
<li>
<p>
It may fail to build (both API and ABI are still changing).
</p>
</li>
<li>
<p>
We’re not shipping <tt>nouveau_vieux_dri.so</tt> yet (for cards from NV04
to NV2X; <tt>nouveau_dri.so</tt> is for NV30 and later). See the upstream
<a href="http://nouveau.freedesktop.org/wiki/FeatureMatrix">FeatureMatrix</a>
page to determine a card’s series.
</p>
</li>
</ul></div>
</div></div>
<div style="page-break-after:always"></div>
</div>
</div>
<div class="sect1">
<h2 id="_gathering_information">Gathering information</h2>
<div class="sectionbody">
<div class="paragraph"><p>Get started by installing <tt>mesa-utils</tt>, which contains <tt>glxinfo</tt>.</p></div>
<div class="ulist"><ul>
<li>
<p>
<em>Is direct rendering enabled?</em>
</p>
<div class="literalblock">
<div class="content">
<pre><tt>$ glxinfo | grep ^direct
direct rendering: Yes</tt></pre>
</div></div>
<div class="paragraph"><p>↪ Yes.</p></div>
</li>
<li>
<p>
<em>Is this the classic or <a href="http://en.wikipedia.org/wiki/Gallium3D">Gallium</a> driver?</em>
</p>
<div class="literalblock">
<div class="content">
<pre><tt>$ glxinfo | grep 'renderer string'
OpenGL renderer string: Mesa DRI Intel(R) 945GM GEM 20100330 DEVELOPMENT</tt></pre>
</div></div>
<div class="paragraph"><p>↪ No “Gallium” here, therefore: “classic”.</p></div>
</li>
<li>
<p>
<em>Which driver is this, and where is it located?</em>
</p>
<div class="literalblock">
<div class="content">
<pre><tt>$ LIBGL_DEBUG=verbose glxinfo 2>&1 >/dev/null | grep so$
libGL: OpenDriver: trying /usr/lib/dri/tls/i915_dri.so
libGL: OpenDriver: trying /usr/lib/dri/i915_dri.so</tt></pre>
</div></div>
<div class="paragraph"><p>↪ <tt>i915</tt>, from the system directory: <tt>/usr/lib/dri</tt> (likely installed through a Debian package).</p></div>
</li>
<li>
<p>
<em>How can I get more debugging information?</em>
</p>
<div class="literalblock">
<div class="content">
<pre><tt>export LIBGL_DEBUG=verbose
export MESA_DEBUG=1
export EGL_LOG_LEVEL=debug</tt></pre>
</div></div>
</li>
</ul></div>
<div style="page-break-after:always"></div>
</div>
</div>
<div class="sect1">
<h2 id="_preparing_mesa_sources">Preparing mesa sources</h2>
<div class="sectionbody">
<div class="paragraph"><p>To get started, installing all build dependencies of the <tt>mesa</tt> source
package should be sufficient, along with the essential build tools,
and <tt>git</tt>:</p></div>
<div class="listingblock">
<div class="content">
<pre><tt>$ sudo apt-get install build-essential git
$ sudo apt-get build-dep mesa</tt></pre>
</div></div>
<div class="paragraph"><p>If you’re on <tt>squeeze</tt> you may need to install a few more packages:
newer <tt>libdrm-dev</tt> (<strong>FIXME:</strong> talk about picking it from <tt>wheezy</tt>? or
about a local installation?), as well as <tt>libxmu-dev</tt>, <tt>libxi-dev</tt>.</p></div>
<div class="paragraph"><p>Make sure you have some disc space available, since the git repository
is over 120MB, and since the mesa directory is over 500MB after a
build. Once you’re ready, grab the upstream mesa sources:</p></div>
<div class="listingblock">
<div class="content">
<pre><tt>$ git clone git://anongit.freedesktop.org/mesa/mesa mesa.git
$ cd mesa.git
$ autoreconf -vfi</tt></pre>
</div></div>
<div class="paragraph"><p>Here’s what the <tt>./configure</tt> call will look like:</p></div>
<div class="listingblock">
<div class="content">
<pre><tt>$ ./configure --prefix=/usr \
--enable-driglx-direct \
--enable-gallium \
--enable-gles-overlay \
--enable-gles1 \
--enable-gles2 \
--enable-glx-tls \
--with-driver=dri \
--with-dri-driverdir=/usr/lib/dri \
--with-egl-platforms='drm x11' \
--with-state-trackers=egl,glx,dri,vega \
…</tt></pre>
</div></div>
<div class="paragraph"><p>Now, what are the parameters to replace “<tt>…</tt>” with? Basically, if
you determined an Intel driver (<tt>i915</tt> or <tt>i965</tt>), you want to use the
classic drivers and to disable the Gallium drivers. If you saw a
Radeon driver (<tt>r300</tt> or <tt>r600</tt>), you should prefer the Gallium
drivers. If you’re using <tt>nouveau</tt>, make sure you read the note in the
<em>Foreword</em>. The following assumes you’re using <tt>nouveau_dri.so</tt>.</p></div>
<div class="paragraph"><p>Examples for common drivers:</p></div>
<div class="ulist"><ul>
<li>
<p>
For <tt>i915</tt>, you need:
</p>
<div class="literalblock">
<div class="content">
<pre><tt>--with-dri-drivers=i915</tt></pre>
</div></div>
</li>
<li>
<p>
For <tt>i965</tt>, you need:
</p>
<div class="literalblock">
<div class="content">
<pre><tt>--with-dri-drivers=i965</tt></pre>
</div></div>
</li>
<li>
<p>
For <tt>nouveau</tt>, you may want to try:
</p>
<div class="literalblock">
<div class="content">
<pre><tt>--with-dri-drivers=nouveau --enable-gallium-nouveau</tt></pre>
</div></div>
</li>
<li>
<p>
For <tt>r300</tt> (the options are named <tt>radeon</tt>), you need:
</p>
<div class="literalblock">
<div class="content">
<pre><tt>--with-dri-drivers=radeon --enable-gallium-radeon</tt></pre>
</div></div>
</li>
<li>
<p>
For <tt>r600</tt>, you need:
</p>
<div class="literalblock">
<div class="content">
<pre><tt>--with-dri-drivers=r600 --enable-gallium-r600</tt></pre>
</div></div>
</li>
</ul></div>
<div class="paragraph"><p>Now, once you’ve run <tt>./configure</tt>, time for your favorite beverage:</p></div>
<div class="listingblock">
<div class="content">
<pre><tt>$ make</tt></pre>
</div></div>
<div style="page-break-after:always"></div>
</div>
</div>
<div class="sect1">
<h2 id="_running_the_newly_built_mesa_libraries">Running the newly-built mesa libraries</h2>
<div class="sectionbody">
<div class="paragraph"><p>Shared libraries end up in the <tt>lib/</tt> directory. It contains the
classic drivers, while Gallium drivers end up under <tt>lib/gallium</tt>. If
you’re not an Intel user, overwrite the classic drivers with the
Gallium ones:</p></div>
<div class="listingblock">
<div class="content">
<pre><tt>$ mv lib/gallium/* lib/</tt></pre>
</div></div>
<div class="paragraph"><p>Now, 3 variables need to be set, so that the locally-built libraries
are used.</p></div>
<div class="ulist"><ul>
<li>
<p>
To begin with, libGL itself and its drivers:
</p>
<div class="literalblock">
<div class="content">
<pre><tt>$ export LIBGL_DRIVERS_PATH=lib</tt></pre>
</div></div>
<div class="paragraph"><p><em>Did this work?</em></p></div>
<div class="literalblock">
<div class="content">
<pre><tt>$ LIBGL_DEBUG=verbose glxinfo 2>&1 >/dev/null | grep so$
libGL: OpenDriver: trying lib/tls/i915_dri.so
libGL: OpenDriver: trying lib/i915_dri.so</tt></pre>
</div></div>
<div class="paragraph"><p>↪ Yes: No system directory, paths are relative to <tt>lib/</tt>.</p></div>
</li>
<li>
<p>
Set <tt>LD_LIBRARY_PATH</tt> to make sure the locally-built libraries
(including those pulled through library dependencies) are used,
instead of system ones:
</p>
<div class="literalblock">
<div class="content">
<pre><tt>$ export LD_LIBRARY_PATH=lib</tt></pre>
</div></div>
<div class="paragraph"><p><em>Did this work?</em></p></div>
<div class="literalblock">
<div class="content">
<pre><tt>$ ldd lib/libGLESv2.so | grep glapi
libglapi.so.0 => lib/libglapi.so.0 (0x00007fee3192e000)</tt></pre>
</div></div>
<div class="paragraph"><p>↪ Yes: Path is relative to <tt>lib</tt>.</p></div>
</li>
<li>
<p>
Set the EGL search path:
</p>
<div class="literalblock">
<div class="content">
<pre><tt>$ export EGL_DRIVERS_PATH=lib/egl</tt></pre>
</div></div>
<div class="paragraph"><p><em>Did this work?</em></p></div>
<div class="paragraph"><p><strong>FIXME: We should be shipping EGL-aware applications through <tt>mesa-utils</tt>.</strong></p></div>
<div class="literalblock">
<div class="content">
<pre><tt>$ EGL_LOG_LEVEL=debug test_application 2>&1 >/dev/null | grep '\.so'
libEGL debug: added lib/egl/egl_gallium.so to module array
libEGL debug: dlopen(lib/egl/egl_gallium.so)
libEGL debug: DRI2: dlopen(lib/i915_dri.so)</tt></pre>
</div></div>
<div class="paragraph"><p>↪ Yes: No system directory, paths are relative to <tt>lib/</tt>.</p></div>
</li>
</ul></div>
<h3 id="_the_end" class="float">The end.</h3>
<div class="paragraph"><p>Now you should be ready to test upstream’s suggestions!</p></div>
</div>
</div>
</div>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
Last updated 2011-08-08 10:58:19 UTC
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