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)

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

 set(COMPILER_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})

 # FIXME: Below we assume that the target build of LLVM/Clang is x86, which is
 # not at all valid. Much of this can be fixed just by switching to use
 # a just-built-clang binary for the compiles.

 # 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_X86_64_CFLAGS "-m64")
   set(TARGET_I386_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_X86_64_CFLAGS "")
   set(TARGET_I386_CFLAGS "-m32")
 endif()

 function(get_target_flags_for_arch arch out_var)
   if(${arch} STREQUAL "x86_64")
     set(${out_var} ${TARGET_X86_64_CFLAGS} PARENT_SCOPE)
   elseif(${arch} STREQUAL "i386")
     set(${out_var} ${TARGET_I386_CFLAGS} PARENT_SCOPE)
   else()
     message(FATAL_ERROR "Unsupported architecture: ${arch}")
   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_SOURCE64 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple64.c)
 file(WRITE ${SIMPLE_SOURCE64} "#include <stdlib.h>\nint main() {}")
 try_compile(CAN_TARGET_X86_64 ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE64}
             COMPILE_DEFINITIONS "${TARGET_X86_64_CFLAGS}"
             CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_X86_64_CFLAGS}")

 set(SIMPLE_SOURCE32 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple32.c)
 file(WRITE ${SIMPLE_SOURCE32} "#include <stdlib.h>\nint main() {}")
 try_compile(CAN_TARGET_I386 ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE32}
             COMPILE_DEFINITIONS "${TARGET_I386_CFLAGS}"
             CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_I386_CFLAGS}")

 # 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 ${ARGN})
     if(${arch} STREQUAL "x86_64" AND CAN_TARGET_X86_64)
       list(APPEND archs ${arch})
     elseif (${arch} STREQUAL "i386" AND CAN_TARGET_I386)
       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()

 # Because compiler-rt spends a lot of time setting up custom compile flags,
 # define a handy helper function for it. The compile flags setting in CMake
 # has serious issues that make its syntax challenging at best.
 function(set_target_compile_flags target)
   foreach(arg ${ARGN})
     set(argstring "${argstring} ${arg}")
   endforeach()
   set_property(TARGET ${target} PROPERTY COMPILE_FLAGS "${argstring}")
 endfunction()

 function(set_target_link_flags target)
   foreach(arg ${ARGN})
     set(argstring "${argstring} ${arg}")
   endforeach()
   set_property(TARGET ${target} PROPERTY LINK_FLAGS "${argstring}")
 endfunction()

 # 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)

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

 # Call add_clang_compiler_rt_libraries to make sure that targets are built
 # and installed in the directories where Clang driver expects to find them.
 macro(add_clang_compiler_rt_libraries)
   # Setup output directories so that clang in build tree works.
   set_target_properties(${ARGN} PROPERTIES
     ARCHIVE_OUTPUT_DIRECTORY
       ${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/lib/${LIBCLANG_OS_DIR}
     LIBRARY_OUTPUT_DIRECTORY
       ${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/lib/${LIBCLANG_OS_DIR}
     )
   # Add installation command.
   install(TARGETS ${ARGN}
     ARCHIVE DESTINATION ${LIBCLANG_INSTALL_PATH}/lib/${LIBCLANG_OS_DIR}
     LIBRARY DESTINATION ${LIBCLANG_INSTALL_PATH}/lib/${LIBCLANG_OS_DIR}
     )
 endmacro(add_clang_compiler_rt_libraries)

 # 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)

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

	set(COMPILER_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})

	# FIXME: Below we assume that the target build of LLVM/Clang is x86, which is
	# not at all valid. Much of this can be fixed just by switching to use
	# a just-built-clang binary for the compiles.

	# 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_X86_64_CFLAGS "-m64")
	set(TARGET_I386_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_X86_64_CFLAGS "")
	set(TARGET_I386_CFLAGS "-m32")
	endif()

	function(get_target_flags_for_arch arch out_var)
	if(${arch} STREQUAL "x86_64")
	set(${out_var} ${TARGET_X86_64_CFLAGS} PARENT_SCOPE)
	elseif(${arch} STREQUAL "i386")
	set(${out_var} ${TARGET_I386_CFLAGS} PARENT_SCOPE)
	else()
	message(FATAL_ERROR "Unsupported architecture: ${arch}")
	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_SOURCE64 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple64.c)
	file(WRITE ${SIMPLE_SOURCE64} "#include <stdlib.h>\nint main() {}")
	try_compile(CAN_TARGET_X86_64 ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE64}
	COMPILE_DEFINITIONS "${TARGET_X86_64_CFLAGS}"
	CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_X86_64_CFLAGS}")

	set(SIMPLE_SOURCE32 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple32.c)
	file(WRITE ${SIMPLE_SOURCE32} "#include <stdlib.h>\nint main() {}")
	try_compile(CAN_TARGET_I386 ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE32}
	COMPILE_DEFINITIONS "${TARGET_I386_CFLAGS}"
	CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_I386_CFLAGS}")

	# 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 ${ARGN})
	if(${arch} STREQUAL "x86_64" AND CAN_TARGET_X86_64)
	list(APPEND archs ${arch})
	elseif (${arch} STREQUAL "i386" AND CAN_TARGET_I386)
	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()

	# Because compiler-rt spends a lot of time setting up custom compile flags,
	# define a handy helper function for it. The compile flags setting in CMake
	# has serious issues that make its syntax challenging at best.
	function(set_target_compile_flags target)
	foreach(arg ${ARGN})
	set(argstring "${argstring} ${arg}")
	endforeach()
	set_property(TARGET ${target} PROPERTY COMPILE_FLAGS "${argstring}")
	endfunction()

	function(set_target_link_flags target)
	foreach(arg ${ARGN})
	set(argstring "${argstring} ${arg}")
	endforeach()
	set_property(TARGET ${target} PROPERTY LINK_FLAGS "${argstring}")
	endfunction()

	# 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)

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

	# Call add_clang_compiler_rt_libraries to make sure that targets are built
	# and installed in the directories where Clang driver expects to find them.
	macro(add_clang_compiler_rt_libraries)
	# Setup output directories so that clang in build tree works.
	set_target_properties(${ARGN} PROPERTIES
	ARCHIVE_OUTPUT_DIRECTORY
	${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/lib/${LIBCLANG_OS_DIR}
	LIBRARY_OUTPUT_DIRECTORY
	${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/lib/${LIBCLANG_OS_DIR}
	)
	# Add installation command.
	install(TARGETS ${ARGN}
	ARCHIVE DESTINATION ${LIBCLANG_INSTALL_PATH}/lib/${LIBCLANG_OS_DIR}
	LIBRARY DESTINATION ${LIBCLANG_INSTALL_PATH}/lib/${LIBCLANG_OS_DIR}
	)
	endmacro(add_clang_compiler_rt_libraries)

	# 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()