<dt><b>CMAKE_BUILD_TYPE</b>:STRING</dt>
<dd>Sets the build type for <i>make</i> based generators. Possible
- values are Release, Debug, RelWithDebInfo and MiniSizeRel. On
+ values are Release, Debug, RelWithDebInfo and MinSizeRel. On
systems like Visual Studio the user sets the build type with the IDE
settings.</dd>
<i>-DLLVM_TARGETS_TO_BUILD="X86;PowerPC;Alpha"</i>.</dd>
<dt><b>LLVM_BUILD_TOOLS</b>:BOOL</dt>
- <dd>Build LLVM tools. Defaults to ON.</dd>
+ <dd>Build LLVM tools. Defaults to ON. Targets for building each tool
+ are generated in any case. You can build an tool separately by
+ invoking its target. For example, you can build <i>llvm-as</i>
+ with a makefile-based system executing <i>make llvm-as</i> on the
+ root of your build directory.</dd>
+
+ <dt><b>LLVM_INCLUDE_TOOLS</b>:BOOL</dt>
+ <dd>Generate build targets for the LLVM tools. Defaults to
+ ON. You can use that option for disabling the generation of build
+ targets for the LLVM tools.</dd>
<dt><b>LLVM_BUILD_EXAMPLES</b>:BOOL</dt>
- <dd>Build LLVM examples. Defaults to ON.</dd>
+ <dd>Build LLVM examples. Defaults to OFF. Targets for building each
+ example are generated in any case. See documentation
+ for <i>LLVM_BUILD_TOOLS</i> above for more details.</dd>
+
+ <dt><b>LLVM_INCLUDE_EXAMPLES</b>:BOOL</dt>
+ <dd>Generate build targets for the LLVM examples. Defaults to
+ ON. You can use that option for disabling the generation of build
+ targets for the LLVM examples.</dd>
<dt><b>LLVM_ENABLE_THREADS</b>:BOOL</dt>
<dd>Build with threads support, if available. Defaults to ON.</dd>
<dt><b>LLVM_ENABLE_ASSERTIONS</b>:BOOL</dt>
- <dd>Enables code assertions. Defaults to ON if and only if
+ <dd>Enables code assertions. Defaults to OFF if and only if
CMAKE_BUILD_TYPE is <i>Release</i>.</dd>
<dt><b>LLVM_ENABLE_PIC</b>:BOOL</dt>
- <dd>Add the <i>-fPIC</i> flag to the compiler command-line, if the
- compiler supports this flag. Some systems, like Windows, does not
- need this flag. Defaults to OFF.</dd>
+ <dd>Add the <i>-fPIC</i> flag for the compiler command-line, if the
+ compiler supports this flag. Some systems, like Windows, do not
+ need this flag. Defaults to ON.</dd>
+
+ <dt><b>LLVM_ENABLE_WARNINGS</b>:BOOL</dt>
+ <dd>Enable all compiler warnings. Defaults to ON.</dd>
+
+ <dt><b>LLVM_ENABLE_PEDANTIC</b>:BOOL</dt>
+ <dd>Enable pedantic mode. This disable compiler specific extensions, is
+ possible. Defaults to ON.</dd>
+
+ <dt><b>LLVM_ENABLE_WERROR</b>:BOOL</dt>
+ <dd>Stop and fail build, if a compiler warning is
+ triggered. Defaults to OFF.</dd>
<dt><b>LLVM_BUILD_32_BITS</b>:BOOL</dt>
<dd>Build 32-bits executables and libraries on 64-bits systems. This
- option is available only on some 64-bits unix systems. Defaults to
- OFF.</dd>
+ option is available only on some 64-bits unix systems. Defaults to
+ OFF.</dd>
+
+ <dt><b>LLVM_TARGET_ARCH</b>:STRING</dt>
+ <dd>LLVM target to use for native code generation. This is required
+ for JIT generation. It defaults to "host", meaning that it shall
+ pick the architecture of the machine where LLVM is being built. If
+ you are cross-compiling, set it to the target architecture
+ name.</dd>
<dt><b>LLVM_TABLEGEN</b>:STRING</dt>
<dd>Full path to a native TableGen executable (usually
<div class="doc_text">
-<p>LLVM testing is not supported on Visual Studio.</p>
+<p>Testing is performed when the <i>check</i> target is built. For
+ instance, if you are using makefiles, execute this command while on
+ the top level of your build directory:</p>
-<p>TODO</p>
+<div class="doc_code">
+ <p><tt>make check</tt></p>
+</div>
+
+<p>Testing is not supported on Visual Studio.</p>
</div>
<a href="http://www.vtk.org/Wiki/CMake_Cross_Compiling#Information_how_to_set_up_various_cross_compiling_toolchains">this
section</a> for a quick solution.</p>
+<p>Also see the <a href="#llvmvars">LLVM-specific variables</a>
+ section for variables used when cross-compiling.</p>
+
</div>
<!-- *********************************************************************** -->
<div class="doc_text">
-<p>TODO</p>
+ <p>The most difficult part of adding LLVM to the build of a project
+ is to determine the set of LLVM libraries corresponding to the set
+ of required LLVM features. What follows is an example of how to
+ obtain this information:</p>
+
+ <div class="doc_code">
+ <pre>
+ <b># A convenience variable:</b>
+ set(LLVM_ROOT "" CACHE PATH "Root of LLVM install.")
+ <b># A bit of a sanity check:</b>
+ if( NOT EXISTS ${LLVM_ROOT}/include/llvm )
+ message(FATAL_ERROR "LLVM_ROOT (${LLVM_ROOT}) is not a valid LLVM install")
+ endif()
+ <b># We incorporate the CMake features provided by LLVM:</b>
+ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${LLVM_ROOT}/share/llvm/cmake")
+ include(LLVM)
+ <b># Now set the header and library paths:</b>
+ include_directories( ${LLVM_ROOT}/include )
+ link_directories( ${LLVM_ROOT}/lib )
+ <b># Let's suppose we want to build a JIT compiler with support for
+ # binary code (no interpreter):</b>
+ llvm_map_components_to_libraries(REQ_LLVM_LIBRARIES jit native)
+ <b># Finally, we link the LLVM libraries to our executable:</b>
+ target_link_libraries(mycompiler ${REQ_LLVM_LIBRARIES})
+ </pre>
+ </div>
+
+ <p>This assumes that LLVM_ROOT points to an install of LLVM. The
+ procedure works too for uninstalled builds although we need to take
+ care to add an <i>include_directories</i> for the location of the
+ headers on the LLVM source directory (if we are building
+ out-of-source.)</p>
</div>
<a href="mailto:ofv@wanadoo.es">Oscar Fuentes</a><br>
<a href="http://llvm.org">LLVM Compiler Infrastructure</a><br>
- Last modified: $Date: 2008-12-31 03:59:36 +0100 (Wed, 31 Dec 2008) $
+ Last modified: $Date: 2010-08-09 03:59:36 +0100 (Mon, 9 Aug 2010) $
</address>
</body>
projects / oota-llvm.git / blobdiff