CMakeLists.txt - platform/external/compiler-rt - Gitiles

 # CMake build for CompilerRT.
 #
 # This build assumes that CompilerRT is checked out into the
 # 'projects/compiler-rt' inside of an LLVM tree, it is not a stand-alone build
 # system.
 #
 # An important constraint of the build is that it only produces libraries
 # based on the ability of the host toolchain to target various platforms.

 include(LLVMParseArguments)

 # The CompilerRT build system requires CMake version 2.8.8 or higher in order
 # to use its support for building convenience "libraries" as a collection of
 # .o files. This is particularly useful in producing larger, more complex
 # runtime libraries.
 cmake_minimum_required(VERSION 2.8.8)

 # Compute the Clang version from the LLVM version.
 # FIXME: We should be able to reuse CLANG_VERSION variable calculated
 #        in Clang cmake files, instead of copying the rules here.
 string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
        ${PACKAGE_VERSION})
 # Setup the paths where compiler-rt runtimes and headers should be stored.
 set(LIBCLANG_INSTALL_PATH lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION})
 string(TOLOWER ${CMAKE_SYSTEM_NAME} LIBCLANG_OS_DIR)
 set(COMPILER_RT_LIBRARY_OUTPUT_DIR
   ${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/lib/${LIBCLANG_OS_DIR})
 set(COMPILER_RT_LIBRARY_INSTALL_DIR
  ${LIBCLANG_INSTALL_PATH}/lib/${LIBCLANG_OS_DIR})

 # Add path for custom modules
 set(CMAKE_MODULE_PATH
   ${CMAKE_MODULE_PATH}
   "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
   )
 include(AddCompilerRT)

 set(COMPILER_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})

 # Detect whether the current target platform is 32-bit or 64-bit, and setup
 # the correct commandline flags needed to attempt to target 32-bit and 64-bit.
 if(CMAKE_SIZEOF_VOID_P EQUAL 4 OR LLVM_BUILD_32_BITS)
   set(TARGET_64_BIT_CFLAGS "-m64")
   set(TARGET_32_BIT_CFLAGS "")
 else()
   if(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
     message(FATAL_ERROR "Please use a sane architecture with 4 or 8 byte pointers.")
   endif()
   set(TARGET_64_BIT_CFLAGS "")
   set(TARGET_32_BIT_CFLAGS "-m32")
 endif()

 # List of architectures we can target.
 set(COMPILER_RT_SUPPORTED_ARCH)

 function(get_target_flags_for_arch arch out_var)
   list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
   if(ARCH_INDEX EQUAL -1)
     message(FATAL_ERROR "Unsupported architecture: ${arch}")
   else()
     set(${out_var} ${TARGET_${arch}_CFLAGS} PARENT_SCOPE)
   endif()
 endfunction()

 # Try to compile a very simple source file to ensure we can target the given
 # platform. We use the results of these tests to build only the various target
 # runtime libraries supported by our current compilers cross-compiling
 # abilities.
 set(SIMPLE_SOURCE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple.c)
 file(WRITE ${SIMPLE_SOURCE} "#include <stdlib.h>\nint main() {}")

 # test_target_arch(<arch> <target flags...>)
 # Sets the target flags for a given architecture and determines if this
 # architecture is supported by trying to build a simple file.
 macro(test_target_arch arch)
   set(TARGET_${arch}_CFLAGS ${ARGN})
   try_compile(CAN_TARGET_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE}
               COMPILE_DEFINITIONS "${TARGET_${arch}_CFLAGS}"
               CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_${arch}_CFLAGS}")
   if(${CAN_TARGET_${arch}})
     list(APPEND COMPILER_RT_SUPPORTED_ARCH ${arch})
   endif()
 endmacro()

 if("${LLVM_NATIVE_ARCH}" STREQUAL "X86")
   test_target_arch(x86_64 ${TARGET_64_BIT_CFLAGS})
   test_target_arch(i386 ${TARGET_32_BIT_CFLAGS})
 elseif("${LLVM_NATIVE_ARCH}" STREQUAL "PowerPC")
   # Explicitly set -m flag on powerpc, because on ppc64 defaults for gcc and
   # clang are different.
   test_target_arch(powerpc64 "-m64")
   test_target_arch(powerpc "-m32")
 endif()

 # We only support running instrumented tests when we're not cross compiling
 # and target a unix-like system. On Android we define the rules for building
 # unit tests, but don't execute them.
 if("${CMAKE_HOST_SYSTEM}" STREQUAL "${CMAKE_SYSTEM}" AND UNIX AND NOT ANDROID)
   set(COMPILER_RT_CAN_EXECUTE_TESTS TRUE)
 else()
   set(COMPILER_RT_CAN_EXECUTE_TESTS FALSE)
 endif()

 function(filter_available_targets out_var)
   set(archs)
   foreach(arch ${ARGN})
     list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
     if(NOT (ARCH_INDEX EQUAL -1) AND CAN_TARGET_${arch})
       list(APPEND archs ${arch})
     endif()
   endforeach()
   set(${out_var} ${archs} PARENT_SCOPE)
 endfunction()

 # Provide some common commmandline flags for Sanitizer runtimes.
 set(SANITIZER_COMMON_CFLAGS
   -fPIC
   -fno-builtin
   -fno-exceptions
   -fomit-frame-pointer
   -funwind-tables
   -O3
   )
 if(NOT WIN32)
   list(APPEND SANITIZER_COMMON_CFLAGS -fvisibility=hidden)
 endif()
 # Build sanitizer runtimes with debug info.
 check_cxx_compiler_flag(-gline-tables-only SUPPORTS_GLINE_TABLES_ONLY_FLAG)
 if(SUPPORTS_GLINE_TABLES_ONLY_FLAG)
   list(APPEND SANITIZER_COMMON_CFLAGS -gline-tables-only)
 else()
   list(APPEND SANITIZER_COMMON_CFLAGS -g)
 endif()
 # Warnings suppressions.
 check_cxx_compiler_flag(-Wno-variadic-macros SUPPORTS_NO_VARIADIC_MACROS_FLAG)
 if(SUPPORTS_NO_VARIADIC_MACROS_FLAG)
   list(APPEND SANITIZER_COMMON_CFLAGS -Wno-variadic-macros)
 endif()
 check_cxx_compiler_flag(-Wno-c99-extensions SUPPORTS_NO_C99_EXTENSIONS_FLAG)
 if(SUPPORTS_NO_C99_EXTENSIONS_FLAG)
   list(APPEND SANITIZER_COMMON_CFLAGS -Wno-c99-extensions)
 endif()
 if(APPLE)
   list(APPEND SANITIZER_COMMON_CFLAGS -mmacosx-version-min=10.5)
 endif()

 # Architectures supported by Sanitizer runtimes. Specific sanitizers may
 # support only subset of these (e.g. TSan works on x86_64 only).
 filter_available_targets(SANITIZER_COMMON_SUPPORTED_ARCH
   x86_64 i386 powerpc64 powerpc)

 file(GLOB_RECURSE COMPILER_RT_HEADERS
   RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}/include"
   "include/*.h")

 set(output_dir ${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/include)

 if(MSVC_IDE OR XCODE)
    set(other_output_dir ${LLVM_BINARY_DIR}/bin/lib/clang/${CLANG_VERSION}/include)
 endif()

 # Copy compiler-rt headers to the build tree.
 set(out_files)
 foreach( f ${COMPILER_RT_HEADERS} )
   set( src ${CMAKE_CURRENT_SOURCE_DIR}/include/${f} )
   set( dst ${output_dir}/${f} )
   add_custom_command(OUTPUT ${dst}
     DEPENDS ${src}
     COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${dst}
     COMMENT "Copying compiler-rt's ${f}...")
   list(APPEND out_files ${dst})

   if(other_output_dir)
    set(other_dst ${other_output_dir}/${f})
     add_custom_command(OUTPUT ${other_dst}
       DEPENDS ${src}
       COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${other_dst}
       COMMENT "Copying compiler-rt's ${f}...")
     list(APPEND out_files ${other_dst})
   endif()
 endforeach( f )

 add_custom_target(compiler-rt-headers ALL DEPENDS ${out_files})

 # Install compiler-rt headers.
 install(DIRECTORY include/
   DESTINATION ${LIBCLANG_INSTALL_PATH}/include
   FILES_MATCHING
   PATTERN "*.h"
   PATTERN ".svn" EXCLUDE
   )

 # Add the public header's directory to the includes for all of compiler-rt.
 include_directories(include)

 add_subdirectory(lib)

 if(LLVM_INCLUDE_TESTS)
   # Currently the tests have not been ported to CMake, so disable this
   # directory.
   #
   #add_subdirectory(test)
 endif()
	# CMake build for CompilerRT.
	#
	# This build assumes that CompilerRT is checked out into the
	# 'projects/compiler-rt' inside of an LLVM tree, it is not a stand-alone build
	# system.
	#
	# An important constraint of the build is that it only produces libraries
	# based on the ability of the host toolchain to target various platforms.

	include(LLVMParseArguments)

	# The CompilerRT build system requires CMake version 2.8.8 or higher in order
	# to use its support for building convenience "libraries" as a collection of
	# .o files. This is particularly useful in producing larger, more complex
	# runtime libraries.
	cmake_minimum_required(VERSION 2.8.8)

	# Compute the Clang version from the LLVM version.
	# FIXME: We should be able to reuse CLANG_VERSION variable calculated
	# in Clang cmake files, instead of copying the rules here.
	string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
	${PACKAGE_VERSION})
	# Setup the paths where compiler-rt runtimes and headers should be stored.
	set(LIBCLANG_INSTALL_PATH lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION})
	string(TOLOWER ${CMAKE_SYSTEM_NAME} LIBCLANG_OS_DIR)
	set(COMPILER_RT_LIBRARY_OUTPUT_DIR
	${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/lib/${LIBCLANG_OS_DIR})
	set(COMPILER_RT_LIBRARY_INSTALL_DIR
	${LIBCLANG_INSTALL_PATH}/lib/${LIBCLANG_OS_DIR})

	# Add path for custom modules
	set(CMAKE_MODULE_PATH
	${CMAKE_MODULE_PATH}
	"${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
	)
	include(AddCompilerRT)

	set(COMPILER_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})

	# Detect whether the current target platform is 32-bit or 64-bit, and setup
	# the correct commandline flags needed to attempt to target 32-bit and 64-bit.
	if(CMAKE_SIZEOF_VOID_P EQUAL 4 OR LLVM_BUILD_32_BITS)
	set(TARGET_64_BIT_CFLAGS "-m64")
	set(TARGET_32_BIT_CFLAGS "")
	else()
	if(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
	message(FATAL_ERROR "Please use a sane architecture with 4 or 8 byte pointers.")
	endif()
	set(TARGET_64_BIT_CFLAGS "")
	set(TARGET_32_BIT_CFLAGS "-m32")
	endif()

	# List of architectures we can target.
	set(COMPILER_RT_SUPPORTED_ARCH)

	function(get_target_flags_for_arch arch out_var)
	list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
	if(ARCH_INDEX EQUAL -1)
	message(FATAL_ERROR "Unsupported architecture: ${arch}")
	else()
	set(${out_var} ${TARGET_${arch}_CFLAGS} PARENT_SCOPE)
	endif()
	endfunction()

	# Try to compile a very simple source file to ensure we can target the given
	# platform. We use the results of these tests to build only the various target
	# runtime libraries supported by our current compilers cross-compiling
	# abilities.
	set(SIMPLE_SOURCE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple.c)
	file(WRITE ${SIMPLE_SOURCE} "#include <stdlib.h>\nint main() {}")

	# test_target_arch(<arch> <target flags...>)
	# Sets the target flags for a given architecture and determines if this
	# architecture is supported by trying to build a simple file.
	macro(test_target_arch arch)
	set(TARGET_${arch}_CFLAGS ${ARGN})
	try_compile(CAN_TARGET_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE}
	COMPILE_DEFINITIONS "${TARGET_${arch}_CFLAGS}"
	CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_${arch}_CFLAGS}")
	if(${CAN_TARGET_${arch}})
	list(APPEND COMPILER_RT_SUPPORTED_ARCH ${arch})
	endif()
	endmacro()

	if("${LLVM_NATIVE_ARCH}" STREQUAL "X86")
	test_target_arch(x86_64 ${TARGET_64_BIT_CFLAGS})
	test_target_arch(i386 ${TARGET_32_BIT_CFLAGS})
	elseif("${LLVM_NATIVE_ARCH}" STREQUAL "PowerPC")
	# Explicitly set -m flag on powerpc, because on ppc64 defaults for gcc and
	# clang are different.
	test_target_arch(powerpc64 "-m64")
	test_target_arch(powerpc "-m32")
	endif()

	# We only support running instrumented tests when we're not cross compiling
	# and target a unix-like system. On Android we define the rules for building
	# unit tests, but don't execute them.
	if("${CMAKE_HOST_SYSTEM}" STREQUAL "${CMAKE_SYSTEM}" AND UNIX AND NOT ANDROID)
	set(COMPILER_RT_CAN_EXECUTE_TESTS TRUE)
	else()
	set(COMPILER_RT_CAN_EXECUTE_TESTS FALSE)
	endif()

	function(filter_available_targets out_var)
	set(archs)
	foreach(arch ${ARGN})
	list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
	if(NOT (ARCH_INDEX EQUAL -1) AND CAN_TARGET_${arch})
	list(APPEND archs ${arch})
	endif()
	endforeach()
	set(${out_var} ${archs} PARENT_SCOPE)
	endfunction()

	# Provide some common commmandline flags for Sanitizer runtimes.
	set(SANITIZER_COMMON_CFLAGS
	-fPIC
	-fno-builtin
	-fno-exceptions
	-fomit-frame-pointer
	-funwind-tables
	-O3
	)
	if(NOT WIN32)
	list(APPEND SANITIZER_COMMON_CFLAGS -fvisibility=hidden)
	endif()
	# Build sanitizer runtimes with debug info.
	check_cxx_compiler_flag(-gline-tables-only SUPPORTS_GLINE_TABLES_ONLY_FLAG)
	if(SUPPORTS_GLINE_TABLES_ONLY_FLAG)
	list(APPEND SANITIZER_COMMON_CFLAGS -gline-tables-only)
	else()
	list(APPEND SANITIZER_COMMON_CFLAGS -g)
	endif()
	# Warnings suppressions.
	check_cxx_compiler_flag(-Wno-variadic-macros SUPPORTS_NO_VARIADIC_MACROS_FLAG)
	if(SUPPORTS_NO_VARIADIC_MACROS_FLAG)
	list(APPEND SANITIZER_COMMON_CFLAGS -Wno-variadic-macros)
	endif()
	check_cxx_compiler_flag(-Wno-c99-extensions SUPPORTS_NO_C99_EXTENSIONS_FLAG)
	if(SUPPORTS_NO_C99_EXTENSIONS_FLAG)
	list(APPEND SANITIZER_COMMON_CFLAGS -Wno-c99-extensions)
	endif()
	if(APPLE)
	list(APPEND SANITIZER_COMMON_CFLAGS -mmacosx-version-min=10.5)
	endif()

	# Architectures supported by Sanitizer runtimes. Specific sanitizers may
	# support only subset of these (e.g. TSan works on x86_64 only).
	filter_available_targets(SANITIZER_COMMON_SUPPORTED_ARCH
	x86_64 i386 powerpc64 powerpc)

	file(GLOB_RECURSE COMPILER_RT_HEADERS
	RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}/include"
	"include/*.h")

	set(output_dir ${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/include)

	if(MSVC_IDE OR XCODE)
	set(other_output_dir ${LLVM_BINARY_DIR}/bin/lib/clang/${CLANG_VERSION}/include)
	endif()

	# Copy compiler-rt headers to the build tree.
	set(out_files)
	foreach( f ${COMPILER_RT_HEADERS} )
	set( src ${CMAKE_CURRENT_SOURCE_DIR}/include/${f} )
	set( dst ${output_dir}/${f} )
	add_custom_command(OUTPUT ${dst}
	DEPENDS ${src}
	COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${dst}
	COMMENT "Copying compiler-rt's ${f}...")
	list(APPEND out_files ${dst})

	if(other_output_dir)
	set(other_dst ${other_output_dir}/${f})
	add_custom_command(OUTPUT ${other_dst}
	DEPENDS ${src}
	COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${other_dst}
	COMMENT "Copying compiler-rt's ${f}...")
	list(APPEND out_files ${other_dst})
	endif()
	endforeach( f )

	add_custom_target(compiler-rt-headers ALL DEPENDS ${out_files})

	# Install compiler-rt headers.
	install(DIRECTORY include/
	DESTINATION ${LIBCLANG_INSTALL_PATH}/include
	FILES_MATCHING
	PATTERN "*.h"
	PATTERN ".svn" EXCLUDE
	)

	# Add the public header's directory to the includes for all of compiler-rt.
	include_directories(include)

	add_subdirectory(lib)

	if(LLVM_INCLUDE_TESTS)
	# Currently the tests have not been ported to CMake, so disable this
	# directory.
	#
	#add_subdirectory(test)
	endif()