CMakeLists.txt - native_client/pnacl-clang - Git at Google

 cmake_minimum_required(VERSION 2.8.8)

 # FIXME: It may be removed when we use 2.8.12.
 if(CMAKE_VERSION VERSION_LESS 2.8.12)
   # Invalidate a couple of keywords.
   set(cmake_2_8_12_INTERFACE)
   set(cmake_2_8_12_PRIVATE)
 else()
   # Use ${cmake_2_8_12_KEYWORD} intead of KEYWORD in target_link_libraries().
   set(cmake_2_8_12_INTERFACE INTERFACE)
   set(cmake_2_8_12_PRIVATE PRIVATE)
   if(POLICY CMP0022)
     cmake_policy(SET CMP0022 NEW) # automatic when 2.8.12 is required
   endif()
 endif()

 # If we are not building as a part of LLVM, build Clang as an
 # standalone project, using LLVM as an external library:
 if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR )
   project(Clang)

   # Rely on llvm-config.
   set(CONFIG_OUTPUT)
   find_program(LLVM_CONFIG "llvm-config")
   if(LLVM_CONFIG)
     message(STATUS "Found LLVM_CONFIG as ${LLVM_CONFIG}")
     set(CONFIG_COMMAND ${LLVM_CONFIG}
       "--assertion-mode"
       "--bindir"
       "--libdir"
       "--includedir"
       "--prefix"
       "--src-root")
     execute_process(
       COMMAND ${CONFIG_COMMAND}
       RESULT_VARIABLE HAD_ERROR
       OUTPUT_VARIABLE CONFIG_OUTPUT
     )
     if(NOT HAD_ERROR)
       string(REGEX REPLACE
         "[ \t]*[\r\n]+[ \t]*" ";"
         CONFIG_OUTPUT ${CONFIG_OUTPUT})
     else()
       string(REPLACE ";" " " CONFIG_COMMAND_STR "${CONFIG_COMMAND}")
       message(STATUS "${CONFIG_COMMAND_STR}")
       message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
     endif()
   else()
     message(FATAL_ERROR "llvm-config not found -- ${LLVM_CONFIG}")
   endif()

   list(GET CONFIG_OUTPUT 0 ENABLE_ASSERTIONS)
   list(GET CONFIG_OUTPUT 1 TOOLS_BINARY_DIR)
   list(GET CONFIG_OUTPUT 2 LIBRARY_DIR)
   list(GET CONFIG_OUTPUT 3 INCLUDE_DIR)
   list(GET CONFIG_OUTPUT 4 LLVM_OBJ_ROOT)
   list(GET CONFIG_OUTPUT 5 MAIN_SRC_DIR)

   if(NOT MSVC_IDE)
     set(LLVM_ENABLE_ASSERTIONS ${ENABLE_ASSERTIONS}
       CACHE BOOL "Enable assertions")
     # Assertions should follow llvm-config's.
     mark_as_advanced(LLVM_ENABLE_ASSERTIONS)
   endif()

   set(LLVM_TOOLS_BINARY_DIR ${TOOLS_BINARY_DIR} CACHE PATH "Path to llvm/bin")
   set(LLVM_LIBRARY_DIR ${LIBRARY_DIR} CACHE PATH "Path to llvm/lib")
   set(LLVM_MAIN_INCLUDE_DIR ${INCLUDE_DIR} CACHE PATH "Path to llvm/include")
   set(LLVM_BINARY_DIR ${LLVM_OBJ_ROOT} CACHE PATH "Path to LLVM build tree")
   set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")

   find_program(LLVM_TABLEGEN_EXE "llvm-tblgen" ${LLVM_TOOLS_BINARY_DIR}
     NO_DEFAULT_PATH)

   set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR}/share/llvm/cmake")
   set(LLVMCONFIG_FILE "${LLVM_CMAKE_PATH}/LLVMConfig.cmake")
   if(EXISTS ${LLVMCONFIG_FILE})
     list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
     include(${LLVMCONFIG_FILE})
   else()
     message(FATAL_ERROR "Not found: ${LLVMCONFIG_FILE}")
   endif()

   # They are used as destination of target generators.
   set(LLVM_RUNTIME_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin)
   set(LLVM_LIBRARY_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
   if(WIN32 OR CYGWIN)
     # DLL platform -- put DLLs into bin.
     set(LLVM_SHLIB_OUTPUT_INTDIR ${LLVM_RUNTIME_OUTPUT_INTDIR})
   else()
     set(LLVM_SHLIB_OUTPUT_INTDIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
   endif()

   option(LLVM_INSTALL_TOOLCHAIN_ONLY
     "Only include toolchain files in the 'install' target." OFF)

   option(LLVM_FORCE_USE_OLD_HOST_TOOLCHAIN
     "Set to ON to force using an old, unsupported host toolchain." OFF)

   include(AddLLVM)
   include(TableGen)
   include(HandleLLVMOptions)

   set(PACKAGE_VERSION "${LLVM_PACKAGE_VERSION}")

   if (NOT DEFINED LLVM_INCLUDE_TESTS)
     set(LLVM_INCLUDE_TESTS ON)
   endif()

   include_directories("${LLVM_BINARY_DIR}/include" "${LLVM_MAIN_INCLUDE_DIR}")
   link_directories("${LLVM_LIBRARY_DIR}")

   set( CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin )
   set( CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX} )
   set( CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX} )

   if(LLVM_INCLUDE_TESTS)
     # Check prebuilt llvm/utils.
     if(EXISTS ${LLVM_TOOLS_BINARY_DIR}/FileCheck${CMAKE_EXECUTABLE_SUFFIX}
         AND EXISTS ${LLVM_TOOLS_BINARY_DIR}/count${CMAKE_EXECUTABLE_SUFFIX}
         AND EXISTS ${LLVM_TOOLS_BINARY_DIR}/not${CMAKE_EXECUTABLE_SUFFIX})
       set(LLVM_UTILS_PROVIDED ON)
     endif()

     if(EXISTS ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
       set(LLVM_LIT ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
       if(NOT LLVM_UTILS_PROVIDED)
         add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/FileCheck utils/FileCheck)
         add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/count utils/count)
         add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/not utils/not)
         set(LLVM_UTILS_PROVIDED ON)
         set(CLANG_TEST_DEPS FileCheck count not)
       endif()
       set(UNITTEST_DIR ${LLVM_MAIN_SRC_DIR}/utils/unittest)
       if(EXISTS ${UNITTEST_DIR}/googletest/include/gtest/gtest.h
           AND NOT EXISTS ${LLVM_LIBRARY_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}gtest${CMAKE_STATIC_LIBRARY_SUFFIX}
           AND EXISTS ${UNITTEST_DIR}/CMakeLists.txt)
         add_subdirectory(${UNITTEST_DIR} utils/unittest)
       endif()
     else()
       # Seek installed Lit.
       find_program(LLVM_LIT "lit.py" ${LLVM_MAIN_SRC_DIR}/utils/lit
         DOC "Path to lit.py")
     endif()

     if(LLVM_LIT)
       # Define the default arguments to use with 'lit', and an option for the user
       # to override.
       set(LIT_ARGS_DEFAULT "-sv")
       if (MSVC OR XCODE)
         set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
       endif()
       set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit")

       # On Win32 hosts, provide an option to specify the path to the GnuWin32 tools.
       if( WIN32 AND NOT CYGWIN )
         set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools")
       endif()
     else()
       set(LLVM_INCLUDE_TESTS OFF)
     endif()
   endif()

   set( CLANG_BUILT_STANDALONE 1 )
   set(BACKEND_PACKAGE_STRING "LLVM ${LLVM_PACKAGE_VERSION}")
 else()
   set(BACKEND_PACKAGE_STRING "${PACKAGE_STRING}")
 endif()

 find_package(LibXml2)
 if (LIBXML2_FOUND)
   set(CLANG_HAVE_LIBXML 1)
 endif()

 set(CLANG_RESOURCE_DIR "" CACHE STRING
   "Relative directory from the Clang binary to its resource files.")

 set(C_INCLUDE_DIRS "" CACHE STRING
   "Colon separated list of directories clang will search for headers.")

 set(GCC_INSTALL_PREFIX "" CACHE PATH "Directory where gcc is installed." )
 set(DEFAULT_SYSROOT "" CACHE PATH
   "Default <path> to all compiler invocations for --sysroot=<path>." )

 set(CLANG_VENDOR "" CACHE STRING
   "Vendor-specific text for showing with version information.")

 if( CLANG_VENDOR )
   add_definitions( -DCLANG_VENDOR="${CLANG_VENDOR} " )
 endif()

 set(CLANG_REPOSITORY_STRING "" CACHE STRING
   "Vendor-specific text for showing the repository the source is taken from.")

 if(CLANG_REPOSITORY_STRING)
   add_definitions(-DCLANG_REPOSITORY_STRING="${CLANG_REPOSITORY_STRING}")
 endif()

 set(CLANG_VENDOR_UTI "org.llvm.clang" CACHE STRING
   "Vendor-specific uti.")

 # The libdir suffix must exactly match whatever LLVM's configuration used.
 set(CLANG_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}")

 set(CLANG_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 set(CLANG_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})

 if( CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR AND NOT MSVC_IDE )
   message(FATAL_ERROR "In-source builds are not allowed. CMake would overwrite "
 "the makefiles distributed with LLVM. Please create a directory and run cmake "
 "from there, passing the path to this source directory as the last argument. "
 "This process created the file `CMakeCache.txt' and the directory "
 "`CMakeFiles'. Please delete them.")
 endif()

 if( NOT CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR )
   file(GLOB_RECURSE
     tablegenned_files_on_include_dir
     "${CLANG_SOURCE_DIR}/include/clang/*.inc")
   if( tablegenned_files_on_include_dir )
     message(FATAL_ERROR "Apparently there is a previous in-source build, "
 "probably as the result of running `configure' and `make' on "
 "${CLANG_SOURCE_DIR}. This may cause problems. The suspicious files are:\n"
 "${tablegenned_files_on_include_dir}\nPlease clean the source directory.")
   endif()
 endif()

 # Compute the Clang version from the LLVM version.
 string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
   ${PACKAGE_VERSION})
 message(STATUS "Clang version: ${CLANG_VERSION}")

 string(REGEX REPLACE "([0-9]+)\\.[0-9]+(\\.[0-9]+)?" "\\1" CLANG_VERSION_MAJOR
   ${CLANG_VERSION})
 string(REGEX REPLACE "[0-9]+\\.([0-9]+)(\\.[0-9]+)?" "\\1" CLANG_VERSION_MINOR
   ${CLANG_VERSION})
 if (${CLANG_VERSION} MATCHES "[0-9]+\\.[0-9]+\\.[0-9]+")
   set(CLANG_HAS_VERSION_PATCHLEVEL 1)
   string(REGEX REPLACE "[0-9]+\\.[0-9]+\\.([0-9]+)" "\\1" CLANG_VERSION_PATCHLEVEL
     ${CLANG_VERSION})
 else()
   set(CLANG_HAS_VERSION_PATCHLEVEL 0)
 endif()

 # Configure the Version.inc file.
 configure_file(
   ${CMAKE_CURRENT_SOURCE_DIR}/include/clang/Basic/Version.inc.in
   ${CMAKE_CURRENT_BINARY_DIR}/include/clang/Basic/Version.inc)

 # Add appropriate flags for GCC
 if (LLVM_COMPILER_IS_GCC_COMPATIBLE)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-common -Woverloaded-virtual -fno-strict-aliasing")

   # Enable -pedantic for Clang even if it's not enabled for LLVM.
   if (NOT LLVM_ENABLE_PEDANTIC)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pedantic -Wno-long-long")
   endif ()

   check_cxx_compiler_flag("-Werror -Wnested-anon-types" CXX_SUPPORTS_NO_NESTED_ANON_TYPES_FLAG)
   if( CXX_SUPPORTS_NO_NESTED_ANON_TYPES_FLAG )
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-nested-anon-types" )
   endif()
 endif ()

 # Determine HOST_LINK_VERSION on Darwin.
 set(HOST_LINK_VERSION)
 if (APPLE)
   set(LD_V_OUTPUT)
   execute_process(
     COMMAND sh -c "${CMAKE_LINKER} -v 2>&1 | head -1"
     RESULT_VARIABLE HAD_ERROR
     OUTPUT_VARIABLE LD_V_OUTPUT
   )
   if (NOT HAD_ERROR)
     if ("${LD_V_OUTPUT}" MATCHES ".*ld64-([0-9.]+).*")
       string(REGEX REPLACE ".*ld64-([0-9.]+).*" "\\1" HOST_LINK_VERSION ${LD_V_OUTPUT})
     elseif ("${LD_V_OUTPUT}" MATCHES "[^0-9]*([0-9.]+).*")
       string(REGEX REPLACE "[^0-9]*([0-9.]+).*" "\\1" HOST_LINK_VERSION ${LD_V_OUTPUT})
     endif()
   else()
     message(FATAL_ERROR "${CMAKE_LINKER} failed with status ${HAD_ERROR}")
   endif()
 endif()

 configure_file(
   ${CLANG_SOURCE_DIR}/include/clang/Config/config.h.cmake
   ${CLANG_BINARY_DIR}/include/clang/Config/config.h)

 include(CMakeParseArguments)

 function(clang_tablegen)
   # Syntax:
   # clang_tablegen output-file [tablegen-arg ...] SOURCE source-file
   # [[TARGET cmake-target-name] [DEPENDS extra-dependency ...]]
   #
   # Generates a custom command for invoking tblgen as
   #
   # tblgen source-file -o=output-file tablegen-arg ...
   #
   # and, if cmake-target-name is provided, creates a custom target for
   # executing the custom command depending on output-file. It is
   # possible to list more files to depend after DEPENDS.

   cmake_parse_arguments(CTG "" "SOURCE;TARGET" "" ${ARGN})

   if( NOT CTG_SOURCE )
     message(FATAL_ERROR "SOURCE source-file required by clang_tablegen")
   endif()

   set( LLVM_TARGET_DEFINITIONS ${CTG_SOURCE} )
   tablegen(CLANG ${CTG_UNPARSED_ARGUMENTS})

   if(CTG_TARGET)
     add_public_tablegen_target(${CTG_TARGET})
     set_target_properties( ${CTG_TARGET} PROPERTIES FOLDER "Clang tablegenning")
     set_property(GLOBAL APPEND PROPERTY CLANG_TABLEGEN_TARGETS ${CTG_TARGET})
   endif()
 endfunction(clang_tablegen)

 macro(add_clang_library name)
   cmake_parse_arguments(ARG
     ""
     ""
     "ADDITIONAL_HEADERS"
     ${ARGN})
   set(srcs)
   if(MSVC_IDE OR XCODE)
     # Add public headers
     file(RELATIVE_PATH lib_path
       ${CLANG_SOURCE_DIR}/lib/
       ${CMAKE_CURRENT_SOURCE_DIR}
     )
     if(NOT lib_path MATCHES "^[.][.]")
       file( GLOB_RECURSE headers
         ${CLANG_SOURCE_DIR}/include/clang/${lib_path}/*.h
         ${CLANG_SOURCE_DIR}/include/clang/${lib_path}/*.def
       )
       set_source_files_properties(${headers} PROPERTIES HEADER_FILE_ONLY ON)

       file( GLOB_RECURSE tds
         ${CLANG_SOURCE_DIR}/include/clang/${lib_path}/*.td
       )
       source_group("TableGen descriptions" FILES ${tds})
       set_source_files_properties(${tds}} PROPERTIES HEADER_FILE_ONLY ON)

       if(headers OR tds)
 	set(srcs ${headers} ${tds})
       endif()
     endif()
   endif(MSVC_IDE OR XCODE)
   if(srcs OR ARG_ADDITIONAL_HEADERS)
     set(srcs
       ADDITIONAL_HEADERS
       ${srcs}
       ${ARG_ADDITIONAL_HEADERS} # It may contain unparsed unknown args.
       )
   endif()
   llvm_add_library(${name} ${ARG_UNPARSED_ARGUMENTS} ${srcs})

   if(TARGET ${name})
     target_link_libraries(${name} ${cmake_2_8_12_INTERFACE} ${LLVM_COMMON_LIBS})

     if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY OR ${name} STREQUAL "libclang")
       install(TARGETS ${name}
         LIBRARY DESTINATION lib${LLVM_LIBDIR_SUFFIX}
         ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX}
         RUNTIME DESTINATION bin)
     endif()
     set_property(GLOBAL APPEND PROPERTY CLANG_EXPORTS ${name})
   else()
     # Add empty "phony" target
     add_custom_target(${name})
   endif()

   set_target_properties(${name} PROPERTIES FOLDER "Clang libraries")
 endmacro(add_clang_library)

 macro(add_clang_executable name)
   add_llvm_executable( ${name} ${ARGN} )
   set_target_properties(${name} PROPERTIES FOLDER "Clang executables")
 endmacro(add_clang_executable)

 set(CMAKE_INCLUDE_CURRENT_DIR ON)

 include_directories(BEFORE
   ${CMAKE_CURRENT_BINARY_DIR}/include
   ${CMAKE_CURRENT_SOURCE_DIR}/include
   )

 if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
   install(DIRECTORY include/clang include/clang-c
     DESTINATION include
     FILES_MATCHING
     PATTERN "*.def"
     PATTERN "*.h"
     PATTERN "config.h" EXCLUDE
     PATTERN ".svn" EXCLUDE
     )

   install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/include/clang
     DESTINATION include
     FILES_MATCHING
     PATTERN "CMakeFiles" EXCLUDE
     PATTERN "*.inc"
     PATTERN "*.h"
     )
 endif()

 install(DIRECTORY include/clang-c
   DESTINATION include
   FILES_MATCHING
   PATTERN "*.h"
   PATTERN ".svn" EXCLUDE
   )

 add_definitions( -D_GNU_SOURCE )

 option(CLANG_ENABLE_ARCMT "Build ARCMT." ON)
 if (CLANG_ENABLE_ARCMT)
   set(ENABLE_CLANG_ARCMT "1")
 else()
   set(ENABLE_CLANG_ARCMT "0")
 endif()

 option(CLANG_ENABLE_STATIC_ANALYZER "Build static analyzer." ON)
 if (CLANG_ENABLE_STATIC_ANALYZER)
   set(ENABLE_CLANG_STATIC_ANALYZER "1")
 else()
   set(ENABLE_CLANG_STATIC_ANALYZER "0")
 endif()

 if (NOT CLANG_ENABLE_STATIC_ANALYZER AND CLANG_ENABLE_ARCMT)
   message(FATAL_ERROR "Cannot disable static analyzer while enabling ARCMT")
 endif()

 if(CLANG_ENABLE_ARCMT)
   add_definitions(-DCLANG_ENABLE_ARCMT)
   add_definitions(-DCLANG_ENABLE_OBJC_REWRITER)
 endif()
 if(CLANG_ENABLE_STATIC_ANALYZER)
   add_definitions(-DCLANG_ENABLE_STATIC_ANALYZER)
 endif()

 # Clang version information
 set(CLANG_EXECUTABLE_VERSION
      "${CLANG_VERSION_MAJOR}.${CLANG_VERSION_MINOR}" CACHE STRING
     "Version number that will be placed into the clang executable, in the form XX.YY")
 set(LIBCLANG_LIBRARY_VERSION
      "${CLANG_VERSION_MAJOR}.${CLANG_VERSION_MINOR}" CACHE STRING
     "Version number that will be placed into the libclang library , in the form XX.YY")
 mark_as_advanced(CLANG_EXECUTABLE_VERSION LIBCLANG_LIBRARY_VERSION)

 add_subdirectory(utils/TableGen)

 add_subdirectory(include)

 # All targets below may depend on all tablegen'd files.
 get_property(CLANG_TABLEGEN_TARGETS GLOBAL PROPERTY CLANG_TABLEGEN_TARGETS)
 list(APPEND LLVM_COMMON_DEPENDS ${CLANG_TABLEGEN_TARGETS})

 add_subdirectory(lib)
 add_subdirectory(tools)
 add_subdirectory(runtime)

 option(CLANG_BUILD_EXAMPLES "Build CLANG example programs by default." OFF)
 if (CLANG_BUILD_EXAMPLES)
   set(ENABLE_CLANG_EXAMPLES "1")
 else()
   set(ENABLE_CLANG_EXAMPLES "0")
 endif()
 add_subdirectory(examples)

 option(CLANG_INCLUDE_TESTS
        "Generate build targets for the Clang unit tests."
        ${LLVM_INCLUDE_TESTS})

 if( CLANG_INCLUDE_TESTS )
   if(EXISTS ${LLVM_MAIN_SRC_DIR}/utils/unittest/googletest/include/gtest/gtest.h)
     add_subdirectory(unittests)
     list(APPEND CLANG_TEST_DEPS ClangUnitTests)
     list(APPEND CLANG_TEST_PARAMS
       clang_unit_site_config=${CMAKE_CURRENT_BINARY_DIR}/test/Unit/lit.site.cfg
       )
   endif()
   add_subdirectory(test)

   if(CLANG_BUILT_STANDALONE)
     # Add a global check rule now that all subdirectories have been traversed
     # and we know the total set of lit testsuites.
     get_property(LLVM_LIT_TESTSUITES GLOBAL PROPERTY LLVM_LIT_TESTSUITES)
     get_property(LLVM_LIT_PARAMS GLOBAL PROPERTY LLVM_LIT_PARAMS)
     get_property(LLVM_LIT_DEPENDS GLOBAL PROPERTY LLVM_LIT_DEPENDS)
     get_property(LLVM_LIT_EXTRA_ARGS GLOBAL PROPERTY LLVM_LIT_EXTRA_ARGS)
     add_lit_target(check-all
       "Running all regression tests"
       ${LLVM_LIT_TESTSUITES}
       PARAMS ${LLVM_LIT_PARAMS}
       DEPENDS ${LLVM_LIT_DEPENDS}
       ARGS ${LLVM_LIT_EXTRA_ARGS}
       )
   endif()
 endif()

 option(CLANG_INCLUDE_DOCS "Generate build targets for the Clang docs."
   ${LLVM_INCLUDE_DOCS})
 if( CLANG_INCLUDE_DOCS )
   add_subdirectory(docs)
 endif()

 set(CLANG_ORDER_FILE "" CACHE FILEPATH
   "Order file to use when compiling clang in order to improve startup time.")

 if (CLANG_BUILT_STANDALONE)
   # Generate a list of CMake library targets so that other CMake projects can
   # link against them. LLVM calls its version of this file LLVMExports.cmake, but
   # the usual CMake convention seems to be ${Project}Targets.cmake.
   set(CLANG_INSTALL_PACKAGE_DIR share/clang/cmake)
   set(clang_cmake_builddir "${CMAKE_BINARY_DIR}/${CLANG_INSTALL_PACKAGE_DIR}")
   get_property(CLANG_EXPORTS GLOBAL PROPERTY CLANG_EXPORTS)
   export(TARGETS ${CLANG_EXPORTS} FILE ${clang_cmake_builddir}/ClangTargets.cmake)

   # Install a <prefix>/share/clang/cmake/ClangConfig.cmake file so that
   # find_package(Clang) works. Install the target list with it.
   install(FILES
     ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules/ClangConfig.cmake
     ${CLANG_BINARY_DIR}/share/clang/cmake/ClangTargets.cmake
     DESTINATION share/clang/cmake)

   # Also copy ClangConfig.cmake to the build directory so that dependent projects
   # can build against a build directory of Clang more easily.
   configure_file(
     ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules/ClangConfig.cmake
     ${CLANG_BINARY_DIR}/share/clang/cmake/ClangConfig.cmake
     COPYONLY)
 endif ()
	cmake_minimum_required(VERSION 2.8.8)

	# FIXME: It may be removed when we use 2.8.12.
	if(CMAKE_VERSION VERSION_LESS 2.8.12)
	# Invalidate a couple of keywords.
	set(cmake_2_8_12_INTERFACE)
	set(cmake_2_8_12_PRIVATE)
	else()
	# Use ${cmake_2_8_12_KEYWORD} intead of KEYWORD in target_link_libraries().
	set(cmake_2_8_12_INTERFACE INTERFACE)
	set(cmake_2_8_12_PRIVATE PRIVATE)
	if(POLICY CMP0022)
	cmake_policy(SET CMP0022 NEW) # automatic when 2.8.12 is required
	endif()
	endif()

	# If we are not building as a part of LLVM, build Clang as an
	# standalone project, using LLVM as an external library:
	if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR )
	project(Clang)

	# Rely on llvm-config.
	set(CONFIG_OUTPUT)
	find_program(LLVM_CONFIG "llvm-config")
	if(LLVM_CONFIG)
	message(STATUS "Found LLVM_CONFIG as ${LLVM_CONFIG}")
	set(CONFIG_COMMAND ${LLVM_CONFIG}
	"--assertion-mode"
	"--bindir"
	"--libdir"
	"--includedir"
	"--prefix"
	"--src-root")
	execute_process(
	COMMAND ${CONFIG_COMMAND}
	RESULT_VARIABLE HAD_ERROR
	OUTPUT_VARIABLE CONFIG_OUTPUT
	)
	if(NOT HAD_ERROR)
	string(REGEX REPLACE
	"[ \t][\r\n]+[ \t]" ";"
	CONFIG_OUTPUT ${CONFIG_OUTPUT})
	else()
	string(REPLACE ";" " " CONFIG_COMMAND_STR "${CONFIG_COMMAND}")
	message(STATUS "${CONFIG_COMMAND_STR}")
	message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
	endif()
	else()
	message(FATAL_ERROR "llvm-config not found -- ${LLVM_CONFIG}")
	endif()

	list(GET CONFIG_OUTPUT 0 ENABLE_ASSERTIONS)
	list(GET CONFIG_OUTPUT 1 TOOLS_BINARY_DIR)
	list(GET CONFIG_OUTPUT 2 LIBRARY_DIR)
	list(GET CONFIG_OUTPUT 3 INCLUDE_DIR)
	list(GET CONFIG_OUTPUT 4 LLVM_OBJ_ROOT)
	list(GET CONFIG_OUTPUT 5 MAIN_SRC_DIR)

	if(NOT MSVC_IDE)
	set(LLVM_ENABLE_ASSERTIONS ${ENABLE_ASSERTIONS}
	CACHE BOOL "Enable assertions")
	# Assertions should follow llvm-config's.
	mark_as_advanced(LLVM_ENABLE_ASSERTIONS)
	endif()

	set(LLVM_TOOLS_BINARY_DIR ${TOOLS_BINARY_DIR} CACHE PATH "Path to llvm/bin")
	set(LLVM_LIBRARY_DIR ${LIBRARY_DIR} CACHE PATH "Path to llvm/lib")
	set(LLVM_MAIN_INCLUDE_DIR ${INCLUDE_DIR} CACHE PATH "Path to llvm/include")
	set(LLVM_BINARY_DIR ${LLVM_OBJ_ROOT} CACHE PATH "Path to LLVM build tree")
	set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")

	find_program(LLVM_TABLEGEN_EXE "llvm-tblgen" ${LLVM_TOOLS_BINARY_DIR}
	NO_DEFAULT_PATH)

	set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR}/share/llvm/cmake")
	set(LLVMCONFIG_FILE "${LLVM_CMAKE_PATH}/LLVMConfig.cmake")
	if(EXISTS ${LLVMCONFIG_FILE})
	list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
	include(${LLVMCONFIG_FILE})
	else()
	message(FATAL_ERROR "Not found: ${LLVMCONFIG_FILE}")
	endif()

	# They are used as destination of target generators.
	set(LLVM_RUNTIME_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin)
	set(LLVM_LIBRARY_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
	if(WIN32 OR CYGWIN)
	# DLL platform -- put DLLs into bin.
	set(LLVM_SHLIB_OUTPUT_INTDIR ${LLVM_RUNTIME_OUTPUT_INTDIR})
	else()
	set(LLVM_SHLIB_OUTPUT_INTDIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
	endif()

	option(LLVM_INSTALL_TOOLCHAIN_ONLY
	"Only include toolchain files in the 'install' target." OFF)

	option(LLVM_FORCE_USE_OLD_HOST_TOOLCHAIN
	"Set to ON to force using an old, unsupported host toolchain." OFF)

	include(AddLLVM)
	include(TableGen)
	include(HandleLLVMOptions)

	set(PACKAGE_VERSION "${LLVM_PACKAGE_VERSION}")

	if (NOT DEFINED LLVM_INCLUDE_TESTS)
	set(LLVM_INCLUDE_TESTS ON)
	endif()

	include_directories("${LLVM_BINARY_DIR}/include" "${LLVM_MAIN_INCLUDE_DIR}")
	link_directories("${LLVM_LIBRARY_DIR}")

	set( CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin )
	set( CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX} )
	set( CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX} )

	if(LLVM_INCLUDE_TESTS)
	# Check prebuilt llvm/utils.
	if(EXISTS ${LLVM_TOOLS_BINARY_DIR}/FileCheck${CMAKE_EXECUTABLE_SUFFIX}
	AND EXISTS ${LLVM_TOOLS_BINARY_DIR}/count${CMAKE_EXECUTABLE_SUFFIX}
	AND EXISTS ${LLVM_TOOLS_BINARY_DIR}/not${CMAKE_EXECUTABLE_SUFFIX})
	set(LLVM_UTILS_PROVIDED ON)
	endif()

	if(EXISTS ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
	set(LLVM_LIT ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
	if(NOT LLVM_UTILS_PROVIDED)
	add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/FileCheck utils/FileCheck)
	add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/count utils/count)
	add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/not utils/not)
	set(LLVM_UTILS_PROVIDED ON)
	set(CLANG_TEST_DEPS FileCheck count not)
	endif()
	set(UNITTEST_DIR ${LLVM_MAIN_SRC_DIR}/utils/unittest)
	if(EXISTS ${UNITTEST_DIR}/googletest/include/gtest/gtest.h
	AND NOT EXISTS ${LLVM_LIBRARY_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}gtest${CMAKE_STATIC_LIBRARY_SUFFIX}
	AND EXISTS ${UNITTEST_DIR}/CMakeLists.txt)
	add_subdirectory(${UNITTEST_DIR} utils/unittest)
	endif()
	else()
	# Seek installed Lit.
	find_program(LLVM_LIT "lit.py" ${LLVM_MAIN_SRC_DIR}/utils/lit
	DOC "Path to lit.py")
	endif()

	if(LLVM_LIT)
	# Define the default arguments to use with 'lit', and an option for the user
	# to override.
	set(LIT_ARGS_DEFAULT "-sv")
	if (MSVC OR XCODE)
	set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
	endif()
	set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit")

	# On Win32 hosts, provide an option to specify the path to the GnuWin32 tools.
	if( WIN32 AND NOT CYGWIN )
	set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools")
	endif()
	else()
	set(LLVM_INCLUDE_TESTS OFF)
	endif()
	endif()

	set( CLANG_BUILT_STANDALONE 1 )
	set(BACKEND_PACKAGE_STRING "LLVM ${LLVM_PACKAGE_VERSION}")
	else()
	set(BACKEND_PACKAGE_STRING "${PACKAGE_STRING}")
	endif()

	find_package(LibXml2)
	if (LIBXML2_FOUND)
	set(CLANG_HAVE_LIBXML 1)
	endif()

	set(CLANG_RESOURCE_DIR "" CACHE STRING
	"Relative directory from the Clang binary to its resource files.")

	set(C_INCLUDE_DIRS "" CACHE STRING
	"Colon separated list of directories clang will search for headers.")

	set(GCC_INSTALL_PREFIX "" CACHE PATH "Directory where gcc is installed." )
	set(DEFAULT_SYSROOT "" CACHE PATH
	"Default <path> to all compiler invocations for --sysroot=<path>." )

	set(CLANG_VENDOR "" CACHE STRING
	"Vendor-specific text for showing with version information.")

	if( CLANG_VENDOR )
	add_definitions( -DCLANG_VENDOR="${CLANG_VENDOR} " )
	endif()

	set(CLANG_REPOSITORY_STRING "" CACHE STRING
	"Vendor-specific text for showing the repository the source is taken from.")

	if(CLANG_REPOSITORY_STRING)
	add_definitions(-DCLANG_REPOSITORY_STRING="${CLANG_REPOSITORY_STRING}")
	endif()

	set(CLANG_VENDOR_UTI "org.llvm.clang" CACHE STRING
	"Vendor-specific uti.")

	# The libdir suffix must exactly match whatever LLVM's configuration used.
	set(CLANG_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}")

	set(CLANG_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
	set(CLANG_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})

	if( CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR AND NOT MSVC_IDE )
	message(FATAL_ERROR "In-source builds are not allowed. CMake would overwrite "
	"the makefiles distributed with LLVM. Please create a directory and run cmake "
	"from there, passing the path to this source directory as the last argument. "
	"This process created the file `CMakeCache.txt' and the directory "
	"`CMakeFiles'. Please delete them.")
	endif()

	if( NOT CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR )
	file(GLOB_RECURSE
	tablegenned_files_on_include_dir
	"${CLANG_SOURCE_DIR}/include/clang/*.inc")
	if( tablegenned_files_on_include_dir )
	message(FATAL_ERROR "Apparently there is a previous in-source build, "
	"probably as the result of running `configure' and `make' on "
	"${CLANG_SOURCE_DIR}. This may cause problems. The suspicious files are:\n"
	"${tablegenned_files_on_include_dir}\nPlease clean the source directory.")
	endif()
	endif()

	# Compute the Clang version from the LLVM version.
	string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
	${PACKAGE_VERSION})
	message(STATUS "Clang version: ${CLANG_VERSION}")

	string(REGEX REPLACE "([0-9]+)\\.[0-9]+(\\.[0-9]+)?" "\\1" CLANG_VERSION_MAJOR
	${CLANG_VERSION})
	string(REGEX REPLACE "[0-9]+\\.([0-9]+)(\\.[0-9]+)?" "\\1" CLANG_VERSION_MINOR
	${CLANG_VERSION})
	if (${CLANG_VERSION} MATCHES "[0-9]+\\.[0-9]+\\.[0-9]+")
	set(CLANG_HAS_VERSION_PATCHLEVEL 1)
	string(REGEX REPLACE "[0-9]+\\.[0-9]+\\.([0-9]+)" "\\1" CLANG_VERSION_PATCHLEVEL
	${CLANG_VERSION})
	else()
	set(CLANG_HAS_VERSION_PATCHLEVEL 0)
	endif()

	# Configure the Version.inc file.
	configure_file(
	${CMAKE_CURRENT_SOURCE_DIR}/include/clang/Basic/Version.inc.in
	${CMAKE_CURRENT_BINARY_DIR}/include/clang/Basic/Version.inc)

	# Add appropriate flags for GCC
	if (LLVM_COMPILER_IS_GCC_COMPATIBLE)
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-common -Woverloaded-virtual -fno-strict-aliasing")

	# Enable -pedantic for Clang even if it's not enabled for LLVM.
	if (NOT LLVM_ENABLE_PEDANTIC)
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pedantic -Wno-long-long")
	endif ()

	check_cxx_compiler_flag("-Werror -Wnested-anon-types" CXX_SUPPORTS_NO_NESTED_ANON_TYPES_FLAG)
	if( CXX_SUPPORTS_NO_NESTED_ANON_TYPES_FLAG )
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-nested-anon-types" )
	endif()
	endif ()

	# Determine HOST_LINK_VERSION on Darwin.
	set(HOST_LINK_VERSION)
	if (APPLE)
	set(LD_V_OUTPUT)
	execute_process(
	COMMAND sh -c "${CMAKE_LINKER} -v 2>&1 \| head -1"
	RESULT_VARIABLE HAD_ERROR
	OUTPUT_VARIABLE LD_V_OUTPUT
	)
	if (NOT HAD_ERROR)
	if ("${LD_V_OUTPUT}" MATCHES ".ld64-([0-9.]+).")
	string(REGEX REPLACE ".ld64-([0-9.]+)." "\\1" HOST_LINK_VERSION ${LD_V_OUTPUT})
	elseif ("${LD_V_OUTPUT}" MATCHES "[^0-9]([0-9.]+).")
	string(REGEX REPLACE "[^0-9]([0-9.]+)." "\\1" HOST_LINK_VERSION ${LD_V_OUTPUT})
	endif()
	else()
	message(FATAL_ERROR "${CMAKE_LINKER} failed with status ${HAD_ERROR}")
	endif()
	endif()

	configure_file(
	${CLANG_SOURCE_DIR}/include/clang/Config/config.h.cmake
	${CLANG_BINARY_DIR}/include/clang/Config/config.h)

	include(CMakeParseArguments)

	function(clang_tablegen)
	# Syntax:
	# clang_tablegen output-file [tablegen-arg ...] SOURCE source-file
	# [[TARGET cmake-target-name] [DEPENDS extra-dependency ...]]
	#
	# Generates a custom command for invoking tblgen as
	#
	# tblgen source-file -o=output-file tablegen-arg ...
	#
	# and, if cmake-target-name is provided, creates a custom target for
	# executing the custom command depending on output-file. It is
	# possible to list more files to depend after DEPENDS.

	cmake_parse_arguments(CTG "" "SOURCE;TARGET" "" ${ARGN})

	if( NOT CTG_SOURCE )
	message(FATAL_ERROR "SOURCE source-file required by clang_tablegen")
	endif()

	set( LLVM_TARGET_DEFINITIONS ${CTG_SOURCE} )
	tablegen(CLANG ${CTG_UNPARSED_ARGUMENTS})

	if(CTG_TARGET)
	add_public_tablegen_target(${CTG_TARGET})
	set_target_properties( ${CTG_TARGET} PROPERTIES FOLDER "Clang tablegenning")
	set_property(GLOBAL APPEND PROPERTY CLANG_TABLEGEN_TARGETS ${CTG_TARGET})
	endif()
	endfunction(clang_tablegen)

	macro(add_clang_library name)
	cmake_parse_arguments(ARG
	""
	""
	"ADDITIONAL_HEADERS"
	${ARGN})
	set(srcs)
	if(MSVC_IDE OR XCODE)
	# Add public headers
	file(RELATIVE_PATH lib_path
	${CLANG_SOURCE_DIR}/lib/
	${CMAKE_CURRENT_SOURCE_DIR}
	)
	if(NOT lib_path MATCHES "^[.][.]")
	file( GLOB_RECURSE headers
	${CLANG_SOURCE_DIR}/include/clang/${lib_path}/*.h
	${CLANG_SOURCE_DIR}/include/clang/${lib_path}/*.def
	)
	set_source_files_properties(${headers} PROPERTIES HEADER_FILE_ONLY ON)

	file( GLOB_RECURSE tds
	${CLANG_SOURCE_DIR}/include/clang/${lib_path}/*.td
	)
	source_group("TableGen descriptions" FILES ${tds})
	set_source_files_properties(${tds}} PROPERTIES HEADER_FILE_ONLY ON)

	if(headers OR tds)
	set(srcs ${headers} ${tds})
	endif()
	endif()
	endif(MSVC_IDE OR XCODE)
	if(srcs OR ARG_ADDITIONAL_HEADERS)
	set(srcs
	ADDITIONAL_HEADERS
	${srcs}
	${ARG_ADDITIONAL_HEADERS} # It may contain unparsed unknown args.
	)
	endif()
	llvm_add_library(${name} ${ARG_UNPARSED_ARGUMENTS} ${srcs})

	if(TARGET ${name})
	target_link_libraries(${name} ${cmake_2_8_12_INTERFACE} ${LLVM_COMMON_LIBS})

	if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY OR ${name} STREQUAL "libclang")
	install(TARGETS ${name}
	LIBRARY DESTINATION lib${LLVM_LIBDIR_SUFFIX}
	ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX}
	RUNTIME DESTINATION bin)
	endif()
	set_property(GLOBAL APPEND PROPERTY CLANG_EXPORTS ${name})
	else()
	# Add empty "phony" target
	add_custom_target(${name})
	endif()

	set_target_properties(${name} PROPERTIES FOLDER "Clang libraries")
	endmacro(add_clang_library)

	macro(add_clang_executable name)
	add_llvm_executable( ${name} ${ARGN} )
	set_target_properties(${name} PROPERTIES FOLDER "Clang executables")
	endmacro(add_clang_executable)

	set(CMAKE_INCLUDE_CURRENT_DIR ON)

	include_directories(BEFORE
	${CMAKE_CURRENT_BINARY_DIR}/include
	${CMAKE_CURRENT_SOURCE_DIR}/include
	)

	if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
	install(DIRECTORY include/clang include/clang-c
	DESTINATION include
	FILES_MATCHING
	PATTERN "*.def"
	PATTERN "*.h"
	PATTERN "config.h" EXCLUDE
	PATTERN ".svn" EXCLUDE
	)

	install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/include/clang
	DESTINATION include
	FILES_MATCHING
	PATTERN "CMakeFiles" EXCLUDE
	PATTERN "*.inc"
	PATTERN "*.h"
	)
	endif()

	install(DIRECTORY include/clang-c
	DESTINATION include
	FILES_MATCHING
	PATTERN "*.h"
	PATTERN ".svn" EXCLUDE
	)

	add_definitions( -D_GNU_SOURCE )

	option(CLANG_ENABLE_ARCMT "Build ARCMT." ON)
	if (CLANG_ENABLE_ARCMT)
	set(ENABLE_CLANG_ARCMT "1")
	else()
	set(ENABLE_CLANG_ARCMT "0")
	endif()

	option(CLANG_ENABLE_STATIC_ANALYZER "Build static analyzer." ON)
	if (CLANG_ENABLE_STATIC_ANALYZER)
	set(ENABLE_CLANG_STATIC_ANALYZER "1")
	else()
	set(ENABLE_CLANG_STATIC_ANALYZER "0")
	endif()

	if (NOT CLANG_ENABLE_STATIC_ANALYZER AND CLANG_ENABLE_ARCMT)
	message(FATAL_ERROR "Cannot disable static analyzer while enabling ARCMT")
	endif()

	if(CLANG_ENABLE_ARCMT)
	add_definitions(-DCLANG_ENABLE_ARCMT)
	add_definitions(-DCLANG_ENABLE_OBJC_REWRITER)
	endif()
	if(CLANG_ENABLE_STATIC_ANALYZER)
	add_definitions(-DCLANG_ENABLE_STATIC_ANALYZER)
	endif()

	# Clang version information
	set(CLANG_EXECUTABLE_VERSION
	"${CLANG_VERSION_MAJOR}.${CLANG_VERSION_MINOR}" CACHE STRING
	"Version number that will be placed into the clang executable, in the form XX.YY")
	set(LIBCLANG_LIBRARY_VERSION
	"${CLANG_VERSION_MAJOR}.${CLANG_VERSION_MINOR}" CACHE STRING
	"Version number that will be placed into the libclang library , in the form XX.YY")
	mark_as_advanced(CLANG_EXECUTABLE_VERSION LIBCLANG_LIBRARY_VERSION)

	add_subdirectory(utils/TableGen)

	add_subdirectory(include)

	# All targets below may depend on all tablegen'd files.
	get_property(CLANG_TABLEGEN_TARGETS GLOBAL PROPERTY CLANG_TABLEGEN_TARGETS)
	list(APPEND LLVM_COMMON_DEPENDS ${CLANG_TABLEGEN_TARGETS})

	add_subdirectory(lib)
	add_subdirectory(tools)
	add_subdirectory(runtime)

	option(CLANG_BUILD_EXAMPLES "Build CLANG example programs by default." OFF)
	if (CLANG_BUILD_EXAMPLES)
	set(ENABLE_CLANG_EXAMPLES "1")
	else()
	set(ENABLE_CLANG_EXAMPLES "0")
	endif()
	add_subdirectory(examples)

	option(CLANG_INCLUDE_TESTS
	"Generate build targets for the Clang unit tests."
	${LLVM_INCLUDE_TESTS})

	if( CLANG_INCLUDE_TESTS )
	if(EXISTS ${LLVM_MAIN_SRC_DIR}/utils/unittest/googletest/include/gtest/gtest.h)
	add_subdirectory(unittests)
	list(APPEND CLANG_TEST_DEPS ClangUnitTests)
	list(APPEND CLANG_TEST_PARAMS
	clang_unit_site_config=${CMAKE_CURRENT_BINARY_DIR}/test/Unit/lit.site.cfg
	)
	endif()
	add_subdirectory(test)

	if(CLANG_BUILT_STANDALONE)
	# Add a global check rule now that all subdirectories have been traversed
	# and we know the total set of lit testsuites.
	get_property(LLVM_LIT_TESTSUITES GLOBAL PROPERTY LLVM_LIT_TESTSUITES)
	get_property(LLVM_LIT_PARAMS GLOBAL PROPERTY LLVM_LIT_PARAMS)
	get_property(LLVM_LIT_DEPENDS GLOBAL PROPERTY LLVM_LIT_DEPENDS)
	get_property(LLVM_LIT_EXTRA_ARGS GLOBAL PROPERTY LLVM_LIT_EXTRA_ARGS)
	add_lit_target(check-all
	"Running all regression tests"
	${LLVM_LIT_TESTSUITES}
	PARAMS ${LLVM_LIT_PARAMS}
	DEPENDS ${LLVM_LIT_DEPENDS}
	ARGS ${LLVM_LIT_EXTRA_ARGS}
	)
	endif()
	endif()

	option(CLANG_INCLUDE_DOCS "Generate build targets for the Clang docs."
	${LLVM_INCLUDE_DOCS})
	if( CLANG_INCLUDE_DOCS )
	add_subdirectory(docs)
	endif()

	set(CLANG_ORDER_FILE "" CACHE FILEPATH
	"Order file to use when compiling clang in order to improve startup time.")

	if (CLANG_BUILT_STANDALONE)
	# Generate a list of CMake library targets so that other CMake projects can
	# link against them. LLVM calls its version of this file LLVMExports.cmake, but
	# the usual CMake convention seems to be ${Project}Targets.cmake.
	set(CLANG_INSTALL_PACKAGE_DIR share/clang/cmake)
	set(clang_cmake_builddir "${CMAKE_BINARY_DIR}/${CLANG_INSTALL_PACKAGE_DIR}")
	get_property(CLANG_EXPORTS GLOBAL PROPERTY CLANG_EXPORTS)
	export(TARGETS ${CLANG_EXPORTS} FILE ${clang_cmake_builddir}/ClangTargets.cmake)

	# Install a <prefix>/share/clang/cmake/ClangConfig.cmake file so that
	# find_package(Clang) works. Install the target list with it.
	install(FILES
	${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules/ClangConfig.cmake
	${CLANG_BINARY_DIR}/share/clang/cmake/ClangTargets.cmake
	DESTINATION share/clang/cmake)

	# Also copy ClangConfig.cmake to the build directory so that dependent projects
	# can build against a build directory of Clang more easily.
	configure_file(
	${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules/ClangConfig.cmake
	${CLANG_BINARY_DIR}/share/clang/cmake/ClangConfig.cmake
	COPYONLY)
	endif ()