CMakeLists.txt

# Require at least version 2.8.12 of CMake
cmake_minimum_required(VERSION 2.8.12)

if(CMAKE_VERSION VERSION_EQUAL 3.0 OR CMAKE_VERSION VERSION_GREATER 3.0)
    cmake_policy(SET CMP0042 NEW)
endif()

# Set the project name
project(CoreCLR)

# Include cmake functions
include(functions.cmake)

# Set commonly used directory names
set(CLR_DIR ${CMAKE_CURRENT_SOURCE_DIR})
set(VM_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src/vm)
set(GENERATED_INCLUDE_DIR ${CMAKE_CURRENT_BINARY_DIR}/src/inc)
set(VERSION_FILE_PATH "${CMAKE_BINARY_DIR}/version.cpp")

set(CORECLR_SET_RPATH ON)
if(CORECLR_SET_RPATH)
    # Enable @rpath support for shared libraries.
    set(MACOSX_RPATH ON)
endif(CORECLR_SET_RPATH)

OPTION(CMAKE_ENABLE_CODE_COVERAGE "Enable code coverage" OFF)

# Ensure that python is present
find_program(PYTHON python)
if (PYTHON STREQUAL "PYTHON-NOTFOUND")
    message(FATAL_ERROR "PYTHON not found: Please install Python 2.7.9 or later from https://www.python.org/downloads/")
endif()

# Ensure other tools are present
if(WIN32)
    enable_language(ASM_MASM)

    # Ensure that MC is present
    find_program(MC mc)
    if (MC STREQUAL "MC-NOTFOUND")
        message(FATAL_ERROR "MC not found")
    endif()

    if(CLR_CMAKE_HOST_ARCH STREQUAL arm64)
      # CMAKE_CXX_COMPILER will default to the compiler installed with 
      # Visual studio. Overwrite it to the compiler on the path. 
      # TODO, remove when cmake generator supports Arm64 as a target.  
      find_program(PATH_CXX_COMPILER cl) 
      set(CMAKE_CXX_COMPILER ${PATH_CXX_COMPILER})  
      message("Overwriting the CMAKE_CXX_COMPILER.") 
      message(CMAKE_CXX_COMPILER found:${CMAKE_CXX_COMPILER}) 
    endif()
else()
    enable_language(ASM)

    # Ensure that awk is present
    find_program(AWK awk)
    if (AWK STREQUAL "AWK-NOTFOUND")
        message(FATAL_ERROR "AWK not found")
    endif()
 
    if (CMAKE_SYSTEM_NAME STREQUAL Darwin)

      # Ensure that dsymutil and strip is present
      find_program(DSYMUTIL dsymutil)
      if (DSYMUTIL STREQUAL "DSYMUTIL-NOTFOUND")
          message(FATAL_ERROR "dsymutil not found")
      endif()
      find_program(STRIP strip)
      if (STRIP STREQUAL "STRIP-NOTFOUND")
          message(FATAL_ERROR "strip not found")
      endif()
    elseif (CMAKE_SYSTEM_NAME STREQUAL Linux)
      # Ensure that objcopy is present
      if(DEFINED ENV{CROSSCOMPILE})
        if(CMAKE_SYSTEM_PROCESSOR STREQUAL armv7l)
          find_program(OBJCOPY ${TOOLCHAIN}-objcopy) 
        elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL aarch64)
          find_program(OBJCOPY ${TOOLCHAIN}-objcopy)
        else()
          clr_unknown_arch()
        endif()
      else()
        find_program(OBJCOPY objcopy)
      endif()
      if (OBJCOPY STREQUAL "OBJCOPY-NOTFOUND")
          message(FATAL_ERROR "objcopy not found")
      endif()
    endif ()
endif(WIN32)

#----------------------------------------
# Detect and set platform variable names
#     - for non-windows build platform & architecture is detected using inbuilt CMAKE variables
#     - for windows we use the passed in parameter to CMAKE to determine build arch
#----------------------------------------
if(CMAKE_SYSTEM_NAME STREQUAL Linux)
    set(CLR_CMAKE_PLATFORM_UNIX 1)
    # CMAKE_SYSTEM_PROCESSOR returns the value of `uname -p`.
    # For the AMD/Intel 64bit architecure two different strings are common.
    # Linux and Darwin identify it as "x86_64" while FreeBSD and netbsd uses the
    # "amd64" string. Accept either of the two here.
    if(CMAKE_SYSTEM_PROCESSOR STREQUAL x86_64 OR CMAKE_SYSTEM_PROCESSOR STREQUAL amd64)
        set(CLR_CMAKE_PLATFORM_UNIX_AMD64 1)
    elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL armv7l)
        set(CLR_CMAKE_PLATFORM_UNIX_ARM 1)
    elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL aarch64)
        set(CLR_CMAKE_PLATFORM_UNIX_ARM64 1)
    else()
        clr_unknown_arch()
    endif()
    set(CLR_CMAKE_PLATFORM_LINUX 1)
endif(CMAKE_SYSTEM_NAME STREQUAL Linux)

if(CMAKE_SYSTEM_NAME STREQUAL Darwin)
  set(CLR_CMAKE_PLATFORM_UNIX 1)
  set(CLR_CMAKE_PLATFORM_UNIX_AMD64 1)
  set(CLR_CMAKE_PLATFORM_DARWIN 1)
  if(CMAKE_VERSION VERSION_LESS "3.4.0")
    set(CMAKE_ASM_COMPILE_OBJECT "${CMAKE_C_COMPILER} <FLAGS> <DEFINES> -o <OBJECT> -c <SOURCE>")
  else()
    set(CMAKE_ASM_COMPILE_OBJECT "${CMAKE_C_COMPILER} <FLAGS> <DEFINES> <INCLUDES> -o <OBJECT> -c <SOURCE>")
  endif(CMAKE_VERSION VERSION_LESS "3.4.0")
endif(CMAKE_SYSTEM_NAME STREQUAL Darwin)

if(CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
  set(CLR_CMAKE_PLATFORM_UNIX 1)
  set(CLR_CMAKE_PLATFORM_UNIX_AMD64 1)
  set(CLR_CMAKE_PLATFORM_FREEBSD 1)
endif(CMAKE_SYSTEM_NAME STREQUAL FreeBSD)

if(CMAKE_SYSTEM_NAME STREQUAL OpenBSD)
  set(CLR_CMAKE_PLATFORM_UNIX 1)
  set(CLR_CMAKE_PLATFORM_UNIX_AMD64 1)
  set(CLR_CMAKE_PLATFORM_OPENBSD 1)
endif(CMAKE_SYSTEM_NAME STREQUAL OpenBSD)

if(CMAKE_SYSTEM_NAME STREQUAL NetBSD)
  set(CLR_CMAKE_PLATFORM_UNIX 1)
  set(CLR_CMAKE_PLATFORM_UNIX_AMD64 1)
  set(CLR_CMAKE_PLATFORM_NETBSD 1)
endif(CMAKE_SYSTEM_NAME STREQUAL NetBSD)

if(CMAKE_SYSTEM_NAME STREQUAL SunOS)
  set(CLR_CMAKE_PLATFORM_UNIX 1)
  EXECUTE_PROCESS(
    COMMAND isainfo -n
    OUTPUT_VARIABLE SUNOS_NATIVE_INSTRUCTION_SET
    )
  if(SUNOS_NATIVE_INSTRUCTION_SET MATCHES "amd64")
    set(CLR_CMAKE_PLATFORM_UNIX_AMD64 1)
    set(CMAKE_SYSTEM_PROCESSOR "amd64")
  else()
    clr_unknown_arch()
  endif()
  set(CLR_CMAKE_PLATFORM_SUNOS 1)
endif(CMAKE_SYSTEM_NAME STREQUAL SunOS)

#--------------------------------------------
# This repo builds two set of binaries
# 1. binaries which execute on target arch machine
#        - for such binaries host architecture & target architecture are same
#        - eg. coreclr.dll
# 2. binaries which execute on host machine but target another architecture
#        - host architecture is different from target architecture
#        - eg. crossgen.exe - runs on x64 machine and generates nis targeting arm64
#        - for complete list of such binaries refer to file crosscomponents.cmake
#-------------------------------------------------------------
# Set HOST architecture variables
if(CLR_CMAKE_PLATFORM_UNIX_ARM)
  set(CLR_CMAKE_PLATFORM_ARCH_ARM 1)
  set(CLR_CMAKE_HOST_ARCH "arm")
elseif(CLR_CMAKE_PLATFORM_UNIX_ARM64)
  set(CLR_CMAKE_PLATFORM_ARCH_ARM64 1) 
  set(CLR_CMAKE_HOST_ARCH "arm64")
elseif(CLR_CMAKE_PLATFORM_UNIX_AMD64)
  set(CLR_CMAKE_PLATFORM_ARCH_AMD64 1)
  set(CLR_CMAKE_HOST_ARCH "x64")
elseif(WIN32)
  # CLR_CMAKE_HOST_ARCH is passed in as param to cmake
  if (CLR_CMAKE_HOST_ARCH STREQUAL x64)
    set(CLR_CMAKE_PLATFORM_ARCH_AMD64 1)
  elseif(CLR_CMAKE_HOST_ARCH STREQUAL x86)
    set(CLR_CMAKE_PLATFORM_ARCH_I386 1)
  elseif(CLR_CMAKE_HOST_ARCH STREQUAL arm64)
    set(CLR_CMAKE_PLATFORM_ARCH_ARM64 1)
  else()
    clr_unknown_arch()
  endif()
endif()

# Set TARGET architecture variables
# Target arch will be a cmake param (optional) for both windows as well as non-windows build
# if target arch is not specified then host & target are same
if(NOT DEFINED CLR_CMAKE_TARGET_ARCH OR CLR_CMAKE_TARGET_ARCH STREQUAL "" )
  set(CLR_CMAKE_TARGET_ARCH ${CLR_CMAKE_HOST_ARCH})
endif()

# Set target architecture variables
if (CLR_CMAKE_TARGET_ARCH STREQUAL x64)
    set(CLR_CMAKE_TARGET_ARCH_AMD64 1)
  elseif(CLR_CMAKE_TARGET_ARCH STREQUAL x86)
    set(CLR_CMAKE_TARGET_ARCH_I386 1)
  elseif(CLR_CMAKE_TARGET_ARCH STREQUAL arm64)
    set(CLR_CMAKE_TARGET_ARCH_ARM64 1)
  elseif(CLR_CMAKE_TARGET_ARCH STREQUAL arm)
    set(CLR_CMAKE_TARGET_ARCH_ARM 1)
  else()
    clr_unknown_arch()
endif()

# check if host & target arch combination are valid
if(NOT(CLR_CMAKE_TARGET_ARCH STREQUAL CLR_CMAKE_HOST_ARCH))
  if(NOT((CLR_CMAKE_PLATFORM_ARCH_AMD64 AND CLR_CMAKE_TARGET_ARCH_ARM64) OR (CLR_CMAKE_PLATFORM_ARCH_I386 AND CLR_CMAKE_TARGET_ARCH_ARM)))
    message(FATAL_ERROR "Invalid host and target arch combination")
  endif()
endif()

#-----------------------------------------------------
# Initialize Cmake compiler flags and other variables
#-----------------------------------------------------

if (CMAKE_CONFIGURATION_TYPES) # multi-configuration generator?
    set(CMAKE_CONFIGURATION_TYPES "Debug;Checked;Release;RelWithDebInfo" CACHE STRING "" FORCE)
endif (CMAKE_CONFIGURATION_TYPES)

set(CMAKE_C_FLAGS_CHECKED ${CLR_C_FLAGS_CHECKED_INIT} CACHE STRING "Flags used by the compiler during checked builds.")
set(CMAKE_CXX_FLAGS_CHECKED ${CLR_CXX_FLAGS_CHECKED_INIT} CACHE STRING "Flags used by the compiler during checked builds.")
set(CMAKE_EXE_LINKER_FLAGS_CHECKED "")
set(CMAKE_SHARED_LINKER_FLAGS_CHECKED "")

# Disable the following line for UNIX altjit on Windows
set(CMAKE_CXX_STANDARD_LIBRARIES "") # do not link against standard win32 libs i.e. kernel32, uuid, user32, etc.

if (WIN32)
  # For multi-configuration toolset (as Visual Studio)
  # set the different configuration defines.
  foreach (Config DEBUG CHECKED RELEASE RELWITHDEBINFO)
    foreach (Definition IN LISTS CLR_DEFINES_${Config}_INIT)
      set_property(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS $<$<CONFIG:${Config}>:${Definition}>)
    endforeach (Definition)
  endforeach (Config)

  if(NOT CLR_CMAKE_PLATFORM_ARCH_ARM64)
    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /guard:cf")
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /guard:cf")
  endif (NOT CLR_CMAKE_PLATFORM_ARCH_ARM64)

  # Incremental linking with CFG is broken until next VS release.
  # This needs to be appended to the last for each build type to override the default flag.
  set(NO_INCREMENTAL_LINKER_FLAGS "/INCREMENTAL:NO")

  # Linker flags
  #
  # Disable the following line for UNIX altjit on Windows
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /MANIFEST:NO") #Do not create Side-by-Side Assembly Manifest
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /SUBSYSTEM:WINDOWS,6.00") #windows subsystem
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /LARGEADDRESSAWARE") # can handle addresses larger than 2 gigabytes
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /RELEASE") #sets the checksum in the header
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /NXCOMPAT") #Compatible with Data Execution Prevention
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /DYNAMICBASE") #Use address space layout randomization
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /DEBUGTYPE:cv,fixup") #debugging format
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /PDBCOMPRESS") #shrink pdb size
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /DEBUG")
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /IGNORE:4197,4013,4254,4070,4221")

  set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /IGNORE:4221")

  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /DEBUG /PDBCOMPRESS")
  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /STACK:1572864")

  # Debug build specific flags
  set(CMAKE_SHARED_LINKER_FLAGS_DEBUG "/NOVCFEATURE ${NO_INCREMENTAL_LINKER_FLAGS}")
  set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${NO_INCREMENTAL_LINKER_FLAGS}")

  # Checked build specific flags
  set(CMAKE_SHARED_LINKER_FLAGS_CHECKED "${CMAKE_SHARED_LINKER_FLAGS_CHECKED} /OPT:REF /OPT:NOICF /NOVCFEATURE ${NO_INCREMENTAL_LINKER_FLAGS}")
  set(CMAKE_STATIC_LINKER_FLAGS_CHECKED "${CMAKE_STATIC_LINKER_FLAGS_CHECKED}")
  set(CMAKE_EXE_LINKER_FLAGS_CHECKED "${CMAKE_EXE_LINKER_FLAGS_CHECKED} /OPT:REF /OPT:NOICF ${NO_INCREMENTAL_LINKER_FLAGS}")

  # Release build specific flags
  set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG /OPT:REF /OPT:ICF ${NO_INCREMENTAL_LINKER_FLAGS}")
  set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "${CMAKE_STATIC_LINKER_FLAGS_RELEASE} /LTCG")
  set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG /OPT:REF /OPT:ICF ${NO_INCREMENTAL_LINKER_FLAGS}")

  # ReleaseWithDebugInfo build specific flags
  set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO} /LTCG /OPT:REF /OPT:ICF ${NO_INCREMENTAL_LINKER_FLAGS}")
  set(CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
  set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /LTCG /OPT:REF /OPT:ICF ${NO_INCREMENTAL_LINKER_FLAGS}")

  # Temporary until cmake has VS generators for arm64
  if(CLR_CMAKE_PLATFORM_ARCH_ARM64)
    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /machine:arm64")
    set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /machine:arm64")
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /machine:arm64")
  endif(CLR_CMAKE_PLATFORM_ARCH_ARM64)

  # Force uCRT to be dynamically linked for Release build  
  set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /NODEFAULTLIB:libucrt.lib /DEFAULTLIB:ucrt.lib")  
  set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /NODEFAULTLIB:libucrt.lib /DEFAULTLIB:ucrt.lib")  
  set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO} /NODEFAULTLIB:libucrt.lib /DEFAULTLIB:ucrt.lib")  
  set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /NODEFAULTLIB:libucrt.lib /DEFAULTLIB:ucrt.lib")  

elseif (CLR_CMAKE_PLATFORM_UNIX)
  # Set the values to display when interactively configuring CMAKE_BUILD_TYPE
  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "DEBUG;CHECKED;RELEASE;RELWITHDEBINFO")

  # Use uppercase CMAKE_BUILD_TYPE for the string comparisons below
  string(TOUPPER ${CMAKE_BUILD_TYPE} UPPERCASE_CMAKE_BUILD_TYPE)

  # For single-configuration toolset
  # set the different configuration defines.
  if (UPPERCASE_CMAKE_BUILD_TYPE STREQUAL DEBUG)
    # First DEBUG
    set_property(DIRECTORY  PROPERTY COMPILE_DEFINITIONS ${CLR_DEFINES_DEBUG_INIT})
  elseif (UPPERCASE_CMAKE_BUILD_TYPE STREQUAL CHECKED)
    # Then CHECKED
    set_property(DIRECTORY PROPERTY COMPILE_DEFINITIONS ${CLR_DEFINES_CHECKED_INIT})
  elseif (UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE)
    # Then RELEASE
    set_property(DIRECTORY PROPERTY COMPILE_DEFINITIONS ${CLR_DEFINES_RELEASE_INIT})
  elseif (UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
    # And then RELWITHDEBINFO
    set_property(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS ${CLR_DEFINES_RELWITHDEBINFO_INIT})
  else ()
    message(FATAL_ERROR "Unknown build type! Set CMAKE_BUILD_TYPE to DEBUG, CHECKED, RELEASE, or RELWITHDEBINFO!")
  endif ()

  # set the CLANG sanitizer flags for debug build
  if(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL DEBUG OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL CHECKED)
    # obtain settings from running enablesanitizers.sh
    string(FIND "$ENV{DEBUG_SANITIZERS}" "asan" __ASAN_POS)
    string(FIND "$ENV{DEBUG_SANITIZERS}" "ubsan" __UBSAN_POS)
    if ((${__ASAN_POS} GREATER -1) OR (${__UBSAN_POS} GREATER -1))
      set(CLR_SANITIZE_CXX_FLAGS "${CLR_SANITIZE_CXX_FLAGS} -fsanitize-blacklist=${CMAKE_CURRENT_SOURCE_DIR}/sanitizerblacklist.txt -fsanitize=")
      set(CLR_SANITIZE_LINK_FLAGS "${CLR_SANITIZE_LINK_FLAGS} -fsanitize=")
      if (${__ASAN_POS} GREATER -1)
        set(CLR_SANITIZE_CXX_FLAGS "${CLR_SANITIZE_CXX_FLAGS}address,")
        set(CLR_SANITIZE_LINK_FLAGS "${CLR_SANITIZE_LINK_FLAGS}address,")
        message("Address Sanitizer (asan) enabled")
      endif ()
      if (${__UBSAN_POS} GREATER -1)
        # all sanitizier flags are enabled except alignment (due to heavy use of __unaligned modifier)
        set(CLR_SANITIZE_CXX_FLAGS "${CLR_SANITIZE_CXX_FLAGS}bool,bounds,enum,float-cast-overflow,float-divide-by-zero,function,integer,nonnull-attribute,null,object-size,return,returns-nonnull-attribute,shift,unreachable,vla-bound,vptr")
        set(CLR_SANITIZE_LINK_FLAGS "${CLR_SANITIZE_LINK_FLAGS}undefined")
        message("Undefined Behavior Sanitizer (ubsan) enabled")
      endif ()

      # -fdata-sections -ffunction-sections: each function has own section instead of one per .o file (needed for --gc-sections)
      # -fPIC: enable Position Independent Code normally just for shared libraries but required when linking with address sanitizer
      # -O1: optimization level used instead of -O0 to avoid compile error "invalid operand for inline asm constraint"
      set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${CLR_SANITIZE_CXX_FLAGS} -fdata-sections -ffunction-sections -fPIC -O1")
      set(CMAKE_CXX_FLAGS_CHECKED "${CMAKE_CXX_FLAGS_CHECKED} ${CLR_SANITIZE_CXX_FLAGS} -fdata-sections -ffunction-sections -fPIC -O1")

      set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} ${CLR_SANITIZE_LINK_FLAGS}")
      set(CMAKE_EXE_LINKER_FLAGS_CHECKED "${CMAKE_EXE_LINKER_FLAGS_CHECKED} ${CLR_SANITIZE_LINK_FLAGS}")

      # -Wl and --gc-sections: drop unused sections\functions (similar to Windows /Gy function-level-linking)
      set(CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG} ${CLR_SANITIZE_LINK_FLAGS} -Wl,--gc-sections")
      set(CMAKE_SHARED_LINKER_FLAGS_CHECKED "${CMAKE_SHARED_LINKER_FLAGS_CHECKED} ${CLR_SANITIZE_LINK_FLAGS} -Wl,--gc-sections")
    endif ()
  endif(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL DEBUG OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL CHECKED)
endif(WIN32)

if(CLR_CMAKE_PLATFORM_LINUX)  
  set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -Wa,--noexecstack")  
endif(CLR_CMAKE_PLATFORM_LINUX)  

#------------------------------------
# Definitions (for platform)
#-----------------------------------
if (CLR_CMAKE_PLATFORM_ARCH_AMD64)
  add_definitions(-D_AMD64_)
  add_definitions(-D_WIN64)
  add_definitions(-DAMD64)
  add_definitions(-DBIT64=1)
elseif (CLR_CMAKE_PLATFORM_ARCH_I386)
  add_definitions(-D_X86_)
elseif (CLR_CMAKE_PLATFORM_ARCH_ARM)
  add_definitions(-D_ARM_)
  add_definitions(-DARM)
elseif (CLR_CMAKE_PLATFORM_ARCH_ARM64)
  add_definitions(-D_ARM64_)
  add_definitions(-DARM64)
  add_definitions(-D_WIN64)
  add_definitions(-DBIT64=1)
else ()
  clr_unknown_arch()
endif ()

if (CLR_CMAKE_PLATFORM_UNIX)
  if(CLR_CMAKE_PLATFORM_LINUX)
    if(CLR_CMAKE_PLATFORM_UNIX_AMD64)
      message("Detected Linux x86_64")
      add_definitions(-DLINUX64)
    elseif(CLR_CMAKE_PLATFORM_UNIX_ARM)
      message("Detected Linux ARM")
      add_definitions(-DLINUX32)
    elseif(CLR_CMAKE_PLATFORM_UNIX_ARM64)
      message("Detected Linux ARM64")
      add_definitions(-DLINUX64)
    else()
      clr_unknown_arch()
    endif()
  endif(CLR_CMAKE_PLATFORM_LINUX)
endif(CLR_CMAKE_PLATFORM_UNIX)

if (CLR_CMAKE_PLATFORM_UNIX)
  add_definitions(-DPLATFORM_UNIX=1)

  if(CLR_CMAKE_PLATFORM_DARWIN)
    message("Detected OSX x86_64")
  endif(CLR_CMAKE_PLATFORM_DARWIN)

  if(CLR_CMAKE_PLATFORM_FREEBSD)
    message("Detected FreeBSD amd64")
  endif(CLR_CMAKE_PLATFORM_FREEBSD)

  if(CLR_CMAKE_PLATFORM_NETBSD)  
    message("Detected NetBSD amd64")  
  endif(CLR_CMAKE_PLATFORM_NETBSD)  
endif(CLR_CMAKE_PLATFORM_UNIX)

if (WIN32)
  # Define the CRT lib references that link into Desktop imports
  set(STATIC_MT_CRT_LIB  "libcmt$<$<OR:$<CONFIG:Debug>,$<CONFIG:Checked>>:d>.lib")
  set(STATIC_MT_VCRT_LIB  "libvcruntime$<$<OR:$<CONFIG:Debug>,$<CONFIG:Checked>>:d>.lib")
  set(STATIC_MT_CPP_LIB  "libcpmt$<$<OR:$<CONFIG:Debug>,$<CONFIG:Checked>>:d>.lib")

  # Define the uCRT lib reference
  set(STATIC_UCRT_LIB  "libucrt$<$<OR:$<CONFIG:Debug>,$<CONFIG:Checked>>:d>.lib")
  set(DYNAMIC_UCRT_LIB  "ucrt$<$<OR:$<CONFIG:Debug>,$<CONFIG:Checked>>:d>.lib")
endif(WIN32)

# Architecture specific files folder name
if (CLR_CMAKE_TARGET_ARCH_AMD64)
    set(ARCH_SOURCES_DIR amd64)
elseif (CLR_CMAKE_TARGET_ARCH_ARM64)
    set(ARCH_SOURCES_DIR arm64)
elseif (CLR_CMAKE_TARGET_ARCH_ARM)
    set(ARCH_SOURCES_DIR arm)
elseif (CLR_CMAKE_TARGET_ARCH_I386)
    set(ARCH_SOURCES_DIR i386)
else ()
    clr_unknown_arch()
endif ()

# Enable for UNIX altjit on Windows - set(CLR_CMAKE_PLATFORM_UNIX_AMD64 1)
# Enable for UNIX altjit on Windows - add_definitions(-DCLR_CMAKE_PLATFORM_UNIX=1)

#--------------------------------------
# Compile Options
#--------------------------------------
include(compileoptions.cmake)

#----------------------------------------------------
# Cross target Component build specific configuration
#----------------------------------------------------
if(CLR_CROSS_COMPONENTS_BUILD)
  include(crosscomponents.cmake)
endif(CLR_CROSS_COMPONENTS_BUILD)

#-----------------------------------------
# Add Projects
#     - project which require platform header not clr's
#     - do not depend on clr's compile definitions
#-----------------------------------------
if(CLR_CMAKE_PLATFORM_UNIX)
  add_subdirectory(src/corefx)
endif(CLR_CMAKE_PLATFORM_UNIX)

if(CLR_CMAKE_PLATFORM_UNIX)
  add_subdirectory(src/ToolBox/SOS/lldbplugin)
  if(NOT DEFINED CLR_CROSS_COMPONENTS_BUILD)
    add_subdirectory(src/pal)
  endif(NOT DEFINED CLR_CROSS_COMPONENTS_BUILD)
  add_subdirectory(src/coreclr/hosts)
  add_subdirectory(src/ildasm/unixcoreclrloader)
endif(CLR_CMAKE_PLATFORM_UNIX)

# Add this subdir. We install the headers for the jit.
add_subdirectory(src/pal/prebuilt/inc)

add_subdirectory(src/debug/debug-pal)

if(WIN32)
  add_subdirectory(src/gc/sample)
endif()

# Above projects do not build with these compile options
# All of the compiler options are specified in file compileoptions.cmake
# Do not add any new options here. They shoul be added in compileoptions.cmake
if(WIN32)
  add_compile_options(/FIWarningControl.h) # force include of WarningControl.h
  add_compile_options(/Zl) # omit default library name in .OBJ
endif(WIN32)

#-------------------------------------
# Include directory directives
#-------------------------------------
# Include the basic prebuilt headers - required for getting fileversion resource details.
include_directories("src/pal/prebuilt/inc")
include_directories("bin/obj")

if (CLR_CMAKE_PLATFORM_UNIX)
  include_directories("src/pal/inc")
  include_directories("src/pal/inc/rt")
  include_directories("src/pal/src/safecrt")
endif (CLR_CMAKE_PLATFORM_UNIX)

#--------------------------------
# Definition directives
#  - all clr specific compile definitions should be included in this file
#  - all clr specific feature variable should also be added in this file
#----------------------------------
include(clrdefinitions.cmake)

# Microsoft.Dotnet.BuildTools.Coreclr version
set(BuildToolsVersion "1.0.4-prerelease")
set(BuildToolsDir "${CLR_DIR}/packages/Microsoft.DotNet.BuildTools.CoreCLR/${BuildToolsVersion}")

#------------------------------
# Add Product Directory
#------------------------------
add_subdirectory(src)

#------------------------------
# Add Test Directory
#------------------------------
if(CLR_CMAKE_BUILD_TESTS)
  # remove some definitions for test build
  remove_definitions(-D_SECURE_SCL=0)
  remove_definitions(-DUNICODE)
  remove_definitions(-D_UNICODE)

  add_subdirectory(tests)
endif(CLR_CMAKE_BUILD_TESTS)

#----------------------------------------------------
# Build the project again for cross target components
#    - intermediates will be placed at %__IntermediatesDir%\crosscomponents
#    - final binaries will be placed at %__CMakeBinDir%\<hostArch>
#----------------------------------------------------

if(CLR_CMAKE_PLATFORM_ARCH_ARM64 AND WIN32)
  # Cross target component build only enabled for win arm64
  set(CLR_CROSS_COMPONENTS_BUILD_ENABLED 1)
endif()

# To avoid recursion when building cross target components
if(NOT DEFINED CLR_CROSS_COMPONENTS_BUILD AND CLR_CROSS_COMPONENTS_BUILD_ENABLED)

  # Set host arch for cross target components
  if(CLR_CMAKE_PLATFORM_ARCH_ARM64)
    set(CLR_CROSS_BUILD_HOST_ARCH x64)
  elseif(CLR_CMAKE_PLATFORM_ARCH_ARM)
    set(CLR_CROSS_BUILD_HOST_ARCH x86)
  endif()

  include(ExternalProject)

  # Add the source root again as external project but with CLR_CROSS_COMPONENTS_BUILD flag set
  ExternalProject_Add(
    crosscomponents
    SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}
    # Arm64 builds currently pollute the env by setting private toolset dirs. Get rid of that.
    CMAKE_COMMAND "$ENV{__VSToolsRoot}\\..\\..\\VC\\vcvarsall.bat" COMMAND cmake
    CMAKE_ARGS -DCLR_CROSS_COMPONENTS_BUILD=1
               -DCMAKE_INSTALL_PREFIX:PATH=$ENV{__CMakeBinDir}/${CLR_CROSS_BUILD_HOST_ARCH}
               -DCMAKE_USER_MAKE_RULES_OVERRIDE=${CLR_DIR}/src/pal/tools/windows-compiler-override.txt
               -DCLR_CMAKE_HOST_ARCH=${CLR_CROSS_BUILD_HOST_ARCH}
               -DCLR_CMAKE_TARGET_ARCH=${CLR_CMAKE_HOST_ARCH}
    BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/crosscomponents
    INSTALL_DIR $ENV{__CMakeBinDir}/${CLR_CROSS_BUILD_HOST_ARCH}
  )
endif()