# CMake build for CompilerRT. # # This build assumes that CompilerRT is checked out into the # 'projects/compiler-rt' inside of an LLVM tree. # Standalone build system for CompilerRT is not yet ready. # # An important constraint of the build is that it only produces libraries # based on the ability of the host toolchain to target various platforms. # Check if compiler-rt is built as a standalone project. if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR) project(CompilerRT C CXX ASM) set(COMPILER_RT_STANDALONE_BUILD TRUE) else() set(COMPILER_RT_STANDALONE_BUILD FALSE) endif() # 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. if (NOT MSVC) cmake_minimum_required(VERSION 2.8.8) else() # Version 2.8.12.1 is required to build with Visual Studio 2013. cmake_minimum_required(VERSION 2.8.12.1) endif() # FIXME: It may be removed when we use 2.8.12. if(CMAKE_VERSION VERSION_LESS 2.8.12) # Invalidate a couple of keywords. set(cmake_2_8_12_INTERFACE) set(cmake_2_8_12_PRIVATE) if(APPLE) set(CMAKE_MACOSX_RPATH On) endif() else() # Use ${cmake_2_8_12_KEYWORD} intead of KEYWORD in target_link_libraries(). set(cmake_2_8_12_INTERFACE INTERFACE) set(cmake_2_8_12_PRIVATE PRIVATE) if(POLICY CMP0022) cmake_policy(SET CMP0022 NEW) # automatic when 2.8.12 is required endif() if(POLICY CMP0042) cmake_policy(SET CMP0042 NEW) # automatic when 2.8.12 is required endif() endif() # Top level target used to build all compiler-rt libraries. add_custom_target(compiler-rt ALL) option(COMPILER_RT_BUILD_BUILTINS "Build builtins" ON) mark_as_advanced(COMPILER_RT_BUILD_BUILTINS) option(COMPILER_RT_BUILD_SANITIZERS "Build sanitizers" ON) mark_as_advanced(COMPILER_RT_BUILD_SANITIZERS) if (NOT COMPILER_RT_STANDALONE_BUILD) # 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(COMPILER_RT_OUTPUT_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/clang/${CLANG_VERSION}) set(COMPILER_RT_EXEC_OUTPUT_DIR ${LLVM_RUNTIME_OUTPUT_INTDIR}) set(COMPILER_RT_INSTALL_PATH lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}) option(COMPILER_RT_INCLUDE_TESTS "Generate and build compiler-rt unit tests." ${LLVM_INCLUDE_TESTS}) option(COMPILER_RT_ENABLE_WERROR "Fail and stop if warning is triggered" ${LLVM_ENABLE_WERROR}) # Use just-built Clang to compile/link tests on all platforms, except for # Windows where we need to use clang-cl instead. if(NOT MSVC) set(COMPILER_RT_TEST_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang) set(COMPILER_RT_TEST_CXX_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang++) else() set(COMPILER_RT_TEST_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang.exe) set(COMPILER_RT_TEST_CXX_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang++.exe) endif() else() # Take output dir and install path from the user. set(COMPILER_RT_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR} CACHE PATH "Path where built compiler-rt libraries should be stored.") set(COMPILER_RT_EXEC_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}/bin CACHE PATH "Path where built compiler-rt executables should be stored.") set(COMPILER_RT_INSTALL_PATH ${CMAKE_INSTALL_PREFIX} CACHE PATH "Path where built compiler-rt libraries should be installed.") option(COMPILER_RT_INCLUDE_TESTS "Generate and build compiler-rt unit tests." OFF) option(COMPILER_RT_ENABLE_WERROR "Fail and stop if warning is triggered" OFF) # Use a host compiler to compile/link tests. set(COMPILER_RT_TEST_COMPILER ${CMAKE_C_COMPILER} CACHE PATH "Compiler to use for testing") set(COMPILER_RT_TEST_CXX_COMPILER ${CMAKE_CXX_COMPILER} CACHE PATH "C++ Compiler to use for testing") if (NOT LLVM_CONFIG_PATH) find_program(LLVM_CONFIG_PATH "llvm-config" DOC "Path to llvm-config binary") if (NOT LLVM_CONFIG_PATH) message(FATAL_ERROR "llvm-config not found: specify LLVM_CONFIG_PATH") endif() endif() execute_process( COMMAND ${LLVM_CONFIG_PATH} "--obj-root" "--bindir" "--libdir" "--src-root" RESULT_VARIABLE HAD_ERROR OUTPUT_VARIABLE CONFIG_OUTPUT) if (HAD_ERROR) message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}") endif() string(REGEX REPLACE "[ \t]*[\r\n]+[ \t]*" ";" CONFIG_OUTPUT ${CONFIG_OUTPUT}) list(GET CONFIG_OUTPUT 0 LLVM_BINARY_DIR) list(GET CONFIG_OUTPUT 1 LLVM_TOOLS_BINARY_DIR) list(GET CONFIG_OUTPUT 2 LLVM_LIBRARY_DIR) list(GET CONFIG_OUTPUT 3 LLVM_MAIN_SRC_DIR) # Make use of LLVM CMake modules. file(TO_CMAKE_PATH ${LLVM_BINARY_DIR} LLVM_BINARY_DIR_CMAKE_STYLE) set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR_CMAKE_STYLE}/lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm") list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}") # Get some LLVM variables from LLVMConfig. include("${LLVM_CMAKE_PATH}/LLVMConfig.cmake") set(LLVM_LIBRARY_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX}) # Find Python interpreter. set(Python_ADDITIONAL_VERSIONS 2.7 2.6 2.5) include(FindPythonInterp) if(NOT PYTHONINTERP_FOUND) message(FATAL_ERROR " Unable to find Python interpreter required testing. Please install Python or specify the PYTHON_EXECUTABLE CMake variable.") endif() # Define default arguments to lit. set(LIT_ARGS_DEFAULT "-sv") if (MSVC OR XCODE) set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar") endif() set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit") endif() if("${COMPILER_RT_TEST_COMPILER}" MATCHES "clang[+]*$") set(COMPILER_RT_TEST_COMPILER_ID Clang) elseif("${COMPILER_RT_TEST_COMPILER}" MATCHES "clang.*.exe$") set(COMPILER_RT_TEST_COMPILER_ID Clang) else() set(COMPILER_RT_TEST_COMPILER_ID GNU) endif() set(COMPILER_RT_DEFAULT_TARGET_TRIPLE ${TARGET_TRIPLE} CACHE STRING "Default triple for which compiler-rt runtimes will be built.") if(DEFINED COMPILER_RT_TEST_TARGET_TRIPLE) # Backwards compatibility: this variable used to be called # COMPILER_RT_TEST_TARGET_TRIPLE. set(COMPILER_RT_DEFAULT_TARGET_TRIPLE ${COMPILER_RT_TEST_TARGET_TRIPLE}) endif() string(REPLACE "-" ";" TARGET_TRIPLE_LIST ${COMPILER_RT_DEFAULT_TARGET_TRIPLE}) list(GET TARGET_TRIPLE_LIST 0 COMPILER_RT_DEFAULT_TARGET_ARCH) list(GET TARGET_TRIPLE_LIST 1 COMPILER_RT_DEFAULT_TARGET_OS) list(GET TARGET_TRIPLE_LIST 2 COMPILER_RT_DEFAULT_TARGET_ABI) # Determine if test target triple is specified explicitly, and doesn't match the # default. if(NOT COMPILER_RT_DEFAULT_TARGET_TRIPLE STREQUAL TARGET_TRIPLE) set(COMPILER_RT_HAS_EXPLICIT_DEFAULT_TARGET_TRIPLE TRUE) else() set(COMPILER_RT_HAS_EXPLICIT_DEFAULT_TARGET_TRIPLE FALSE) endif() if ("${COMPILER_RT_DEFAULT_TARGET_ABI}" STREQUAL "androideabi") set(ANDROID 1) endif() string(TOLOWER ${CMAKE_SYSTEM_NAME} COMPILER_RT_OS_DIR) set(COMPILER_RT_LIBRARY_OUTPUT_DIR ${COMPILER_RT_OUTPUT_DIR}/lib/${COMPILER_RT_OS_DIR}) set(COMPILER_RT_LIBRARY_INSTALL_DIR ${COMPILER_RT_INSTALL_PATH}/lib/${COMPILER_RT_OS_DIR}) # Add path for custom compiler-rt modules. set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" ${CMAKE_MODULE_PATH} ) include(CompilerRTUtils) set(COMPILER_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}) set(COMPILER_RT_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}) # We support running instrumented tests when we're not cross compiling # and target a UNIX-like system or Windows. # We can run tests on Android even when we are cross-compiling. if(("${CMAKE_HOST_SYSTEM}" STREQUAL "${CMAKE_SYSTEM}" AND (UNIX OR WIN32)) OR ANDROID OR COMPILER_RT_EMULATOR) option(COMPILER_RT_CAN_EXECUTE_TESTS "Can we execute instrumented tests" ON) else() option(COMPILER_RT_CAN_EXECUTE_TESTS "Can we execute instrumented tests" OFF) endif() option(COMPILER_RT_DEBUG "Build runtimes with full debug info" OFF) option(COMPILER_RT_EXTERNALIZE_DEBUGINFO "Generate dSYM files and strip executables and libraries (Darwin Only)" OFF) # COMPILER_RT_DEBUG_PYBOOL is used by lit.common.configured.in. pythonize_bool(COMPILER_RT_DEBUG) #================================ # Setup Compiler Flags #================================ include(CheckIncludeFile) check_include_file(unwind.h HAVE_UNWIND_H) include(config-ix) if(MSVC) append_string_if(COMPILER_RT_HAS_W3_FLAG /W3 CMAKE_C_FLAGS CMAKE_CXX_FLAGS) else() append_string_if(COMPILER_RT_HAS_WALL_FLAG -Wall CMAKE_C_FLAGS CMAKE_CXX_FLAGS) endif() if(COMPILER_RT_ENABLE_WERROR) append_string_if(COMPILER_RT_HAS_WERROR_FLAG -Werror CMAKE_C_FLAGS CMAKE_CXX_FLAGS) append_string_if(COMPILER_RT_HAS_WX_FLAG /WX CMAKE_C_FLAGS CMAKE_CXX_FLAGS) endif() append_string_if(COMPILER_RT_HAS_STD_CXX11_FLAG -std=c++11 CMAKE_CXX_FLAGS) # Emulate C99 and C++11's __func__ for MSVC prior to 2013 CTP. if(NOT COMPILER_RT_HAS_FUNC_SYMBOL) add_definitions(-D__func__=__FUNCTION__) endif() # Provide some common commmandline flags for Sanitizer runtimes. append_list_if(COMPILER_RT_HAS_FPIC_FLAG -fPIC SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FNO_BUILTIN_FLAG -fno-builtin SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FNO_EXCEPTIONS_FLAG -fno-exceptions SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FOMIT_FRAME_POINTER_FLAG -fomit-frame-pointer SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FUNWIND_TABLES_FLAG -funwind-tables SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FNO_STACK_PROTECTOR_FLAG -fno-stack-protector SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FNO_SANITIZE_SAFE_STACK_FLAG -fno-sanitize=safe-stack SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG -fvisibility=hidden SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FVISIBILITY_INLINES_HIDDEN_FLAG -fvisibility-inlines-hidden SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG -fno-function-sections SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FNO_LTO_FLAG -fno-lto SANITIZER_COMMON_CFLAGS) if(MSVC) # Replace the /M[DT][d] flags with /MT, and strip any definitions of _DEBUG, # which cause definition mismatches at link time. # FIXME: In fact, sanitizers should support both /MT and /MD, see PR20214. if(COMPILER_RT_HAS_MT_FLAG) foreach(flag_var CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO) string(REGEX REPLACE "/M[DT]d" "/MT" ${flag_var} "${${flag_var}}") string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}") string(REGEX REPLACE "/D_DEBUG" "" ${flag_var} "${${flag_var}}") endforeach() endif() append_list_if(COMPILER_RT_HAS_Oy_FLAG /Oy- SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_GS_FLAG /GS- SANITIZER_COMMON_CFLAGS) # VS 2015 (version 1900) added support for thread safe static initialization. # However, ASan interceptors run before CRT initialization, which causes the # new thread safe code to crash. Disable this feature for now. if (MSVC_VERSION GREATER 1899) list(APPEND SANITIZER_COMMON_CFLAGS /Zc:threadSafeInit-) endif() endif() append_list_if(COMPILER_RT_DEBUG -DSANITIZER_DEBUG=1 SANITIZER_COMMON_CFLAGS) # Build with optimization, unless we're in debug mode. If we're using MSVC, # always respect the optimization flags set by CMAKE_BUILD_TYPE instead. if(NOT COMPILER_RT_DEBUG AND NOT MSVC) list(APPEND SANITIZER_COMMON_CFLAGS -O3) endif() # Determine if we should restrict stack frame sizes. # Stack frames on PowerPC and Mips and in debug biuld can be much larger than # anticipated. # FIXME: Fix all sanitizers and add -Wframe-larger-than to # SANITIZER_COMMON_FLAGS if(COMPILER_RT_HAS_WFRAME_LARGER_THAN_FLAG AND NOT COMPILER_RT_DEBUG AND NOT ${COMPILER_RT_DEFAULT_TARGET_ARCH} MATCHES "powerpc|mips") set(SANITIZER_LIMIT_FRAME_SIZE TRUE) else() set(SANITIZER_LIMIT_FRAME_SIZE FALSE) endif() # Build sanitizer runtimes with debug info. if(COMPILER_RT_HAS_GLINE_TABLES_ONLY_FLAG AND NOT COMPILER_RT_DEBUG) list(APPEND SANITIZER_COMMON_CFLAGS -gline-tables-only) elseif(COMPILER_RT_HAS_G_FLAG) list(APPEND SANITIZER_COMMON_CFLAGS -g) elseif(COMPILER_RT_HAS_Zi_FLAG) list(APPEND SANITIZER_COMMON_CFLAGS /Zi) endif() # Turn off several warnings. append_list_if(COMPILER_RT_HAS_WGNU_FLAG -Wno-gnu SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WVARIADIC_MACROS_FLAG -Wno-variadic-macros SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WC99_EXTENSIONS_FLAG -Wno-c99-extensions SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WNON_VIRTUAL_DTOR_FLAG -Wno-non-virtual-dtor SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WD4146_FLAG /wd4146 SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WD4291_FLAG /wd4291 SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WD4391_FLAG /wd4391 SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WD4722_FLAG /wd4722 SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WD4800_FLAG /wd4800 SANITIZER_COMMON_CFLAGS) if(APPLE AND SANITIZER_MIN_OSX_VERSION VERSION_LESS "10.9") # Mac OS X prior to 10.9 had problems with exporting symbols from # libc++/libc++abi. set(SANITIZER_CAN_USE_CXXABI FALSE) elseif(MSVC) set(SANITIZER_CAN_USE_CXXABI FALSE) else() set(SANITIZER_CAN_USE_CXXABI TRUE) endif() pythonize_bool(SANITIZER_CAN_USE_CXXABI) add_subdirectory(include) set(COMPILER_RT_LIBCXX_PATH ${LLVM_MAIN_SRC_DIR}/projects/libcxx) if(EXISTS ${COMPILER_RT_LIBCXX_PATH}/) set(COMPILER_RT_HAS_LIBCXX_SOURCES TRUE) else() set(COMPILER_RT_HAS_LIBCXX_SOURCES FALSE) endif() set(COMPILER_RT_LLD_PATH ${LLVM_MAIN_SRC_DIR}/tools/lld) if(EXISTS ${COMPILER_RT_LLD_PATH}/) set(COMPILER_RT_HAS_LLD_SOURCES TRUE) else() set(COMPILER_RT_HAS_LLD_SOURCES FALSE) endif() pythonize_bool(COMPILER_RT_HAS_LLD_SOURCES) add_subdirectory(lib) if(COMPILER_RT_INCLUDE_TESTS) add_subdirectory(unittests) add_subdirectory(test) endif()