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      1 include(LLVMProcessSources)
      2 include(LLVM-Config)
      3 include(DetermineGCCCompatible)
      4 
      5 function(llvm_update_compile_flags name)
      6   get_property(sources TARGET ${name} PROPERTY SOURCES)
      7   if("${sources}" MATCHES "\\.c(;|$)")
      8     set(update_src_props ON)
      9   endif()
     10 
     11   # LLVM_REQUIRES_EH is an internal flag that individual
     12   # targets can use to force EH
     13   if((LLVM_REQUIRES_EH OR LLVM_ENABLE_EH) AND NOT CLANG_CL)
     14     if(NOT (LLVM_REQUIRES_RTTI OR LLVM_ENABLE_RTTI))
     15       message(AUTHOR_WARNING "Exception handling requires RTTI. Enabling RTTI for ${name}")
     16       set(LLVM_REQUIRES_RTTI ON)
     17     endif()
     18   else()
     19     if(LLVM_COMPILER_IS_GCC_COMPATIBLE)
     20       list(APPEND LLVM_COMPILE_FLAGS "-fno-exceptions")
     21     elseif(MSVC)
     22       list(APPEND LLVM_COMPILE_DEFINITIONS _HAS_EXCEPTIONS=0)
     23       list(APPEND LLVM_COMPILE_FLAGS "/EHs-c-")
     24     endif()
     25   endif()
     26 
     27   # LLVM_REQUIRES_RTTI is an internal flag that individual
     28   # targets can use to force RTTI
     29   set(LLVM_CONFIG_HAS_RTTI YES CACHE INTERNAL "")
     30   if(NOT (LLVM_REQUIRES_RTTI OR LLVM_ENABLE_RTTI))
     31     set(LLVM_CONFIG_HAS_RTTI NO CACHE INTERNAL "")
     32     list(APPEND LLVM_COMPILE_DEFINITIONS GTEST_HAS_RTTI=0)
     33     if (LLVM_COMPILER_IS_GCC_COMPATIBLE)
     34       list(APPEND LLVM_COMPILE_FLAGS "-fno-rtti")
     35     elseif (MSVC)
     36       list(APPEND LLVM_COMPILE_FLAGS "/GR-")
     37     endif ()
     38   endif()
     39 
     40   # Assume that;
     41   #   - LLVM_COMPILE_FLAGS is list.
     42   #   - PROPERTY COMPILE_FLAGS is string.
     43   string(REPLACE ";" " " target_compile_flags " ${LLVM_COMPILE_FLAGS}")
     44 
     45   if(update_src_props)
     46     foreach(fn ${sources})
     47       get_filename_component(suf ${fn} EXT)
     48       if("${suf}" STREQUAL ".cpp")
     49         set_property(SOURCE ${fn} APPEND_STRING PROPERTY
     50           COMPILE_FLAGS "${target_compile_flags}")
     51       endif()
     52     endforeach()
     53   else()
     54     # Update target props, since all sources are C++.
     55     set_property(TARGET ${name} APPEND_STRING PROPERTY
     56       COMPILE_FLAGS "${target_compile_flags}")
     57   endif()
     58 
     59   set_property(TARGET ${name} APPEND PROPERTY COMPILE_DEFINITIONS ${LLVM_COMPILE_DEFINITIONS})
     60 endfunction()
     61 
     62 function(add_llvm_symbol_exports target_name export_file)
     63   if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
     64     set(native_export_file "${target_name}.exports")
     65     add_custom_command(OUTPUT ${native_export_file}
     66       COMMAND sed -e "s/^/_/" < ${export_file} > ${native_export_file}
     67       DEPENDS ${export_file}
     68       VERBATIM
     69       COMMENT "Creating export file for ${target_name}")
     70     set_property(TARGET ${target_name} APPEND_STRING PROPERTY
     71                  LINK_FLAGS " -Wl,-exported_symbols_list,${CMAKE_CURRENT_BINARY_DIR}/${native_export_file}")
     72   elseif(LLVM_HAVE_LINK_VERSION_SCRIPT)
     73     # Gold and BFD ld require a version script rather than a plain list.
     74     set(native_export_file "${target_name}.exports")
     75     # FIXME: Don't write the "local:" line on OpenBSD.
     76     add_custom_command(OUTPUT ${native_export_file}
     77       COMMAND echo "{" > ${native_export_file}
     78       COMMAND grep -q "[[:alnum:]]" ${export_file} && echo "  global:" >> ${native_export_file} || :
     79       COMMAND sed -e "s/$/;/" -e "s/^/    /" < ${export_file} >> ${native_export_file}
     80       COMMAND echo "  local: *;" >> ${native_export_file}
     81       COMMAND echo "};" >> ${native_export_file}
     82       DEPENDS ${export_file}
     83       VERBATIM
     84       COMMENT "Creating export file for ${target_name}")
     85     if (${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
     86       set_property(TARGET ${target_name} APPEND_STRING PROPERTY
     87                    LINK_FLAGS "  -Wl,-M,${CMAKE_CURRENT_BINARY_DIR}/${native_export_file}")
     88     else()
     89       set_property(TARGET ${target_name} APPEND_STRING PROPERTY
     90                    LINK_FLAGS "  -Wl,--version-script,${CMAKE_CURRENT_BINARY_DIR}/${native_export_file}")
     91     endif()
     92   else()
     93     set(native_export_file "${target_name}.def")
     94 
     95     add_custom_command(OUTPUT ${native_export_file}
     96       COMMAND ${PYTHON_EXECUTABLE} -c "import sys;print(''.join(['EXPORTS\\n']+sys.stdin.readlines(),))"
     97         < ${export_file} > ${native_export_file}
     98       DEPENDS ${export_file}
     99       VERBATIM
    100       COMMENT "Creating export file for ${target_name}")
    101     set(export_file_linker_flag "${CMAKE_CURRENT_BINARY_DIR}/${native_export_file}")
    102     if(MSVC)
    103       set(export_file_linker_flag "/DEF:\"${export_file_linker_flag}\"")
    104     endif()
    105     set_property(TARGET ${target_name} APPEND_STRING PROPERTY
    106                  LINK_FLAGS " ${export_file_linker_flag}")
    107   endif()
    108 
    109   add_custom_target(${target_name}_exports DEPENDS ${native_export_file})
    110   set_target_properties(${target_name}_exports PROPERTIES FOLDER "Misc")
    111 
    112   get_property(srcs TARGET ${target_name} PROPERTY SOURCES)
    113   foreach(src ${srcs})
    114     get_filename_component(extension ${src} EXT)
    115     if(extension STREQUAL ".cpp")
    116       set(first_source_file ${src})
    117       break()
    118     endif()
    119   endforeach()
    120 
    121   # Force re-linking when the exports file changes. Actually, it
    122   # forces recompilation of the source file. The LINK_DEPENDS target
    123   # property only works for makefile-based generators.
    124   # FIXME: This is not safe because this will create the same target
    125   # ${native_export_file} in several different file:
    126   # - One where we emitted ${target_name}_exports
    127   # - One where we emitted the build command for the following object.
    128   # set_property(SOURCE ${first_source_file} APPEND PROPERTY
    129   #   OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${native_export_file})
    130 
    131   set_property(DIRECTORY APPEND
    132     PROPERTY ADDITIONAL_MAKE_CLEAN_FILES ${native_export_file})
    133 
    134   add_dependencies(${target_name} ${target_name}_exports)
    135 
    136   # Add dependency to *_exports later -- CMake issue 14747
    137   list(APPEND LLVM_COMMON_DEPENDS ${target_name}_exports)
    138   set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} PARENT_SCOPE)
    139 endfunction(add_llvm_symbol_exports)
    140 
    141 if(NOT WIN32 AND NOT APPLE)
    142   execute_process(
    143     COMMAND ${CMAKE_C_COMPILER} -Wl,--version
    144     OUTPUT_VARIABLE stdout
    145     ERROR_QUIET
    146     )
    147   if("${stdout}" MATCHES "GNU gold")
    148     set(LLVM_LINKER_IS_GOLD ON)
    149   endif()
    150 endif()
    151 
    152 function(add_link_opts target_name)
    153   # Don't use linker optimizations in debug builds since it slows down the
    154   # linker in a context where the optimizations are not important.
    155   if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
    156 
    157     # Pass -O3 to the linker. This enabled different optimizations on different
    158     # linkers.
    159     if(NOT (${CMAKE_SYSTEM_NAME} MATCHES "Darwin|SunOS" OR WIN32))
    160       set_property(TARGET ${target_name} APPEND_STRING PROPERTY
    161                    LINK_FLAGS " -Wl,-O3")
    162     endif()
    163 
    164     if(LLVM_LINKER_IS_GOLD)
    165       # With gold gc-sections is always safe.
    166       set_property(TARGET ${target_name} APPEND_STRING PROPERTY
    167                    LINK_FLAGS " -Wl,--gc-sections")
    168       # Note that there is a bug with -Wl,--icf=safe so it is not safe
    169       # to enable. See https://sourceware.org/bugzilla/show_bug.cgi?id=17704.
    170     endif()
    171 
    172     if(NOT LLVM_NO_DEAD_STRIP)
    173       if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
    174         # ld64's implementation of -dead_strip breaks tools that use plugins.
    175         set_property(TARGET ${target_name} APPEND_STRING PROPERTY
    176                      LINK_FLAGS " -Wl,-dead_strip")
    177       elseif(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
    178         set_property(TARGET ${target_name} APPEND_STRING PROPERTY
    179                      LINK_FLAGS " -Wl,-z -Wl,discard-unused=sections")
    180       elseif(NOT WIN32 AND NOT LLVM_LINKER_IS_GOLD)
    181         # Object files are compiled with -ffunction-data-sections.
    182         # Versions of bfd ld < 2.23.1 have a bug in --gc-sections that breaks
    183         # tools that use plugins. Always pass --gc-sections once we require
    184         # a newer linker.
    185         set_property(TARGET ${target_name} APPEND_STRING PROPERTY
    186                      LINK_FLAGS " -Wl,--gc-sections")
    187       endif()
    188     endif()
    189   endif()
    190 endfunction(add_link_opts)
    191 
    192 # Set each output directory according to ${CMAKE_CONFIGURATION_TYPES}.
    193 # Note: Don't set variables CMAKE_*_OUTPUT_DIRECTORY any more,
    194 # or a certain builder, for eaxample, msbuild.exe, would be confused.
    195 function(set_output_directory target)
    196   cmake_parse_arguments(ARG "" "BINARY_DIR;LIBRARY_DIR" "" ${ARGN})
    197 
    198   # module_dir -- corresponding to LIBRARY_OUTPUT_DIRECTORY.
    199   # It affects output of add_library(MODULE).
    200   if(WIN32 OR CYGWIN)
    201     # DLL platform
    202     set(module_dir ${ARG_BINARY_DIR})
    203   else()
    204     set(module_dir ${ARG_LIBRARY_DIR})
    205   endif()
    206   if(NOT "${CMAKE_CFG_INTDIR}" STREQUAL ".")
    207     foreach(build_mode ${CMAKE_CONFIGURATION_TYPES})
    208       string(TOUPPER "${build_mode}" CONFIG_SUFFIX)
    209       if(ARG_BINARY_DIR)
    210         string(REPLACE ${CMAKE_CFG_INTDIR} ${build_mode} bi ${ARG_BINARY_DIR})
    211         set_target_properties(${target} PROPERTIES "RUNTIME_OUTPUT_DIRECTORY_${CONFIG_SUFFIX}" ${bi})
    212       endif()
    213       if(ARG_LIBRARY_DIR)
    214         string(REPLACE ${CMAKE_CFG_INTDIR} ${build_mode} li ${ARG_LIBRARY_DIR})
    215         set_target_properties(${target} PROPERTIES "ARCHIVE_OUTPUT_DIRECTORY_${CONFIG_SUFFIX}" ${li})
    216       endif()
    217       if(module_dir)
    218         string(REPLACE ${CMAKE_CFG_INTDIR} ${build_mode} mi ${module_dir})
    219         set_target_properties(${target} PROPERTIES "LIBRARY_OUTPUT_DIRECTORY_${CONFIG_SUFFIX}" ${mi})
    220       endif()
    221     endforeach()
    222   else()
    223     if(ARG_BINARY_DIR)
    224       set_target_properties(${target} PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${ARG_BINARY_DIR})
    225     endif()
    226     if(ARG_LIBRARY_DIR)
    227       set_target_properties(${target} PROPERTIES ARCHIVE_OUTPUT_DIRECTORY ${ARG_LIBRARY_DIR})
    228     endif()
    229     if(module_dir)
    230       set_target_properties(${target} PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${module_dir})
    231     endif()
    232   endif()
    233 endfunction()
    234 
    235 # If on Windows and building with MSVC, add the resource script containing the
    236 # VERSIONINFO data to the project.  This embeds version resource information
    237 # into the output .exe or .dll.
    238 # TODO: Enable for MinGW Windows builds too.
    239 #
    240 function(add_windows_version_resource_file OUT_VAR)
    241   set(sources ${ARGN})
    242   if (MSVC)
    243     set(resource_file ${LLVM_SOURCE_DIR}/resources/windows_version_resource.rc)
    244     if(EXISTS ${resource_file})
    245       set(sources ${sources} ${resource_file})
    246       source_group("Resource Files" ${resource_file})
    247       set(windows_resource_file ${resource_file} PARENT_SCOPE)
    248     endif()
    249   endif(MSVC)
    250 
    251   set(${OUT_VAR} ${sources} PARENT_SCOPE)
    252 endfunction(add_windows_version_resource_file)
    253 
    254 # set_windows_version_resource_properties(name resource_file...
    255 #   VERSION_MAJOR int
    256 #     Optional major version number (defaults to LLVM_VERSION_MAJOR)
    257 #   VERSION_MINOR int
    258 #     Optional minor version number (defaults to LLVM_VERSION_MINOR)
    259 #   VERSION_PATCHLEVEL int
    260 #     Optional patchlevel version number (defaults to LLVM_VERSION_PATCH)
    261 #   VERSION_STRING
    262 #     Optional version string (defaults to PACKAGE_VERSION)
    263 #   PRODUCT_NAME
    264 #     Optional product name string (defaults to "LLVM")
    265 #   )
    266 function(set_windows_version_resource_properties name resource_file)
    267   cmake_parse_arguments(ARG
    268     ""
    269     "VERSION_MAJOR;VERSION_MINOR;VERSION_PATCHLEVEL;VERSION_STRING;PRODUCT_NAME"
    270     ""
    271     ${ARGN})
    272 
    273   if (NOT DEFINED ARG_VERSION_MAJOR)
    274     set(ARG_VERSION_MAJOR ${LLVM_VERSION_MAJOR})
    275   endif()
    276 
    277   if (NOT DEFINED ARG_VERSION_MINOR)
    278     set(ARG_VERSION_MINOR ${LLVM_VERSION_MINOR})
    279   endif()
    280 
    281   if (NOT DEFINED ARG_VERSION_PATCHLEVEL)
    282     set(ARG_VERSION_PATCHLEVEL ${LLVM_VERSION_PATCH})
    283   endif()
    284 
    285   if (NOT DEFINED ARG_VERSION_STRING)
    286     set(ARG_VERSION_STRING ${PACKAGE_VERSION})
    287   endif()
    288 
    289   if (NOT DEFINED ARG_PRODUCT_NAME)
    290     set(ARG_PRODUCT_NAME "LLVM")
    291   endif()
    292 
    293   set_property(SOURCE ${resource_file}
    294                PROPERTY COMPILE_FLAGS /nologo)
    295   set_property(SOURCE ${resource_file}
    296                PROPERTY COMPILE_DEFINITIONS
    297                "RC_VERSION_FIELD_1=${ARG_VERSION_MAJOR}"
    298                "RC_VERSION_FIELD_2=${ARG_VERSION_MINOR}"
    299                "RC_VERSION_FIELD_3=${ARG_VERSION_PATCHLEVEL}"
    300                "RC_VERSION_FIELD_4=0"
    301                "RC_FILE_VERSION=\"${ARG_VERSION_STRING}\""
    302                "RC_INTERNAL_NAME=\"${name}\""
    303                "RC_PRODUCT_NAME=\"${ARG_PRODUCT_NAME}\""
    304                "RC_PRODUCT_VERSION=\"${ARG_VERSION_STRING}\"")
    305 endfunction(set_windows_version_resource_properties)
    306 
    307 # llvm_add_library(name sources...
    308 #   SHARED;STATIC
    309 #     STATIC by default w/o BUILD_SHARED_LIBS.
    310 #     SHARED by default w/  BUILD_SHARED_LIBS.
    311 #   MODULE
    312 #     Target ${name} might not be created on unsupported platforms.
    313 #     Check with "if(TARGET ${name})".
    314 #   DISABLE_LLVM_LINK_LLVM_DYLIB
    315 #     Do not link this library to libLLVM, even if
    316 #     LLVM_LINK_LLVM_DYLIB is enabled.
    317 #   OUTPUT_NAME name
    318 #     Corresponds to OUTPUT_NAME in target properties.
    319 #   DEPENDS targets...
    320 #     Same semantics as add_dependencies().
    321 #   LINK_COMPONENTS components...
    322 #     Same as the variable LLVM_LINK_COMPONENTS.
    323 #   LINK_LIBS lib_targets...
    324 #     Same semantics as target_link_libraries().
    325 #   ADDITIONAL_HEADERS
    326 #     May specify header files for IDE generators.
    327 #   SONAME
    328 #     Should set SONAME link flags and create symlinks
    329 #   )
    330 function(llvm_add_library name)
    331   cmake_parse_arguments(ARG
    332     "MODULE;SHARED;STATIC;DISABLE_LLVM_LINK_LLVM_DYLIB;SONAME"
    333     "OUTPUT_NAME"
    334     "ADDITIONAL_HEADERS;DEPENDS;LINK_COMPONENTS;LINK_LIBS;OBJLIBS"
    335     ${ARGN})
    336   list(APPEND LLVM_COMMON_DEPENDS ${ARG_DEPENDS})
    337   if(ARG_ADDITIONAL_HEADERS)
    338     # Pass through ADDITIONAL_HEADERS.
    339     set(ARG_ADDITIONAL_HEADERS ADDITIONAL_HEADERS ${ARG_ADDITIONAL_HEADERS})
    340   endif()
    341   if(ARG_OBJLIBS)
    342     set(ALL_FILES ${ARG_OBJLIBS})
    343   else()
    344     llvm_process_sources(ALL_FILES ${ARG_UNPARSED_ARGUMENTS} ${ARG_ADDITIONAL_HEADERS})
    345   endif()
    346 
    347   if(ARG_MODULE)
    348     if(ARG_SHARED OR ARG_STATIC)
    349       message(WARNING "MODULE with SHARED|STATIC doesn't make sense.")
    350     endif()
    351     if(NOT LLVM_ENABLE_PLUGINS)
    352       message(STATUS "${name} ignored -- Loadable modules not supported on this platform.")
    353       return()
    354     endif()
    355   else()
    356     if(BUILD_SHARED_LIBS AND NOT ARG_STATIC)
    357       set(ARG_SHARED TRUE)
    358     endif()
    359     if(NOT ARG_SHARED)
    360       set(ARG_STATIC TRUE)
    361     endif()
    362   endif()
    363 
    364   # Generate objlib
    365   if(ARG_SHARED AND ARG_STATIC)
    366     # Generate an obj library for both targets.
    367     set(obj_name "obj.${name}")
    368     add_library(${obj_name} OBJECT EXCLUDE_FROM_ALL
    369       ${ALL_FILES}
    370       )
    371     llvm_update_compile_flags(${obj_name})
    372     set(ALL_FILES "$<TARGET_OBJECTS:${obj_name}>")
    373 
    374     # Do add_dependencies(obj) later due to CMake issue 14747.
    375     list(APPEND objlibs ${obj_name})
    376 
    377     set_target_properties(${obj_name} PROPERTIES FOLDER "Object Libraries")
    378   endif()
    379 
    380   if(ARG_SHARED AND ARG_STATIC)
    381     # static
    382     set(name_static "${name}_static")
    383     if(ARG_OUTPUT_NAME)
    384       set(output_name OUTPUT_NAME "${ARG_OUTPUT_NAME}")
    385     endif()
    386     # DEPENDS has been appended to LLVM_COMMON_LIBS.
    387     llvm_add_library(${name_static} STATIC
    388       ${output_name}
    389       OBJLIBS ${ALL_FILES} # objlib
    390       LINK_LIBS ${ARG_LINK_LIBS}
    391       LINK_COMPONENTS ${ARG_LINK_COMPONENTS}
    392       )
    393     # FIXME: Add name_static to anywhere in TARGET ${name}'s PROPERTY.
    394     set(ARG_STATIC)
    395   endif()
    396 
    397   if(ARG_MODULE)
    398     add_library(${name} MODULE ${ALL_FILES})
    399   elseif(ARG_SHARED)
    400     add_windows_version_resource_file(ALL_FILES ${ALL_FILES})
    401     add_library(${name} SHARED ${ALL_FILES})
    402   else()
    403     add_library(${name} STATIC ${ALL_FILES})
    404   endif()
    405 
    406   if(DEFINED windows_resource_file)
    407     set_windows_version_resource_properties(${name} ${windows_resource_file})
    408     set(windows_resource_file ${windows_resource_file} PARENT_SCOPE)
    409   endif()
    410 
    411   set_output_directory(${name} BINARY_DIR ${LLVM_RUNTIME_OUTPUT_INTDIR} LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
    412   # $<TARGET_OBJECTS> doesn't require compile flags.
    413   if(NOT obj_name)
    414     llvm_update_compile_flags(${name})
    415   endif()
    416   add_link_opts( ${name} )
    417   if(ARG_OUTPUT_NAME)
    418     set_target_properties(${name}
    419       PROPERTIES
    420       OUTPUT_NAME ${ARG_OUTPUT_NAME}
    421       )
    422   endif()
    423 
    424   if(ARG_MODULE)
    425     set_target_properties(${name} PROPERTIES
    426       PREFIX ""
    427       SUFFIX ${LLVM_PLUGIN_EXT}
    428       )
    429   endif()
    430 
    431   if(ARG_SHARED)
    432     if(WIN32)
    433       set_target_properties(${name} PROPERTIES
    434         PREFIX ""
    435         )
    436     endif()
    437   endif()
    438 
    439   if(ARG_MODULE OR ARG_SHARED)
    440     # Do not add -Dname_EXPORTS to the command-line when building files in this
    441     # target. Doing so is actively harmful for the modules build because it
    442     # creates extra module variants, and not useful because we don't use these
    443     # macros.
    444     set_target_properties( ${name} PROPERTIES DEFINE_SYMBOL "" )
    445 
    446     if (LLVM_EXPORTED_SYMBOL_FILE)
    447       add_llvm_symbol_exports( ${name} ${LLVM_EXPORTED_SYMBOL_FILE} )
    448     endif()
    449   endif()
    450 
    451   if(ARG_SHARED AND UNIX)
    452     if(NOT APPLE AND ARG_SONAME)
    453       get_target_property(output_name ${name} OUTPUT_NAME)
    454       if(${output_name} STREQUAL "output_name-NOTFOUND")
    455         set(output_name ${name})
    456       endif()
    457       set(library_name ${output_name}-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}${LLVM_VERSION_SUFFIX})
    458       set(api_name ${output_name}-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}${LLVM_VERSION_SUFFIX})
    459       set_target_properties(${name} PROPERTIES OUTPUT_NAME ${library_name})
    460       llvm_install_library_symlink(${api_name} ${library_name} SHARED
    461         COMPONENT ${name}
    462         ALWAYS_GENERATE)
    463       llvm_install_library_symlink(${output_name} ${library_name} SHARED
    464         COMPONENT ${name}
    465         ALWAYS_GENERATE)
    466     endif()
    467   endif()
    468 
    469   # Add the explicit dependency information for this library.
    470   #
    471   # It would be nice to verify that we have the dependencies for this library
    472   # name, but using get_property(... SET) doesn't suffice to determine if a
    473   # property has been set to an empty value.
    474   get_property(lib_deps GLOBAL PROPERTY LLVMBUILD_LIB_DEPS_${name})
    475 
    476   if (LLVM_LINK_LLVM_DYLIB AND NOT ARG_STATIC AND NOT ARG_DISABLE_LLVM_LINK_LLVM_DYLIB)
    477     set(llvm_libs LLVM)
    478   else()
    479     llvm_map_components_to_libnames(llvm_libs
    480       ${ARG_LINK_COMPONENTS}
    481       ${LLVM_LINK_COMPONENTS}
    482       )
    483   endif()
    484 
    485   if(CMAKE_VERSION VERSION_LESS 2.8.12)
    486     # Link libs w/o keywords, assuming PUBLIC.
    487     target_link_libraries(${name}
    488       ${ARG_LINK_LIBS}
    489       ${lib_deps}
    490       ${llvm_libs}
    491       )
    492   elseif(ARG_STATIC)
    493     target_link_libraries(${name} INTERFACE
    494       ${ARG_LINK_LIBS}
    495       ${lib_deps}
    496       ${llvm_libs}
    497       )
    498   else()
    499     # We can use PRIVATE since SO knows its dependent libs.
    500     target_link_libraries(${name} PRIVATE
    501       ${ARG_LINK_LIBS}
    502       ${lib_deps}
    503       ${llvm_libs}
    504       )
    505   endif()
    506 
    507   if(LLVM_COMMON_DEPENDS)
    508     add_dependencies(${name} ${LLVM_COMMON_DEPENDS})
    509     # Add dependencies also to objlibs.
    510     # CMake issue 14747 --  add_dependencies() might be ignored to objlib's user.
    511     foreach(objlib ${objlibs})
    512       add_dependencies(${objlib} ${LLVM_COMMON_DEPENDS})
    513     endforeach()
    514   endif()
    515 
    516   if(ARG_SHARED OR ARG_MODULE)
    517     llvm_externalize_debuginfo(${name})
    518   endif()
    519 endfunction()
    520 
    521 macro(add_llvm_library name)
    522   cmake_parse_arguments(ARG
    523     "SHARED"
    524     ""
    525     ""
    526     ${ARGN})
    527   if( BUILD_SHARED_LIBS )
    528     llvm_add_library(${name} SHARED ${ARGN})
    529   else()
    530     llvm_add_library(${name} ${ARGN})
    531   endif()
    532   # The gtest libraries should not be installed or exported as a target
    533   if ("${name}" STREQUAL gtest OR "${name}" STREQUAL gtest_main)
    534     set(_is_gtest TRUE)
    535   else()
    536     set(_is_gtest FALSE)
    537     set_property( GLOBAL APPEND PROPERTY LLVM_LIBS ${name} )
    538   endif()
    539 
    540   if( EXCLUDE_FROM_ALL )
    541     set_target_properties( ${name} PROPERTIES EXCLUDE_FROM_ALL ON)
    542   elseif(NOT _is_gtest)
    543     if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY OR ${name} STREQUAL "LTO")
    544       set(install_dir lib${LLVM_LIBDIR_SUFFIX})
    545       if(ARG_SHARED OR BUILD_SHARED_LIBS)
    546         if(WIN32 OR CYGWIN OR MINGW)
    547           set(install_type RUNTIME)
    548           set(install_dir bin)
    549         else()
    550           set(install_type LIBRARY)
    551         endif()
    552       else()
    553         set(install_type ARCHIVE)
    554       endif()
    555 
    556       install(TARGETS ${name}
    557             EXPORT LLVMExports
    558             ${install_type} DESTINATION ${install_dir}
    559             COMPONENT ${name})
    560 
    561       if (NOT CMAKE_CONFIGURATION_TYPES)
    562         add_custom_target(install-${name}
    563                           DEPENDS ${name}
    564                           COMMAND "${CMAKE_COMMAND}"
    565                                   -DCMAKE_INSTALL_COMPONENT=${name}
    566                                   -P "${CMAKE_BINARY_DIR}/cmake_install.cmake")
    567       endif()
    568     endif()
    569     set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS ${name})
    570   endif()
    571   set_target_properties(${name} PROPERTIES FOLDER "Libraries")
    572 endmacro(add_llvm_library name)
    573 
    574 macro(add_llvm_loadable_module name)
    575   llvm_add_library(${name} MODULE ${ARGN})
    576   if(NOT TARGET ${name})
    577     # Add empty "phony" target
    578     add_custom_target(${name})
    579   else()
    580     if( EXCLUDE_FROM_ALL )
    581       set_target_properties( ${name} PROPERTIES EXCLUDE_FROM_ALL ON)
    582     else()
    583       if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
    584         if(WIN32 OR CYGWIN)
    585           # DLL platform
    586           set(dlldir "bin")
    587         else()
    588           set(dlldir "lib${LLVM_LIBDIR_SUFFIX}")
    589         endif()
    590         install(TARGETS ${name}
    591           EXPORT LLVMExports
    592           LIBRARY DESTINATION ${dlldir}
    593           ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX})
    594       endif()
    595       set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS ${name})
    596     endif()
    597   endif()
    598 
    599   set_target_properties(${name} PROPERTIES FOLDER "Loadable modules")
    600 endmacro(add_llvm_loadable_module name)
    601 
    602 
    603 macro(add_llvm_executable name)
    604   cmake_parse_arguments(ARG "DISABLE_LLVM_LINK_LLVM_DYLIB;IGNORE_EXTERNALIZE_DEBUGINFO" "" "" ${ARGN})
    605   llvm_process_sources( ALL_FILES ${ARG_UNPARSED_ARGUMENTS} )
    606 
    607   # Generate objlib
    608   if(LLVM_ENABLE_OBJLIB)
    609     # Generate an obj library for both targets.
    610     set(obj_name "obj.${name}")
    611     add_library(${obj_name} OBJECT EXCLUDE_FROM_ALL
    612       ${ALL_FILES}
    613       )
    614     llvm_update_compile_flags(${obj_name})
    615     set(ALL_FILES "$<TARGET_OBJECTS:${obj_name}>")
    616 
    617     set_target_properties(${obj_name} PROPERTIES FOLDER "Object Libraries")
    618   endif()
    619 
    620   add_windows_version_resource_file(ALL_FILES ${ALL_FILES})
    621 
    622   if(XCODE)
    623     # Note: the dummy.cpp source file provides no definitions. However,
    624     # it forces Xcode to properly link the static library.
    625     list(APPEND ALL_FILES "${LLVM_MAIN_SRC_DIR}/cmake/dummy.cpp")
    626   endif()
    627 
    628   if( EXCLUDE_FROM_ALL )
    629     add_executable(${name} EXCLUDE_FROM_ALL ${ALL_FILES})
    630   else()
    631     add_executable(${name} ${ALL_FILES})
    632   endif()
    633 
    634   if(DEFINED windows_resource_file)
    635     set_windows_version_resource_properties(${name} ${windows_resource_file})
    636   endif()
    637 
    638   # $<TARGET_OBJECTS> doesn't require compile flags.
    639   if(NOT LLVM_ENABLE_OBJLIB)
    640     llvm_update_compile_flags(${name})
    641   endif()
    642   add_link_opts( ${name} )
    643 
    644   # Do not add -Dname_EXPORTS to the command-line when building files in this
    645   # target. Doing so is actively harmful for the modules build because it
    646   # creates extra module variants, and not useful because we don't use these
    647   # macros.
    648   set_target_properties( ${name} PROPERTIES DEFINE_SYMBOL "" )
    649 
    650   if (LLVM_EXPORTED_SYMBOL_FILE)
    651     add_llvm_symbol_exports( ${name} ${LLVM_EXPORTED_SYMBOL_FILE} )
    652   endif(LLVM_EXPORTED_SYMBOL_FILE)
    653 
    654   if (LLVM_LINK_LLVM_DYLIB AND NOT ARG_DISABLE_LLVM_LINK_LLVM_DYLIB)
    655     set(USE_SHARED USE_SHARED)
    656   endif()
    657 
    658   set(EXCLUDE_FROM_ALL OFF)
    659   set_output_directory(${name} BINARY_DIR ${LLVM_RUNTIME_OUTPUT_INTDIR} LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
    660   llvm_config( ${name} ${USE_SHARED} ${LLVM_LINK_COMPONENTS} )
    661   if( LLVM_COMMON_DEPENDS )
    662     add_dependencies( ${name} ${LLVM_COMMON_DEPENDS} )
    663   endif( LLVM_COMMON_DEPENDS )
    664 
    665   if(NOT ARG_IGNORE_EXTERNALIZE_DEBUGINFO)
    666     llvm_externalize_debuginfo(${name})
    667   endif()
    668 endmacro(add_llvm_executable name)
    669 
    670 function(export_executable_symbols target)
    671   if (NOT MSVC) # MSVC's linker doesn't support exporting all symbols.
    672     set_target_properties(${target} PROPERTIES ENABLE_EXPORTS 1)
    673     if (APPLE)
    674       set_property(TARGET ${target} APPEND_STRING PROPERTY
    675         LINK_FLAGS " -rdynamic")
    676     endif()
    677   endif()
    678 endfunction()
    679 
    680 if(NOT LLVM_TOOLCHAIN_TOOLS)
    681   set (LLVM_TOOLCHAIN_TOOLS
    682     llvm-ar
    683     llvm-ranlib
    684     llvm-lib
    685     llvm-objdump
    686     )
    687 endif()
    688 
    689 macro(add_llvm_tool name)
    690   if( NOT LLVM_BUILD_TOOLS )
    691     set(EXCLUDE_FROM_ALL ON)
    692   endif()
    693   add_llvm_executable(${name} ${ARGN})
    694 
    695   list(FIND LLVM_TOOLCHAIN_TOOLS ${name} LLVM_IS_${name}_TOOLCHAIN_TOOL)
    696   if (LLVM_IS_${name}_TOOLCHAIN_TOOL GREATER -1 OR NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
    697     if( LLVM_BUILD_TOOLS )
    698       install(TARGETS ${name}
    699               EXPORT LLVMExports
    700               RUNTIME DESTINATION bin
    701               COMPONENT ${name})
    702 
    703       if (NOT CMAKE_CONFIGURATION_TYPES)
    704         add_custom_target(install-${name}
    705                           DEPENDS ${name}
    706                           COMMAND "${CMAKE_COMMAND}"
    707                                   -DCMAKE_INSTALL_COMPONENT=${name}
    708                                   -P "${CMAKE_BINARY_DIR}/cmake_install.cmake")
    709       endif()
    710     endif()
    711   endif()
    712   if( LLVM_BUILD_TOOLS )
    713     set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS ${name})
    714   endif()
    715   set_target_properties(${name} PROPERTIES FOLDER "Tools")
    716 endmacro(add_llvm_tool name)
    717 
    718 
    719 macro(add_llvm_example name)
    720   if( NOT LLVM_BUILD_EXAMPLES )
    721     set(EXCLUDE_FROM_ALL ON)
    722   endif()
    723   add_llvm_executable(${name} ${ARGN})
    724   if( LLVM_BUILD_EXAMPLES )
    725     install(TARGETS ${name} RUNTIME DESTINATION examples)
    726   endif()
    727   set_target_properties(${name} PROPERTIES FOLDER "Examples")
    728 endmacro(add_llvm_example name)
    729 
    730 
    731 macro(add_llvm_utility name)
    732   add_llvm_executable(${name} DISABLE_LLVM_LINK_LLVM_DYLIB ${ARGN})
    733   set_target_properties(${name} PROPERTIES FOLDER "Utils")
    734   if( LLVM_INSTALL_UTILS )
    735     install (TARGETS ${name}
    736       RUNTIME DESTINATION bin
    737       COMPONENT ${name})
    738     if (NOT CMAKE_CONFIGURATION_TYPES)
    739       add_custom_target(install-${name}
    740                         DEPENDS ${name}
    741                         COMMAND "${CMAKE_COMMAND}"
    742                                 -DCMAKE_INSTALL_COMPONENT=${name}
    743                                 -P "${CMAKE_BINARY_DIR}/cmake_install.cmake")
    744     endif()
    745   endif()
    746 endmacro(add_llvm_utility name)
    747 
    748 
    749 macro(add_llvm_target target_name)
    750   include_directories(BEFORE
    751     ${CMAKE_CURRENT_BINARY_DIR}
    752     ${CMAKE_CURRENT_SOURCE_DIR})
    753   add_llvm_library(LLVM${target_name} ${ARGN})
    754   set( CURRENT_LLVM_TARGET LLVM${target_name} )
    755 endmacro(add_llvm_target)
    756 
    757 function(canonicalize_tool_name name output)
    758   string(REPLACE "${CMAKE_CURRENT_SOURCE_DIR}/" "" nameStrip ${name})
    759   string(REPLACE "-" "_" nameUNDERSCORE ${nameStrip})
    760   string(TOUPPER ${nameUNDERSCORE} nameUPPER)
    761   set(${output} "${nameUPPER}" PARENT_SCOPE)
    762 endfunction(canonicalize_tool_name)
    763 
    764 # Custom add_subdirectory wrapper
    765 # Takes in a project name (i.e. LLVM), the the subdirectory name, and an
    766 # and an optional path if it differs from the name.
    767 macro(add_llvm_subdirectory project type name)
    768   set(add_llvm_external_dir "${ARGN}")
    769   if("${add_llvm_external_dir}" STREQUAL "")
    770     set(add_llvm_external_dir ${name})
    771   endif()
    772   canonicalize_tool_name(${name} nameUPPER)
    773   if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${add_llvm_external_dir}/CMakeLists.txt)
    774     # Treat it as in-tree subproject.
    775     option(${project}_${type}_${nameUPPER}_BUILD
    776            "Whether to build ${name} as part of ${project}" On)
    777     mark_as_advanced(${project}_${type}_${name}_BUILD)
    778     if(${project}_${type}_${nameUPPER}_BUILD)
    779       add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/${add_llvm_external_dir} ${add_llvm_external_dir})
    780       # Don't process it in add_llvm_implicit_projects().
    781       set(${project}_${type}_${nameUPPER}_BUILD OFF)
    782     endif()
    783   else()
    784     set(LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR
    785       "${LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR}"
    786       CACHE PATH "Path to ${name} source directory")
    787     set(${project}_${type}_${nameUPPER}_BUILD_DEFAULT ON)
    788     if(NOT LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR OR NOT EXISTS ${LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR})
    789       set(${project}_${type}_${nameUPPER}_BUILD_DEFAULT OFF)
    790     endif()
    791     if("${LLVM_EXTERNAL_${nameUPPER}_BUILD}" STREQUAL "OFF")
    792       set(${project}_${type}_${nameUPPER}_BUILD_DEFAULT OFF)
    793     endif()
    794     option(${project}_${type}_${nameUPPER}_BUILD
    795       "Whether to build ${name} as part of LLVM"
    796       ${${project}_${type}_${nameUPPER}_BUILD_DEFAULT})
    797     if (${project}_${type}_${nameUPPER}_BUILD)
    798       if(EXISTS ${LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR})
    799         add_subdirectory(${LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR} ${add_llvm_external_dir})
    800       elseif(NOT "${LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR}" STREQUAL "")
    801         message(WARNING "Nonexistent directory for ${name}: ${LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR}")
    802       endif()
    803       # FIXME: It'd be redundant.
    804       set(${project}_${type}_${nameUPPER}_BUILD Off)
    805     endif()
    806   endif()
    807 endmacro()
    808 
    809 # Add external project that may want to be built as part of llvm such as Clang,
    810 # lld, and Polly. This adds two options. One for the source directory of the
    811 # project, which defaults to ${CMAKE_CURRENT_SOURCE_DIR}/${name}. Another to
    812 # enable or disable building it with everything else.
    813 # Additional parameter can be specified as the name of directory.
    814 macro(add_llvm_external_project name)
    815   add_llvm_subdirectory(LLVM TOOL ${name} ${ARGN})
    816 endmacro()
    817 
    818 macro(add_llvm_tool_subdirectory name)
    819   add_llvm_external_project(${name})
    820 endmacro(add_llvm_tool_subdirectory)
    821 
    822 function(get_project_name_from_src_var var output)
    823   string(REGEX MATCH "LLVM_EXTERNAL_(.*)_SOURCE_DIR"
    824          MACHED_TOOL "${var}")
    825   if(MACHED_TOOL)
    826     set(${output} ${CMAKE_MATCH_1} PARENT_SCOPE)
    827   else()
    828     set(${output} PARENT_SCOPE)
    829   endif()
    830 endfunction()
    831 
    832 function(create_subdirectory_options project type)
    833   file(GLOB sub-dirs "${CMAKE_CURRENT_SOURCE_DIR}/*")
    834   foreach(dir ${sub-dirs})
    835     if(IS_DIRECTORY "${dir}" AND EXISTS "${dir}/CMakeLists.txt")
    836       canonicalize_tool_name(${dir} name)
    837       option(${project}_${type}_${name}_BUILD
    838            "Whether to build ${name} as part of ${project}" On)
    839       mark_as_advanced(${project}_${type}_${name}_BUILD)
    840     endif()
    841   endforeach()
    842 endfunction(create_subdirectory_options)
    843 
    844 function(create_llvm_tool_options)
    845   create_subdirectory_options(LLVM TOOL)
    846 endfunction(create_llvm_tool_options)
    847 
    848 function(add_llvm_implicit_projects)
    849   set(list_of_implicit_subdirs "")
    850   file(GLOB sub-dirs "${CMAKE_CURRENT_SOURCE_DIR}/*")
    851   foreach(dir ${sub-dirs})
    852     if(IS_DIRECTORY "${dir}" AND EXISTS "${dir}/CMakeLists.txt")
    853       canonicalize_tool_name(${dir} name)
    854       if (LLVM_TOOL_${name}_BUILD)
    855         get_filename_component(fn "${dir}" NAME)
    856         list(APPEND list_of_implicit_subdirs "${fn}")
    857       endif()
    858     endif()
    859   endforeach()
    860 
    861   foreach(external_proj ${list_of_implicit_subdirs})
    862     add_llvm_external_project("${external_proj}")
    863   endforeach()
    864 endfunction(add_llvm_implicit_projects)
    865 
    866 # Generic support for adding a unittest.
    867 function(add_unittest test_suite test_name)
    868   if( NOT LLVM_BUILD_TESTS )
    869     set(EXCLUDE_FROM_ALL ON)
    870   endif()
    871 
    872   include_directories(${LLVM_MAIN_SRC_DIR}/utils/unittest/googletest/include)
    873   if (NOT LLVM_ENABLE_THREADS)
    874     list(APPEND LLVM_COMPILE_DEFINITIONS GTEST_HAS_PTHREAD=0)
    875   endif ()
    876 
    877   if (SUPPORTS_NO_VARIADIC_MACROS_FLAG)
    878     list(APPEND LLVM_COMPILE_FLAGS "-Wno-variadic-macros")
    879   endif ()
    880 
    881   set(LLVM_REQUIRES_RTTI OFF)
    882 
    883   add_llvm_executable(${test_name} IGNORE_EXTERNALIZE_DEBUGINFO ${ARGN})
    884   set(outdir ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR})
    885   set_output_directory(${test_name} BINARY_DIR ${outdir} LIBRARY_DIR ${outdir})
    886   target_link_libraries(${test_name}
    887     gtest
    888     gtest_main
    889     LLVMSupport # gtest needs it for raw_ostream.
    890     )
    891 
    892   add_dependencies(${test_suite} ${test_name})
    893   get_target_property(test_suite_folder ${test_suite} FOLDER)
    894   if (NOT ${test_suite_folder} STREQUAL "NOTFOUND")
    895     set_property(TARGET ${test_name} PROPERTY FOLDER "${test_suite_folder}")
    896   endif ()
    897 endfunction()
    898 
    899 function(llvm_add_go_executable binary pkgpath)
    900   cmake_parse_arguments(ARG "ALL" "" "DEPENDS;GOFLAGS" ${ARGN})
    901 
    902   if(LLVM_BINDINGS MATCHES "go")
    903     # FIXME: This should depend only on the libraries Go needs.
    904     get_property(llvmlibs GLOBAL PROPERTY LLVM_LIBS)
    905     set(binpath ${CMAKE_BINARY_DIR}/bin/${binary}${CMAKE_EXECUTABLE_SUFFIX})
    906     set(cc "${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1}")
    907     set(cxx "${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1}")
    908     set(cppflags "")
    909     get_property(include_dirs DIRECTORY PROPERTY INCLUDE_DIRECTORIES)
    910     foreach(d ${include_dirs})
    911       set(cppflags "${cppflags} -I${d}")
    912     endforeach(d)
    913     set(ldflags "${CMAKE_EXE_LINKER_FLAGS}")
    914     if (LLVM_LINK_LLVM_DYLIB)
    915       set(linkmode "dylib")
    916     else()
    917       set(linkmode "component-libs")
    918     endif()
    919     add_custom_command(OUTPUT ${binpath}
    920       COMMAND ${CMAKE_BINARY_DIR}/bin/llvm-go "go=${GO_EXECUTABLE}" "cc=${cc}" "cxx=${cxx}" "cppflags=${cppflags}" "ldflags=${ldflags}" "linkmode=${linkmode}"
    921               ${ARG_GOFLAGS} build -o ${binpath} ${pkgpath}
    922       DEPENDS llvm-config ${CMAKE_BINARY_DIR}/bin/llvm-go${CMAKE_EXECUTABLE_SUFFIX}
    923               ${llvmlibs} ${ARG_DEPENDS}
    924       COMMENT "Building Go executable ${binary}"
    925       VERBATIM)
    926     if (ARG_ALL)
    927       add_custom_target(${binary} ALL DEPENDS ${binpath})
    928     else()
    929       add_custom_target(${binary} DEPENDS ${binpath})
    930     endif()
    931   endif()
    932 endfunction()
    933 
    934 # This function provides an automatic way to 'configure'-like generate a file
    935 # based on a set of common and custom variables, specifically targeting the
    936 # variables needed for the 'lit.site.cfg' files. This function bundles the
    937 # common variables that any Lit instance is likely to need, and custom
    938 # variables can be passed in.
    939 function(configure_lit_site_cfg input output)
    940   foreach(c ${LLVM_TARGETS_TO_BUILD})
    941     set(TARGETS_BUILT "${TARGETS_BUILT} ${c}")
    942   endforeach(c)
    943   set(TARGETS_TO_BUILD ${TARGETS_BUILT})
    944 
    945   set(SHLIBEXT "${LTDL_SHLIB_EXT}")
    946 
    947   # Configuration-time: See Unit/lit.site.cfg.in
    948   if (CMAKE_CFG_INTDIR STREQUAL ".")
    949     set(LLVM_BUILD_MODE ".")
    950   else ()
    951     set(LLVM_BUILD_MODE "%(build_mode)s")
    952   endif ()
    953 
    954   # They below might not be the build tree but provided binary tree.
    955   set(LLVM_SOURCE_DIR ${LLVM_MAIN_SRC_DIR})
    956   set(LLVM_BINARY_DIR ${LLVM_BINARY_DIR})
    957   string(REPLACE ${CMAKE_CFG_INTDIR} ${LLVM_BUILD_MODE} LLVM_TOOLS_DIR ${LLVM_TOOLS_BINARY_DIR})
    958   string(REPLACE ${CMAKE_CFG_INTDIR} ${LLVM_BUILD_MODE} LLVM_LIBS_DIR  ${LLVM_LIBRARY_DIR})
    959 
    960   # SHLIBDIR points the build tree.
    961   string(REPLACE ${CMAKE_CFG_INTDIR} ${LLVM_BUILD_MODE} SHLIBDIR "${LLVM_SHLIB_OUTPUT_INTDIR}")
    962 
    963   set(PYTHON_EXECUTABLE ${PYTHON_EXECUTABLE})
    964   # FIXME: "ENABLE_SHARED" doesn't make sense, since it is used just for
    965   # plugins. We may rename it.
    966   if(LLVM_ENABLE_PLUGINS)
    967     set(ENABLE_SHARED "1")
    968   else()
    969     set(ENABLE_SHARED "0")
    970   endif()
    971 
    972   if(LLVM_ENABLE_ASSERTIONS AND NOT MSVC_IDE)
    973     set(ENABLE_ASSERTIONS "1")
    974   else()
    975     set(ENABLE_ASSERTIONS "0")
    976   endif()
    977 
    978   set(HOST_OS ${CMAKE_SYSTEM_NAME})
    979   set(HOST_ARCH ${CMAKE_SYSTEM_PROCESSOR})
    980 
    981   set(HOST_CC "${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1}")
    982   set(HOST_CXX "${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1}")
    983   set(HOST_LDFLAGS "${CMAKE_EXE_LINKER_FLAGS}")
    984 
    985   configure_file(${input} ${output} @ONLY)
    986 endfunction()
    987 
    988 # A raw function to create a lit target. This is used to implement the testuite
    989 # management functions.
    990 function(add_lit_target target comment)
    991   cmake_parse_arguments(ARG "" "" "PARAMS;DEPENDS;ARGS" ${ARGN})
    992   set(LIT_ARGS "${ARG_ARGS} ${LLVM_LIT_ARGS}")
    993   separate_arguments(LIT_ARGS)
    994   if (NOT CMAKE_CFG_INTDIR STREQUAL ".")
    995     list(APPEND LIT_ARGS --param build_mode=${CMAKE_CFG_INTDIR})
    996   endif ()
    997   if (LLVM_MAIN_SRC_DIR)
    998     set (LIT_COMMAND ${PYTHON_EXECUTABLE} ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
    999   else()
   1000     find_program(LIT_COMMAND llvm-lit)
   1001   endif ()
   1002   list(APPEND LIT_COMMAND ${LIT_ARGS})
   1003   foreach(param ${ARG_PARAMS})
   1004     list(APPEND LIT_COMMAND --param ${param})
   1005   endforeach()
   1006   if (ARG_UNPARSED_ARGUMENTS)
   1007     add_custom_target(${target}
   1008       COMMAND ${LIT_COMMAND} ${ARG_UNPARSED_ARGUMENTS}
   1009       COMMENT "${comment}"
   1010       ${cmake_3_2_USES_TERMINAL}
   1011       )
   1012   else()
   1013     add_custom_target(${target}
   1014       COMMAND ${CMAKE_COMMAND} -E echo "${target} does nothing, no tools built.")
   1015     message(STATUS "${target} does nothing.")
   1016   endif()
   1017   if (ARG_DEPENDS)
   1018     add_dependencies(${target} ${ARG_DEPENDS})
   1019   endif()
   1020 
   1021   # Tests should be excluded from "Build Solution".
   1022   set_target_properties(${target} PROPERTIES EXCLUDE_FROM_DEFAULT_BUILD ON)
   1023 endfunction()
   1024 
   1025 # A function to add a set of lit test suites to be driven through 'check-*' targets.
   1026 function(add_lit_testsuite target comment)
   1027   cmake_parse_arguments(ARG "" "" "PARAMS;DEPENDS;ARGS" ${ARGN})
   1028 
   1029   # EXCLUDE_FROM_ALL excludes the test ${target} out of check-all.
   1030   if(NOT EXCLUDE_FROM_ALL)
   1031     # Register the testsuites, params and depends for the global check rule.
   1032     set_property(GLOBAL APPEND PROPERTY LLVM_LIT_TESTSUITES ${ARG_UNPARSED_ARGUMENTS})
   1033     set_property(GLOBAL APPEND PROPERTY LLVM_LIT_PARAMS ${ARG_PARAMS})
   1034     set_property(GLOBAL APPEND PROPERTY LLVM_LIT_DEPENDS ${ARG_DEPENDS})
   1035     set_property(GLOBAL APPEND PROPERTY LLVM_LIT_EXTRA_ARGS ${ARG_ARGS})
   1036   endif()
   1037 
   1038   # Produce a specific suffixed check rule.
   1039   add_lit_target(${target} ${comment}
   1040     ${ARG_UNPARSED_ARGUMENTS}
   1041     PARAMS ${ARG_PARAMS}
   1042     DEPENDS ${ARG_DEPENDS}
   1043     ARGS ${ARG_ARGS}
   1044     )
   1045 endfunction()
   1046 
   1047 function(add_lit_testsuites project directory)
   1048   if (NOT CMAKE_CONFIGURATION_TYPES)
   1049     cmake_parse_arguments(ARG "" "" "PARAMS;DEPENDS;ARGS" ${ARGN})
   1050     file(GLOB_RECURSE litCfg ${directory}/lit*.cfg)
   1051     set(lit_suites)
   1052     foreach(f ${litCfg})
   1053       get_filename_component(dir ${f} DIRECTORY)
   1054       set(lit_suites ${lit_suites} ${dir})
   1055     endforeach()
   1056     list(REMOVE_DUPLICATES lit_suites)
   1057     foreach(dir ${lit_suites})
   1058       string(REPLACE ${directory} "" name_slash ${dir})
   1059       if (name_slash)
   1060         string(REPLACE "/" "-" name_slash ${name_slash})
   1061         string(REPLACE "\\" "-" name_dashes ${name_slash})
   1062         string(TOLOWER "${project}${name_dashes}" name_var)
   1063         add_lit_target("check-${name_var}" "Running lit suite ${dir}"
   1064           ${dir}
   1065           PARAMS ${ARG_PARAMS}
   1066           DEPENDS ${ARG_DEPENDS}
   1067           ARGS ${ARG_ARGS}
   1068         )
   1069       endif()
   1070     endforeach()
   1071   endif()
   1072 endfunction()
   1073 
   1074 function(llvm_install_library_symlink name dest type)
   1075   cmake_parse_arguments(ARG "ALWAYS_GENERATE" "COMPONENT" "" ${ARGN})
   1076   foreach(path ${CMAKE_MODULE_PATH})
   1077     if(EXISTS ${path}/LLVMInstallSymlink.cmake)
   1078       set(INSTALL_SYMLINK ${path}/LLVMInstallSymlink.cmake)
   1079       break()
   1080     endif()
   1081   endforeach()
   1082 
   1083   set(component ${ARG_COMPONENT})
   1084   if(NOT component)
   1085     set(component ${name})
   1086   endif()
   1087 
   1088   set(full_name ${CMAKE_${type}_LIBRARY_PREFIX}${name}${CMAKE_${type}_LIBRARY_SUFFIX})
   1089   set(full_dest ${CMAKE_${type}_LIBRARY_PREFIX}${dest}${CMAKE_${type}_LIBRARY_SUFFIX})
   1090 
   1091   set(output_dir lib${LLVM_LIBDIR_SUFFIX})
   1092   if(WIN32 AND "${type}" STREQUAL "SHARED")
   1093     set(output_dir bin)
   1094   endif()
   1095 
   1096   install(SCRIPT ${INSTALL_SYMLINK}
   1097           CODE "install_symlink(${full_name} ${full_dest} ${output_dir})"
   1098           COMPONENT ${component})
   1099 
   1100   if (NOT CMAKE_CONFIGURATION_TYPES AND NOT ARG_ALWAYS_GENERATE)
   1101     add_custom_target(install-${name}
   1102                       DEPENDS ${name} ${dest} install-${dest}
   1103                       COMMAND "${CMAKE_COMMAND}"
   1104                               -DCMAKE_INSTALL_COMPONENT=${name}
   1105                               -P "${CMAKE_BINARY_DIR}/cmake_install.cmake")
   1106   endif()
   1107 endfunction()
   1108 
   1109 function(llvm_install_symlink name dest)
   1110   cmake_parse_arguments(ARG "ALWAYS_GENERATE" "" "" ${ARGN})
   1111   foreach(path ${CMAKE_MODULE_PATH})
   1112     if(EXISTS ${path}/LLVMInstallSymlink.cmake)
   1113       set(INSTALL_SYMLINK ${path}/LLVMInstallSymlink.cmake)
   1114       break()
   1115     endif()
   1116   endforeach()
   1117 
   1118   if(ARG_ALWAYS_GENERATE)
   1119     set(component ${dest})
   1120   else()
   1121     set(component ${name})
   1122   endif()
   1123 
   1124   set(full_name ${name}${CMAKE_EXECUTABLE_SUFFIX})
   1125   set(full_dest ${dest}${CMAKE_EXECUTABLE_SUFFIX})
   1126 
   1127   install(SCRIPT ${INSTALL_SYMLINK}
   1128           CODE "install_symlink(${full_name} ${full_dest} bin)"
   1129           COMPONENT ${component})
   1130 
   1131   if (NOT CMAKE_CONFIGURATION_TYPES AND NOT ARG_ALWAYS_GENERATE)
   1132     add_custom_target(install-${name}
   1133                       DEPENDS ${name} ${dest} install-${dest}
   1134                       COMMAND "${CMAKE_COMMAND}"
   1135                               -DCMAKE_INSTALL_COMPONENT=${name}
   1136                               -P "${CMAKE_BINARY_DIR}/cmake_install.cmake")
   1137   endif()
   1138 endfunction()
   1139 
   1140 function(add_llvm_tool_symlink name dest)
   1141   cmake_parse_arguments(ARG "ALWAYS_GENERATE" "" "" ${ARGN})
   1142   if(UNIX)
   1143     set(LLVM_LINK_OR_COPY create_symlink)
   1144     set(dest_binary "${dest}${CMAKE_EXECUTABLE_SUFFIX}")
   1145   else()
   1146     set(LLVM_LINK_OR_COPY copy)
   1147     set(dest_binary "${LLVM_RUNTIME_OUTPUT_INTDIR}/${dest}${CMAKE_EXECUTABLE_SUFFIX}")
   1148   endif()
   1149 
   1150   set(output_path "${LLVM_RUNTIME_OUTPUT_INTDIR}/${name}${CMAKE_EXECUTABLE_SUFFIX}")
   1151 
   1152   if(ARG_ALWAYS_GENERATE)
   1153     set_property(DIRECTORY APPEND PROPERTY
   1154       ADDITIONAL_MAKE_CLEAN_FILES ${dest_binary})
   1155     add_custom_command(TARGET ${dest} POST_BUILD
   1156       COMMAND ${CMAKE_COMMAND} -E ${LLVM_LINK_OR_COPY} "${dest_binary}" "${output_path}")
   1157   else()
   1158     add_custom_command(OUTPUT ${output_path}
   1159                      COMMAND ${CMAKE_COMMAND} -E ${LLVM_LINK_OR_COPY} "${dest_binary}" "${output_path}"
   1160                      DEPENDS ${dest})
   1161     add_custom_target(${name} ALL DEPENDS ${output_path})
   1162     set_target_properties(${name} PROPERTIES FOLDER Tools)
   1163 
   1164     # Make sure the parent tool is a toolchain tool, otherwise exclude this tool
   1165     list(FIND LLVM_TOOLCHAIN_TOOLS ${dest} LLVM_IS_${dest}_TOOLCHAIN_TOOL)
   1166     if (NOT LLVM_IS_${dest}_TOOLCHAIN_TOOL GREATER -1)
   1167       set(LLVM_IS_${name}_TOOLCHAIN_TOOL ${LLVM_IS_${dest}_TOOLCHAIN_TOOL})
   1168     else()
   1169       list(FIND LLVM_TOOLCHAIN_TOOLS ${name} LLVM_IS_${name}_TOOLCHAIN_TOOL)
   1170     endif()
   1171 
   1172     # LLVM_IS_${name}_TOOLCHAIN_TOOL will only be greater than -1 if both this
   1173     # tool and its parent tool are in LLVM_TOOLCHAIN_TOOLS
   1174     if (LLVM_IS_${name}_TOOLCHAIN_TOOL GREATER -1 OR NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
   1175       if( LLVM_BUILD_TOOLS )
   1176         llvm_install_symlink(${name} ${dest})
   1177       endif()
   1178     endif()
   1179   endif()
   1180 endfunction()
   1181 
   1182 function(llvm_externalize_debuginfo name)
   1183   if(NOT LLVM_EXTERNALIZE_DEBUGINFO)
   1184     return()
   1185   endif()
   1186 
   1187   if(APPLE)
   1188     if(CMAKE_CXX_FLAGS MATCHES "-flto"
   1189       OR CMAKE_CXX_FLAGS_${uppercase_CMAKE_BUILD_TYPE} MATCHES "-flto")
   1190 
   1191       set(lto_object ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/${name}-lto.o)
   1192       set_property(TARGET ${name} APPEND_STRING PROPERTY
   1193         LINK_FLAGS " -Wl,-object_path_lto,${lto_object}")
   1194     endif()
   1195     add_custom_command(TARGET ${name} POST_BUILD
   1196       COMMAND xcrun dsymutil $<TARGET_FILE:${name}>
   1197       COMMAND xcrun strip -Sl $<TARGET_FILE:${name}>)
   1198   else()
   1199     message(FATAL_ERROR "LLVM_EXTERNALIZE_DEBUGINFO isn't implemented for non-darwin platforms!")
   1200   endif()
   1201 endfunction()
   1202