third_party/llvm-project/lld/CMakeLists.txt - cobalt - Git at Google

 # Check if lld is built as a standalone project.
 if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
   project(lld)
   cmake_minimum_required(VERSION 3.4.3)

   set(CMAKE_INCLUDE_CURRENT_DIR ON)
   set(LLD_BUILT_STANDALONE TRUE)

   find_program(LLVM_CONFIG_PATH "llvm-config" DOC "Path to llvm-config binary")
   if(NOT LLVM_CONFIG_PATH)
     message(FATAL_ERROR "llvm-config not found: specify LLVM_CONFIG_PATH")
   endif()

   execute_process(COMMAND "${LLVM_CONFIG_PATH}"
                           "--obj-root"
                           "--includedir"
                           "--cmakedir"
                           "--src-root"
                   RESULT_VARIABLE HAD_ERROR
                   OUTPUT_VARIABLE LLVM_CONFIG_OUTPUT
                   OUTPUT_STRIP_TRAILING_WHITESPACE)
   if(HAD_ERROR)
     message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
   endif()

   string(REGEX REPLACE "[ \t]*[\r\n]+[ \t]*" ";" LLVM_CONFIG_OUTPUT "${LLVM_CONFIG_OUTPUT}")

   list(GET LLVM_CONFIG_OUTPUT 0 OBJ_ROOT)
   list(GET LLVM_CONFIG_OUTPUT 1 MAIN_INCLUDE_DIR)
   list(GET LLVM_CONFIG_OUTPUT 2 LLVM_CMAKE_PATH)
   list(GET LLVM_CONFIG_OUTPUT 3 MAIN_SRC_DIR)

   set(LLVM_OBJ_ROOT ${OBJ_ROOT} CACHE PATH "path to LLVM build tree")
   set(LLVM_MAIN_INCLUDE_DIR ${MAIN_INCLUDE_DIR} CACHE PATH "path to llvm/include")
   set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")

   file(TO_CMAKE_PATH ${LLVM_OBJ_ROOT} LLVM_BINARY_DIR)

   if(NOT EXISTS "${LLVM_CMAKE_PATH}/LLVMConfig.cmake")
     message(FATAL_ERROR "LLVMConfig.cmake not found")
   endif()
   include("${LLVM_CMAKE_PATH}/LLVMConfig.cmake")

   list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")

   set(PACKAGE_VERSION "${LLVM_PACKAGE_VERSION}")
   include_directories("${LLVM_BINARY_DIR}/include" ${LLVM_INCLUDE_DIRS})
   link_directories(${LLVM_LIBRARY_DIRS})

   set(LLVM_LIBRARY_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
   set(LLVM_RUNTIME_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin)
   find_program(LLVM_TABLEGEN_EXE "llvm-tblgen" ${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH)

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

   if(LLVM_INCLUDE_TESTS)
     set(Python_ADDITIONAL_VERSIONS 2.7)
     include(FindPythonInterp)
     if(NOT PYTHONINTERP_FOUND)
       message(FATAL_ERROR
 "Unable to find Python interpreter, required for testing.

 Please install Python or specify the PYTHON_EXECUTABLE CMake variable.")
     endif()

     if(${PYTHON_VERSION_STRING} VERSION_LESS 2.7)
       message(FATAL_ERROR "Python 2.7 or newer is required")
     endif()

     # Check prebuilt llvm/utils.
     if(EXISTS ${LLVM_TOOLS_BINARY_DIR}/FileCheck${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)
       # Note: path not really used, except for checking if lit was found
       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/not utils/not)
         set(LLVM_UTILS_PROVIDED ON)
         set(LLD_TEST_DEPS FileCheck 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
                    NAMES llvm-lit lit.py lit
                    PATHS "${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()
 endif()

 set(LLD_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 set(LLD_INCLUDE_DIR ${LLD_SOURCE_DIR}/include )
 set(LLD_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})

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

 string(REGEX REPLACE "([0-9]+)\\.[0-9]+(\\.[0-9]+)?" "\\1" LLD_VERSION_MAJOR
   ${LLD_VERSION})
 string(REGEX REPLACE "[0-9]+\\.([0-9]+)(\\.[0-9]+)?" "\\1" LLD_VERSION_MINOR
   ${LLD_VERSION})

 # Determine LLD revision and repository.
 # TODO: Figure out a way to get the revision and the repository on windows.
 if ( NOT CMAKE_SYSTEM_NAME MATCHES "Windows" )
   execute_process(COMMAND ${CMAKE_SOURCE_DIR}/utils/GetSourceVersion ${LLD_SOURCE_DIR}
                   OUTPUT_VARIABLE LLD_REVISION)

   execute_process(COMMAND ${CMAKE_SOURCE_DIR}/utils/GetRepositoryPath ${LLD_SOURCE_DIR}
                   OUTPUT_VARIABLE LLD_REPOSITORY)
   if ( LLD_REPOSITORY )
     # Replace newline characters with spaces
     string(REGEX REPLACE "(\r?\n)+" " " LLD_REPOSITORY ${LLD_REPOSITORY})
     # Remove leading spaces
     STRING(REGEX REPLACE "^[ \t\r\n]+" "" LLD_REPOSITORY "${LLD_REPOSITORY}" )
     # Remove trailing spaces
     string(REGEX REPLACE "(\ )+$" "" LLD_REPOSITORY ${LLD_REPOSITORY})
   endif()

   if ( LLD_REVISION )
     # Replace newline characters with spaces
     string(REGEX REPLACE "(\r?\n)+" " " LLD_REVISION ${LLD_REVISION})
     # Remove leading spaces
     STRING(REGEX REPLACE "^[ \t\r\n]+" "" LLD_REVISION "${LLD_REVISION}" )
     # Remove trailing spaces
     string(REGEX REPLACE "(\ )+$" "" LLD_REVISION ${LLD_REVISION})
   endif()
 endif ()

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


 if (CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
   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()

 list (APPEND CMAKE_MODULE_PATH "${LLD_SOURCE_DIR}/cmake/modules")

 include(AddLLD)

 option(LLD_USE_VTUNE
        "Enable VTune user task tracking."
        OFF)
 if (LLD_USE_VTUNE)
   find_package(VTune)
   if (VTUNE_FOUND)
     include_directories(${VTune_INCLUDE_DIRS})
     list(APPEND LLVM_COMMON_LIBS ${VTune_LIBRARIES})
     add_definitions(-DLLD_HAS_VTUNE)
   endif()
 endif()

 option(LLD_BUILD_TOOLS
   "Build the lld tools. If OFF, just generate build targets." ON)

 if (MSVC)
   add_definitions(-wd4530) # Suppress 'warning C4530: C++ exception handler used, but unwind semantics are not enabled.'
   add_definitions(-wd4062) # Suppress 'warning C4062: enumerator X in switch of enum Y is not handled' from system header.
 endif()

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

 if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
   install(DIRECTORY include/
     DESTINATION include
     FILES_MATCHING
     PATTERN "*.h"
     PATTERN ".svn" EXCLUDE
     )
 endif()

 add_subdirectory(Common)
 add_subdirectory(lib)
 add_subdirectory(tools/lld)

 if (LLVM_INCLUDE_TESTS)
   add_subdirectory(test)
   add_subdirectory(unittests)
 endif()

 add_subdirectory(docs)
 add_subdirectory(COFF)
 add_subdirectory(ELF)
 add_subdirectory(MinGW)
 add_subdirectory(wasm)
	# Check if lld is built as a standalone project.
	if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
	project(lld)
	cmake_minimum_required(VERSION 3.4.3)

	set(CMAKE_INCLUDE_CURRENT_DIR ON)
	set(LLD_BUILT_STANDALONE TRUE)

	find_program(LLVM_CONFIG_PATH "llvm-config" DOC "Path to llvm-config binary")
	if(NOT LLVM_CONFIG_PATH)
	message(FATAL_ERROR "llvm-config not found: specify LLVM_CONFIG_PATH")
	endif()

	execute_process(COMMAND "${LLVM_CONFIG_PATH}"
	"--obj-root"
	"--includedir"
	"--cmakedir"
	"--src-root"
	RESULT_VARIABLE HAD_ERROR
	OUTPUT_VARIABLE LLVM_CONFIG_OUTPUT
	OUTPUT_STRIP_TRAILING_WHITESPACE)
	if(HAD_ERROR)
	message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
	endif()

	string(REGEX REPLACE "[ \t][\r\n]+[ \t]" ";" LLVM_CONFIG_OUTPUT "${LLVM_CONFIG_OUTPUT}")

	list(GET LLVM_CONFIG_OUTPUT 0 OBJ_ROOT)
	list(GET LLVM_CONFIG_OUTPUT 1 MAIN_INCLUDE_DIR)
	list(GET LLVM_CONFIG_OUTPUT 2 LLVM_CMAKE_PATH)
	list(GET LLVM_CONFIG_OUTPUT 3 MAIN_SRC_DIR)

	set(LLVM_OBJ_ROOT ${OBJ_ROOT} CACHE PATH "path to LLVM build tree")
	set(LLVM_MAIN_INCLUDE_DIR ${MAIN_INCLUDE_DIR} CACHE PATH "path to llvm/include")
	set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")

	file(TO_CMAKE_PATH ${LLVM_OBJ_ROOT} LLVM_BINARY_DIR)

	if(NOT EXISTS "${LLVM_CMAKE_PATH}/LLVMConfig.cmake")
	message(FATAL_ERROR "LLVMConfig.cmake not found")
	endif()
	include("${LLVM_CMAKE_PATH}/LLVMConfig.cmake")

	list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")

	set(PACKAGE_VERSION "${LLVM_PACKAGE_VERSION}")
	include_directories("${LLVM_BINARY_DIR}/include" ${LLVM_INCLUDE_DIRS})
	link_directories(${LLVM_LIBRARY_DIRS})

	set(LLVM_LIBRARY_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
	set(LLVM_RUNTIME_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin)
	find_program(LLVM_TABLEGEN_EXE "llvm-tblgen" ${LLVM_TOOLS_BINARY_DIR} NO_DEFAULT_PATH)

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

	if(LLVM_INCLUDE_TESTS)
	set(Python_ADDITIONAL_VERSIONS 2.7)
	include(FindPythonInterp)
	if(NOT PYTHONINTERP_FOUND)
	message(FATAL_ERROR
	"Unable to find Python interpreter, required for testing.

	Please install Python or specify the PYTHON_EXECUTABLE CMake variable.")
	endif()

	if(${PYTHON_VERSION_STRING} VERSION_LESS 2.7)
	message(FATAL_ERROR "Python 2.7 or newer is required")
	endif()

	# Check prebuilt llvm/utils.
	if(EXISTS ${LLVM_TOOLS_BINARY_DIR}/FileCheck${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)
	# Note: path not really used, except for checking if lit was found
	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/not utils/not)
	set(LLVM_UTILS_PROVIDED ON)
	set(LLD_TEST_DEPS FileCheck 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
	NAMES llvm-lit lit.py lit
	PATHS "${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()
	endif()

	set(LLD_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
	set(LLD_INCLUDE_DIR ${LLD_SOURCE_DIR}/include )
	set(LLD_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})

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

	string(REGEX REPLACE "([0-9]+)\\.[0-9]+(\\.[0-9]+)?" "\\1" LLD_VERSION_MAJOR
	${LLD_VERSION})
	string(REGEX REPLACE "[0-9]+\\.([0-9]+)(\\.[0-9]+)?" "\\1" LLD_VERSION_MINOR
	${LLD_VERSION})

	# Determine LLD revision and repository.
	# TODO: Figure out a way to get the revision and the repository on windows.
	if ( NOT CMAKE_SYSTEM_NAME MATCHES "Windows" )
	execute_process(COMMAND ${CMAKE_SOURCE_DIR}/utils/GetSourceVersion ${LLD_SOURCE_DIR}
	OUTPUT_VARIABLE LLD_REVISION)

	execute_process(COMMAND ${CMAKE_SOURCE_DIR}/utils/GetRepositoryPath ${LLD_SOURCE_DIR}
	OUTPUT_VARIABLE LLD_REPOSITORY)
	if ( LLD_REPOSITORY )
	# Replace newline characters with spaces
	string(REGEX REPLACE "(\r?\n)+" " " LLD_REPOSITORY ${LLD_REPOSITORY})
	# Remove leading spaces
	STRING(REGEX REPLACE "^[ \t\r\n]+" "" LLD_REPOSITORY "${LLD_REPOSITORY}" )
	# Remove trailing spaces
	string(REGEX REPLACE "(\ )+$" "" LLD_REPOSITORY ${LLD_REPOSITORY})
	endif()

	if ( LLD_REVISION )
	# Replace newline characters with spaces
	string(REGEX REPLACE "(\r?\n)+" " " LLD_REVISION ${LLD_REVISION})
	# Remove leading spaces
	STRING(REGEX REPLACE "^[ \t\r\n]+" "" LLD_REVISION "${LLD_REVISION}" )
	# Remove trailing spaces
	string(REGEX REPLACE "(\ )+$" "" LLD_REVISION ${LLD_REVISION})
	endif()
	endif ()

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


	if (CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
	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()

	list (APPEND CMAKE_MODULE_PATH "${LLD_SOURCE_DIR}/cmake/modules")

	include(AddLLD)

	option(LLD_USE_VTUNE
	"Enable VTune user task tracking."
	OFF)
	if (LLD_USE_VTUNE)
	find_package(VTune)
	if (VTUNE_FOUND)
	include_directories(${VTune_INCLUDE_DIRS})
	list(APPEND LLVM_COMMON_LIBS ${VTune_LIBRARIES})
	add_definitions(-DLLD_HAS_VTUNE)
	endif()
	endif()

	option(LLD_BUILD_TOOLS
	"Build the lld tools. If OFF, just generate build targets." ON)

	if (MSVC)
	add_definitions(-wd4530) # Suppress 'warning C4530: C++ exception handler used, but unwind semantics are not enabled.'
	add_definitions(-wd4062) # Suppress 'warning C4062: enumerator X in switch of enum Y is not handled' from system header.
	endif()

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

	if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
	install(DIRECTORY include/
	DESTINATION include
	FILES_MATCHING
	PATTERN "*.h"
	PATTERN ".svn" EXCLUDE
	)
	endif()

	add_subdirectory(Common)
	add_subdirectory(lib)
	add_subdirectory(tools/lld)

	if (LLVM_INCLUDE_TESTS)
	add_subdirectory(test)
	add_subdirectory(unittests)
	endif()

	add_subdirectory(docs)
	add_subdirectory(COFF)
	add_subdirectory(ELF)
	add_subdirectory(MinGW)
	add_subdirectory(wasm)