mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
e3176abfc7
I've fixed most of the simple bugs and currently "check-llvm" test suite has 26 failures, and "check-clang" suite has 5 failures. llvm-svn: 216701
575 lines
21 KiB
ReStructuredText
575 lines
21 KiB
ReStructuredText
========================
|
|
Building LLVM with CMake
|
|
========================
|
|
|
|
.. contents::
|
|
:local:
|
|
|
|
Introduction
|
|
============
|
|
|
|
`CMake <http://www.cmake.org/>`_ is a cross-platform build-generator tool. CMake
|
|
does not build the project, it generates the files needed by your build tool
|
|
(GNU make, Visual Studio, etc) for building LLVM.
|
|
|
|
If you are really anxious about getting a functional LLVM build, go to the
|
|
`Quick start`_ section. If you are a CMake novice, start on `Basic CMake usage`_
|
|
and then go back to the `Quick start`_ once you know what you are doing. The
|
|
`Options and variables`_ section is a reference for customizing your build. If
|
|
you already have experience with CMake, this is the recommended starting point.
|
|
|
|
.. _Quick start:
|
|
|
|
Quick start
|
|
===========
|
|
|
|
We use here the command-line, non-interactive CMake interface.
|
|
|
|
#. `Download <http://www.cmake.org/cmake/resources/software.html>`_ and install
|
|
CMake. Version 2.8 is the minimum required.
|
|
|
|
#. Open a shell. Your development tools must be reachable from this shell
|
|
through the PATH environment variable.
|
|
|
|
#. Create a directory for containing the build. It is not supported to build
|
|
LLVM on the source directory. cd to this directory:
|
|
|
|
.. 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:: console
|
|
|
|
$ cmake path/to/llvm/source/root
|
|
|
|
CMake will detect your development environment, perform a series of test and
|
|
generate the files required for building LLVM. CMake will use default values
|
|
for all build parameters. See the `Options and variables`_ section for
|
|
fine-tuning your build
|
|
|
|
This can fail if CMake can't detect your toolset, or if it thinks that the
|
|
environment is not sane enough. On this case make sure that the toolset that
|
|
you intend to use is the only one reachable from the shell and that the shell
|
|
itself is the correct one for you development environment. CMake will refuse
|
|
to build MinGW makefiles if you have a POSIX shell reachable through the PATH
|
|
environment variable, for instance. You can force CMake to use a given build
|
|
tool, see the `Usage`_ section.
|
|
|
|
.. _Basic CMake usage:
|
|
.. _Usage:
|
|
|
|
Basic CMake usage
|
|
=================
|
|
|
|
This section explains basic aspects of CMake, mostly for explaining those
|
|
options which you may need on your day-to-day usage.
|
|
|
|
CMake comes with extensive documentation in the form of html files and on the
|
|
cmake executable itself. Execute ``cmake --help`` for further help options.
|
|
|
|
CMake requires to know for which build tool it shall generate files (GNU make,
|
|
Visual Studio, Xcode, etc). If not specified on the command line, it tries to
|
|
guess it based on you environment. Once identified the build tool, CMake uses
|
|
the corresponding *Generator* for creating files for your build tool. You can
|
|
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:: 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:: console
|
|
|
|
$ 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
|
|
for building with NMake. By default, CMake chooses the more specific generator
|
|
supported by your development environment. If you want an alternative generator,
|
|
you must tell this to CMake with the ``-G`` option.
|
|
|
|
.. todo::
|
|
|
|
Explain variables and cache. Move explanation here from #options section.
|
|
|
|
.. _Options and variables:
|
|
|
|
Options and variables
|
|
=====================
|
|
|
|
Variables customize how the build will be generated. Options are boolean
|
|
variables, with possible values ON/OFF. Options and variables are defined on the
|
|
CMake command line like this:
|
|
|
|
.. 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:: console
|
|
|
|
$ cmake -UVARIABLE path/to/llvm/source
|
|
|
|
Variables are stored on the CMake cache. This is a file named ``CMakeCache.txt``
|
|
on the root of the build directory. Do not hand-edit it.
|
|
|
|
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:: console
|
|
|
|
$ cmake -DVARIABLE:TYPE=value path/to/llvm/source
|
|
|
|
Frequently-used CMake variables
|
|
-------------------------------
|
|
|
|
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``.
|
|
|
|
**CMAKE_BUILD_TYPE**:STRING
|
|
Sets the build type for ``make`` based generators. Possible values are
|
|
Release, Debug, RelWithDebInfo and MinSizeRel. On systems like Visual Studio
|
|
the user sets the build type with the IDE settings.
|
|
|
|
**CMAKE_INSTALL_PREFIX**:PATH
|
|
Path where LLVM will be installed if "make install" is invoked or the
|
|
"INSTALL" target is built.
|
|
|
|
**LLVM_LIBDIR_SUFFIX**:STRING
|
|
Extra suffix to append to the directory where libraries are to be
|
|
installed. On a 64-bit architecture, one could use ``-DLLVM_LIBDIR_SUFFIX=64``
|
|
to install libraries to ``/usr/lib64``.
|
|
|
|
**CMAKE_C_FLAGS**:STRING
|
|
Extra flags to use when compiling C source files.
|
|
|
|
**CMAKE_CXX_FLAGS**:STRING
|
|
Extra flags to use when compiling C++ source files.
|
|
|
|
**BUILD_SHARED_LIBS**:BOOL
|
|
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-specific variables
|
|
-----------------------
|
|
|
|
**LLVM_TARGETS_TO_BUILD**:STRING
|
|
Semicolon-separated list of targets to build, or *all* for building all
|
|
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
|
|
in any case. You can build an tool separately by invoking its target. For
|
|
example, you can build *llvm-as* with a makefile-based system executing *make
|
|
llvm-as* on the root of your build directory.
|
|
|
|
**LLVM_INCLUDE_TOOLS**:BOOL
|
|
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.
|
|
|
|
**LLVM_BUILD_EXAMPLES**:BOOL
|
|
Build LLVM examples. Defaults to OFF. Targets for building each example are
|
|
generated in any case. See documentation for *LLVM_BUILD_TOOLS* above for more
|
|
details.
|
|
|
|
**LLVM_INCLUDE_EXAMPLES**:BOOL
|
|
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.
|
|
|
|
**LLVM_BUILD_TESTS**:BOOL
|
|
Build LLVM unit tests. Defaults to OFF. Targets for building each unit test
|
|
are generated in any case. You can build a specific unit test with the target
|
|
*UnitTestNameTests* (where at this time *UnitTestName* can be ADT, Analysis,
|
|
ExecutionEngine, JIT, Support, Transform, VMCore; see the subdirectories of
|
|
*unittests* for an updated list.) It is possible to build all unit tests with
|
|
the target *UnitTests*.
|
|
|
|
**LLVM_INCLUDE_TESTS**:BOOL
|
|
Generate build targets for the LLVM unit tests. Defaults to ON. You can use
|
|
that option for disabling the generation of build targets for the LLVM unit
|
|
tests.
|
|
|
|
**LLVM_APPEND_VC_REV**:BOOL
|
|
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_ENABLE_EH**:BOOL
|
|
Build LLVM with exception handling support. This is necessary if you wish to
|
|
link against LLVM libraries and make use of C++ exceptions in your own code
|
|
that need to propagate through LLVM code. Defaults to OFF.
|
|
|
|
**LLVM_ENABLE_PIC**:BOOL
|
|
Add the ``-fPIC`` flag for the compiler command-line, if the compiler supports
|
|
this flag. Some systems, like Windows, do not need this flag. Defaults to ON.
|
|
|
|
**LLVM_ENABLE_RTTI**:BOOL
|
|
Build LLVM with run time type information. Defaults to OFF.
|
|
|
|
**LLVM_ENABLE_WARNINGS**:BOOL
|
|
Enable all compiler warnings. Defaults to ON.
|
|
|
|
**LLVM_ENABLE_PEDANTIC**:BOOL
|
|
Enable pedantic mode. This disable compiler specific extensions, is
|
|
possible. Defaults to ON.
|
|
|
|
**LLVM_ENABLE_WERROR**:BOOL
|
|
Stop and fail build, if a compiler warning is triggered. Defaults to OFF.
|
|
|
|
**LLVM_BUILD_32_BITS**:BOOL
|
|
Build 32-bits executables and libraries on 64-bits systems. This option is
|
|
available only on some 64-bits unix systems. Defaults to OFF.
|
|
|
|
**LLVM_TARGET_ARCH**:STRING
|
|
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.
|
|
|
|
**LLVM_TABLEGEN**:STRING
|
|
Full path to a native TableGen executable (usually named ``tblgen``). This is
|
|
intended for cross-compiling: if the user sets this variable, no native
|
|
TableGen will be created.
|
|
|
|
**LLVM_LIT_ARGS**:STRING
|
|
Arguments given to lit. ``make check`` and ``make clang-test`` are affected.
|
|
By default, ``'-sv --no-progress-bar'`` on Visual C++ and Xcode, ``'-sv'`` on
|
|
others.
|
|
|
|
**LLVM_LIT_TOOLS_DIR**:PATH
|
|
The path to GnuWin32 tools for tests. Valid on Windows host. Defaults to "",
|
|
then Lit seeks tools according to %PATH%. Lit can find tools(eg. grep, sort,
|
|
&c) on LLVM_LIT_TOOLS_DIR at first, without specifying GnuWin32 to %PATH%.
|
|
|
|
**LLVM_ENABLE_FFI**:BOOL
|
|
Indicates whether LLVM Interpreter will be linked with Foreign Function
|
|
Interface library. If the library or its headers are installed on a custom
|
|
location, you can set the variables FFI_INCLUDE_DIR and
|
|
FFI_LIBRARY_DIR. Defaults to OFF.
|
|
|
|
**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 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``, ``MemoryWithOrigins`` and ``Undefined``.
|
|
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.
|
|
|
|
**SPHINX_WARNINGS_AS_ERRORS**:BOOL
|
|
If enabled then sphinx documentation warnings will be treated as
|
|
errors. Defaults to ON.
|
|
|
|
Executing the test suite
|
|
========================
|
|
|
|
Testing is performed when the *check* target is built. For instance, if you are
|
|
using makefiles, execute this command while on the top level of your build
|
|
directory:
|
|
|
|
.. code-block:: console
|
|
|
|
$ make check
|
|
|
|
On Visual Studio, you may run tests to build the project "check".
|
|
|
|
Cross compiling
|
|
===============
|
|
|
|
See `this wiki page <http://www.vtk.org/Wiki/CMake_Cross_Compiling>`_ for
|
|
generic instructions on how to cross-compile with CMake. It goes into detailed
|
|
explanations and may seem daunting, but it is not. On the wiki page there are
|
|
several examples including toolchain files. Go directly to `this section
|
|
<http://www.vtk.org/Wiki/CMake_Cross_Compiling#Information_how_to_set_up_various_cross_compiling_toolchains>`_
|
|
for a quick solution.
|
|
|
|
Also see the `LLVM-specific variables`_ section for variables used when
|
|
cross-compiling.
|
|
|
|
Embedding LLVM in your project
|
|
==============================
|
|
|
|
From LLVM 3.5 onwards both the CMake and autoconf/Makefile build systems export
|
|
LLVM libraries as importable CMake targets. This means that clients of LLVM can
|
|
now reliably use CMake to develop their own LLVM based projects against an
|
|
installed version of LLVM regardless of how it was built.
|
|
|
|
Here is a simple example of CMakeLists.txt file that imports the LLVM libraries
|
|
and uses them to build a simple application ``simple-tool``.
|
|
|
|
.. code-block:: cmake
|
|
|
|
cmake_minimum_required(VERSION 2.8.8)
|
|
project(SimpleProject)
|
|
|
|
find_package(LLVM REQUIRED CONFIG)
|
|
|
|
message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
|
|
message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")
|
|
|
|
# Set your project compile flags.
|
|
# E.g. if using the C++ header files
|
|
# you will need to enable C++11 support
|
|
# for your compiler.
|
|
|
|
include_directories(${LLVM_INCLUDE_DIRS})
|
|
add_definitions(${LLVM_DEFINITIONS})
|
|
|
|
# Now build our tools
|
|
add_excutable(simple-tool tool.cpp)
|
|
|
|
# Find the libraries that correspond to the LLVM components
|
|
# that we wish to use
|
|
llvm_map_components_to_libnames(llvm_libs support core irreader)
|
|
|
|
# Link against LLVM libraries
|
|
target_link_libraries(simple-tool ${llvm_libs})
|
|
|
|
The ``find_package(...)`` directive when used in CONFIG mode (as in the above
|
|
example) will look for the ``LLVMConfig.cmake`` file in various locations (see
|
|
cmake manual for details). It creates a ``LLVM_DIR`` cache entry to save the
|
|
directory where ``LLVMConfig.cmake`` is found or allows the user to specify the
|
|
directory (e.g. by passing ``-DLLVM_DIR=/usr/share/llvm/cmake`` to
|
|
the ``cmake`` command or by setting it directly in ``ccmake`` or ``cmake-gui``).
|
|
|
|
This file is available in two different locations.
|
|
|
|
* ``<INSTALL_PREFIX>/share/llvm/cmake/LLVMConfig.cmake`` where
|
|
``<INSTALL_PREFIX>`` is the install prefix of an installed version of LLVM.
|
|
On Linux typically this is ``/usr/share/llvm/cmake/LLVMConfig.cmake``.
|
|
|
|
* ``<LLVM_BUILD_ROOT>/share/llvm/cmake/LLVMConfig.cmake`` where
|
|
``<LLVM_BUILD_ROOT>`` is the root of the LLVM build tree. **Note this only
|
|
available when building LLVM with CMake**
|
|
|
|
If LLVM is installed in your operating system's normal installation prefix (e.g.
|
|
on Linux this is usually ``/usr/``) ``find_package(LLVM ...)`` will
|
|
automatically find LLVM if it is installed correctly. If LLVM is not installed
|
|
or you wish to build directly against the LLVM build tree you can use
|
|
``LLVM_DIR`` as previously mentioned.
|
|
|
|
The ``LLVMConfig.cmake`` file sets various useful variables. Notable variables
|
|
include
|
|
|
|
``LLVM_CMAKE_DIR``
|
|
The path to the LLVM CMake directory (i.e. the directory containing
|
|
LLVMConfig.cmake).
|
|
|
|
``LLVM_DEFINITIONS``
|
|
A list of preprocessor defines that should be used when building against LLVM.
|
|
|
|
``LLVM_ENABLE_ASSERTIONS``
|
|
This is set to ON if LLVM was built with assertions, otherwise OFF.
|
|
|
|
``LLVM_ENABLE_EH``
|
|
This is set to ON if LLVM was built with exception handling (EH) enabled,
|
|
otherwise OFF.
|
|
|
|
``LLVM_ENABLE_RTTI``
|
|
This is set to ON if LLVM was built with run time type information (RTTI),
|
|
otherwise OFF.
|
|
|
|
``LLVM_INCLUDE_DIRS``
|
|
A list of include paths to directories containing LLVM header files.
|
|
|
|
``LLVM_PACKAGE_VERSION``
|
|
The LLVM version. This string can be used with CMake conditionals. E.g. ``if
|
|
(${LLVM_PACKAGE_VERSION} VERSION_LESS "3.5")``.
|
|
|
|
``LLVM_TOOLS_BINARY_DIR``
|
|
The path to the directory containing the LLVM tools (e.g. ``llvm-as``).
|
|
|
|
Notice that in the above example we link ``simple-tool`` against several LLVM
|
|
libraries. The list of libraries is determined by using the
|
|
``llvm_map_components_to_libnames()`` CMake function. For a list of available
|
|
components look at the output of running ``llvm-config --components``.
|
|
|
|
Note that for LLVM < 3.5 ``llvm_map_components_to_libraries()`` was
|
|
used instead of ``llvm_map_components_to_libnames()``. This is now deprecated
|
|
and will be removed in a future version of LLVM.
|
|
|
|
.. _cmake-out-of-source-pass:
|
|
|
|
Developing LLVM passes out of source
|
|
------------------------------------
|
|
|
|
It is possible to develop LLVM passes out of LLVM's source tree (i.e. against an
|
|
installed or built LLVM). An example of a project layout is provided below.
|
|
|
|
.. code-block:: none
|
|
|
|
<project dir>/
|
|
|
|
|
CMakeLists.txt
|
|
<pass name>/
|
|
|
|
|
CMakeLists.txt
|
|
Pass.cpp
|
|
...
|
|
|
|
Contents of ``<project dir>/CMakeLists.txt``:
|
|
|
|
.. code-block:: cmake
|
|
|
|
find_package(LLVM REQUIRED CONFIG)
|
|
|
|
add_definitions(${LLVM_DEFINITIONS})
|
|
include_directories(${LLVM_INCLUDE_DIRS})
|
|
|
|
add_subdirectory(<pass name>)
|
|
|
|
Contents of ``<project dir>/<pass name>/CMakeLists.txt``:
|
|
|
|
.. code-block:: cmake
|
|
|
|
add_library(LLVMPassname MODULE Pass.cpp)
|
|
|
|
Note if you intend for this pass to be merged into the LLVM source tree at some
|
|
point in the future it might make more sense to use LLVM's internal
|
|
add_llvm_loadable_module function instead by...
|
|
|
|
|
|
Adding the following to ``<project dir>/CMakeLists.txt`` (after
|
|
``find_package(LLVM ...)``)
|
|
|
|
.. code-block:: cmake
|
|
|
|
list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_DIR}")
|
|
include(AddLLVM)
|
|
|
|
And then changing ``<project dir>/<pass name>/CMakeLists.txt`` to
|
|
|
|
.. code-block:: cmake
|
|
|
|
add_llvm_loadable_module(LLVMPassname
|
|
Pass.cpp
|
|
)
|
|
|
|
When you are done developing your pass, you may wish to integrate it
|
|
into LLVM source tree. You can achieve it in two easy steps:
|
|
|
|
#. Copying ``<pass name>`` folder into ``<LLVM root>/lib/Transform`` directory.
|
|
|
|
#. Adding ``add_subdirectory(<pass name>)`` line into
|
|
``<LLVM root>/lib/Transform/CMakeLists.txt``.
|
|
|
|
Compiler/Platform-specific topics
|
|
=================================
|
|
|
|
Notes for specific compilers and/or platforms.
|
|
|
|
Microsoft Visual C++
|
|
--------------------
|
|
|
|
**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 the Visual
|
|
Studio 2010 CMake generator. 0 means use all processors. Default is 0.
|