-.. _building-with-cmake:
-
========================
Building LLVM with CMake
========================
#. Create a directory for containing the build. It is not supported to build
LLVM on the source directory. cd to this directory:
- .. code-block:: bash
+ .. code-block:: console
$ mkdir mybuilddir
$ cd mybuilddir
#. Execute this command on the shell replacing `path/to/llvm/source/root` with
the path to the root of your LLVM source tree:
- .. code-block:: bash
+ .. code-block:: console
$ cmake path/to/llvm/source/root
explicitly specify the generator with the command line option ``-G "Name of the
generator"``. For knowing the available generators on your platform, execute
-.. code-block:: bash
+.. code-block:: console
$ cmake --help
This will list the generator's names at the end of the help text. Generator's
names are case-sensitive. Example:
-.. code-block:: bash
+.. code-block:: console
- $ cmake -G "Visual Studio 9 2008" path/to/llvm/source/root
+ $ cmake -G "Visual Studio 11" path/to/llvm/source/root
For a given development platform there can be more than one adequate
generator. If you use Visual Studio "NMake Makefiles" is a generator you can use
variables, with possible values ON/OFF. Options and variables are defined on the
CMake command line like this:
-.. code-block:: bash
+.. code-block:: console
$ cmake -DVARIABLE=value path/to/llvm/source
You can set a variable after the initial CMake invocation for changing its
value. You can also undefine a variable:
-.. code-block:: bash
+.. code-block:: console
$ cmake -UVARIABLE path/to/llvm/source
Variables are listed here appending its type after a colon. It is correct to
write the variable and the type on the CMake command line:
-.. code-block:: bash
+.. code-block:: console
$ cmake -DVARIABLE:TYPE=value path/to/llvm/source
Frequently-used CMake variables
-------------------------------
-Here are listed some of the CMake variables that are used often, along with a
+Here are some of the CMake variables that are used often, along with a
brief explanation and LLVM-specific notes. For full documentation, check the
CMake docs or execute ``cmake --help-variable VARIABLE_NAME``.
Extra flags to use when compiling C++ source files.
**BUILD_SHARED_LIBS**:BOOL
- Flag indicating is shared libraries will be built. Its default value is
- OFF. Shared libraries are not supported on Windows and not recommended in the
+ Flag indicating if shared libraries will be built. Its default value is
+ OFF. Shared libraries are not supported on Windows and not recommended on the
other OSes.
.. _LLVM-specific variables:
**LLVM_TARGETS_TO_BUILD**:STRING
Semicolon-separated list of targets to build, or *all* for building all
- targets. Case-sensitive. For Visual C++ defaults to *X86*. On the other cases
- defaults to *all*. Example: ``-DLLVM_TARGETS_TO_BUILD="X86;PowerPC"``.
+ targets. Case-sensitive. Defaults to *all*. Example:
+ ``-DLLVM_TARGETS_TO_BUILD="X86;PowerPC"``.
**LLVM_BUILD_TOOLS**:BOOL
Build LLVM tools. Defaults to ON. Targets for building each tool are generated
tests.
**LLVM_APPEND_VC_REV**:BOOL
- Append version control revision info (svn revision number or git revision id)
+ Append version control revision info (svn revision number or Git revision id)
to LLVM version string (stored in the PACKAGE_VERSION macro). For this to work
cmake must be invoked before the build. Defaults to OFF.
**LLVM_ENABLE_THREADS**:BOOL
Build with threads support, if available. Defaults to ON.
+**LLVM_ENABLE_CXX1Y**:BOOL
+ Build in C++1y mode, if available. Defaults to OFF.
+
**LLVM_ENABLE_ASSERTIONS**:BOOL
Enables code assertions. Defaults to OFF if and only if ``CMAKE_BUILD_TYPE``
is *Release*.
**LLVM_EXTERNAL_{CLANG,LLD,POLLY}_SOURCE_DIR**:PATH
Path to ``{Clang,lld,Polly}``\'s source directory. Defaults to
``tools/{clang,lld,polly}``. ``{Clang,lld,Polly}`` will not be built when it
- is empty or it does not point valid path.
+ is empty or it does not point to a valid path.
**LLVM_USE_OPROFILE**:BOOL
Enable building OProfile JIT support. Defaults to OFF
**LLVM_USE_INTEL_JITEVENTS**:BOOL
Enable building support for Intel JIT Events API. Defaults to OFF
+**LLVM_ENABLE_ZLIB**:BOOL
+ Build with zlib to support compression/uncompression in LLVM tools.
+ Defaults to ON.
+
+**LLVM_USE_SANITIZER**:STRING
+ Define the sanitizer used to build LLVM binaries and tests. Possible values
+ are ``Address``, ``Memory`` and ``MemoryWithOrigins``. Defaults to empty
+ string.
+
+**LLVM_BUILD_DOCS**:BOOL
+ Enables all enabled documentation targets (i.e. Doxgyen and Sphinx targets) to
+ be built as part of the normal build. If the ``install`` target is run then
+ this also enables all built documentation targets to be installed. Defaults to
+ OFF.
+
+**LLVM_ENABLE_DOXYGEN**:BOOL
+ Enables the generation of browsable HTML documentation using doxygen.
+ Defaults to OFF.
+
+**LLVM_ENABLE_DOXYGEN_QT_HELP**:BOOL
+ Enables the generation of a Qt Compressed Help file. Defaults to OFF.
+ This affects the make target ``doxygen-llvm``. When enabled, apart from
+ the normal HTML output generated by doxygen, this will produce a QCH file
+ named ``org.llvm.qch``. You can then load this file into Qt Creator.
+ This option is only useful in combination with ``-DLLVM_ENABLE_DOXYGEN=ON``;
+ otherwise this has no effect.
+
+**LLVM_DOXYGEN_QCH_FILENAME**:STRING
+ The filename of the Qt Compressed Help file that will be genrated when
+ ``-DLLVM_ENABLE_DOXYGEN=ON`` and
+ ``-DLLVM_ENABLE_DOXYGEN_QT_HELP=ON`` are given. Defaults to
+ ``org.llvm.qch``.
+ This option is only useful in combination with
+ ``-DLLVM_ENABLE_DOXYGEN_QT_HELP=ON``;
+ otherwise this has no effect.
+
+**LLVM_DOXYGEN_QHP_NAMESPACE**:STRING
+ Namespace under which the intermediate Qt Help Project file lives. See `Qt
+ Help Project`_
+ for more information. Defaults to "org.llvm". This option is only useful in
+ combination with ``-DLLVM_ENABLE_DOXYGEN_QT_HELP=ON``; otherwise
+ this has no effect.
+
+**LLVM_DOXYGEN_QHP_CUST_FILTER_NAME**:STRING
+ See `Qt Help Project`_ for
+ more information. Defaults to the CMake variable ``${PACKAGE_STRING}`` which
+ is a combination of the package name and version string. This filter can then
+ be used in Qt Creator to select only documentation from LLVM when browsing
+ through all the help files that you might have loaded. This option is only
+ useful in combination with ``-DLLVM_ENABLE_DOXYGEN_QT_HELP=ON``;
+ otherwise this has no effect.
+
+.. _Qt Help Project: http://qt-project.org/doc/qt-4.8/qthelpproject.html#custom-filters
+
+**LLVM_DOXYGEN_QHELPGENERATOR_PATH**:STRING
+ The path to the ``qhelpgenerator`` executable. Defaults to whatever CMake's
+ ``find_program()`` can find. This option is only useful in combination with
+ ``-DLLVM_ENABLE_DOXYGEN_QT_HELP=ON``; otherwise this has no
+ effect.
+
+**LLVM_ENABLE_SPHINX**:BOOL
+ If enabled CMake will search for the ``sphinx-build`` executable and will make
+ the ``SPHINX_OUTPUT_HTML`` and ``SPHINX_OUTPUT_MAN`` CMake options available.
+ Defaults to OFF.
+
+**SPHINX_EXECUTABLE**:STRING
+ The path to the ``sphinx-build`` executable detected by CMake.
+
+**SPHINX_OUTPUT_HTML**:BOOL
+ If enabled (and ``LLVM_ENABLE_SPHINX`` is enabled) then the targets for
+ building the documentation as html are added (but not built by default unless
+ ``LLVM_BUILD_DOCS`` is enabled). There is a target for each project in the
+ source tree that uses sphinx (e.g. ``docs-llvm-html``, ``docs-clang-html``
+ and ``docs-lld-html``). Defaults to ON.
+
+**SPHINX_OUTPUT_MAN**:BOOL
+ If enabled (and ``LLVM_ENABLE_SPHINX`` is enabled) the targets for building
+ the man pages are added (but not built by default unless ``LLVM_BUILD_DOCS``
+ is enabled). Currently the only target added is ``docs-llvm-man``. Defaults
+ to ON.
+
Executing the test suite
========================
using makefiles, execute this command while on the top level of your build
directory:
-.. code-block:: bash
+.. code-block:: console
$ make check
target_link_libraries(mycompiler ${REQ_LLVM_LIBRARIES})
+.. _cmake-out-of-source-pass:
+
Developing LLVM pass out of source
----------------------------------
It is possible to develop LLVM passes against installed LLVM. An example of
project layout provided below:
-.. code-block:: bash
+.. code-block:: none
<project dir>/
|
#. Adding ``add_subdirectory(<pass name>)`` line into
``<LLVM root>/lib/Transform/CMakeLists.txt``.
-Compiler/Platform specific topics
+Compiler/Platform-specific topics
=================================
Notes for specific compilers and/or platforms.
**LLVM_COMPILER_JOBS**:STRING
Specifies the maximum number of parallell compiler jobs to use per project
- when building with msbuild or Visual Studio. Only supported for Visual Studio
- 2008 and Visual Studio 2010 CMake generators. 0 means use all
- processors. Default is 0.
+ when building with msbuild or Visual Studio. Only supported for the Visual
+ Studio 2010 CMake generator. 0 means use all processors. Default is 0.
projects / oota-llvm.git / blobdiff