</p>
</li>
<li>
- <p>LLVM: version 2.9 recommended; 2.6 or later required.</p>
- <p><b>NOTE</b>: LLVM 2.8 and earlier will not work on systems that support the
- Intel AVX extensions (e.g. Sandybridge). LLVM's code generator will
- fail when trying to emit AVX instructions. This was fixed in LLVM 2.9.
- </p>
+ <p>LLVM: version 3.4 recommended; 3.3 or later required.</p>
<p>
For Linux, on a recent Debian based distribution do:
</p>
</pre>
<p>
- For Windows you will need to build LLVM from source with MSVC or MINGW
- (either natively or through cross compilers) and CMake, and set the LLVM
- environment variable to the directory you installed it to.
+ For Windows you will need to build LLVM from source with MSVC or MINGW
+ (either natively or through cross compilers) and CMake, and set the LLVM
+ environment variable to the directory you installed it to.
LLVM will be statically linked, so when building on MSVC it needs to be
built with a matching CRT as Mesa, and you'll need to pass
- -DLLVM_USE_CRT_RELEASE=MTd for debug and checked builds,
- -DLLVM_USE_CRT_RELEASE=MTd for profile and release builds.
+ <code>-DLLVM_USE_CRT_xxx=yyy</code> as described below.
+ </p>
+
+ <table border="1">
+ <tr>
+ <th rowspan="2">LLVM build-type</th>
+ <th colspan="2" align="center">Mesa build-type</th>
+ </tr>
+ <tr>
+ <th>debug,checked</th>
+ <th>release,profile</th>
+ </tr>
+ <tr>
+ <th>Debug</th>
+ <td><code>-DLLVM_USE_CRT_DEBUG=MTd</code></td>
+ <td><code>-DLLVM_USE_CRT_DEBUG=MT</code></td>
+ </tr>
+ <tr>
+ <th>Release</th>
+ <td><code>-DLLVM_USE_CRT_RELEASE=MTd</code></td>
+ <td><code>-DLLVM_USE_CRT_RELEASE=MT</code></td>
+ </tr>
+ </table>
+ <p>
You can build only the x86 target by passing -DLLVM_TARGETS_TO_BUILD=X86
to cmake.
</p>
For Windows the procedure is similar except the target:
<pre>
- scons build=debug libgl-gdi
+ scons platform=windows build=debug libgl-gdi
</pre>
<h1>Using</h1>
-On Linux, building will create a drop-in alternative for libGL.so into
+<h2>Linux</h2>
+
+<p>On Linux, building will create a drop-in alternative for libGL.so into</p>
<pre>
build/foo/gallium/targets/libgl-xlib/libGL.so
lib/gallium/libGL.so
</pre>
-To use it set the LD_LIBRARY_PATH environment variable accordingly.
+<p>To use it set the LD_LIBRARY_PATH environment variable accordingly.</p>
-For performance evaluation pass debug=no to scons, and use the corresponding
-lib directory without the "-debug" suffix.
+<p>For performance evaluation pass build=release to scons, and use the corresponding
+lib directory without the "-debug" suffix.</p>
-On Windows, building will create a drop-in alternative for opengl32.dll. To use
-it put it in the same directory as the application. It can also be used by
+
+<h2>Windows</h2>
+
+<p>
+On Windows, building will create
+<code>build/windows-x86-debug/gallium/targets/libgl-gdi/opengl32.dll</code>
+which is a drop-in alternative for system's <code>opengl32.dll</code>. To use
+it put it in the same directory as your application. It can also be used by
replacing the native ICD driver, but it's quite an advanced usage, so if you
need to ask, don't even try it.
+</p>
+
+<p>
+There is however an easy way to replace the OpenGL software renderer that comes
+with Microsoft Windows 7 (or later) with llvmpipe (that is, on systems without
+any OpenGL drivers):
+</p>
+
+<ul>
+ <li><p>copy build/windows-x86-debug/gallium/targets/libgl-gdi/opengl32.dll to C:\Windows\SysWOW64\mesadrv.dll</p></li>
+ <li><p>load this registry settings:</p>
+ <pre>REGEDIT4
+
+; http://technet.microsoft.com/en-us/library/cc749368.aspx
+; http://www.msfn.org/board/topic/143241-portable-windows-7-build-from-winpe-30/page-5#entry942596
+[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\OpenGLDrivers\MSOGL]
+"DLL"="mesadrv.dll"
+"DriverVersion"=dword:00000001
+"Flags"=dword:00000001
+"Version"=dword:00000002
+</pre>
+ </li>
+ <li>Ditto for 64 bits drivers if you need them.</li>
+</ul>
<h1>Profiling</h1>
projects / mesa.git / blobdiff