1 # CMake build for CompilerRT.
3 # This build assumes that CompilerRT is checked out into the
4 # 'projects/compiler-rt' inside of an LLVM tree.
5 # Standalone build system for CompilerRT is not yet ready.
7 # An important constraint of the build is that it only produces libraries
8 # based on the ability of the host toolchain to target various platforms.
10 # Check if compiler-rt is built as a standalone project.
11 if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
13 set(COMPILER_RT_STANDALONE_BUILD TRUE)
15 set(COMPILER_RT_STANDALONE_BUILD FALSE)
18 # The CompilerRT build system requires CMake version 2.8.8 or higher in order
19 # to use its support for building convenience "libraries" as a collection of
20 # .o files. This is particularly useful in producing larger, more complex
23 cmake_minimum_required(VERSION 2.8.8)
25 # Version 2.8.12.1 is required to build with Visual Studion 2013.
26 cmake_minimum_required(VERSION 2.8.12.1)
29 # FIXME: It may be removed when we use 2.8.12.
30 if(CMAKE_VERSION VERSION_LESS 2.8.12)
31 # Invalidate a couple of keywords.
32 set(cmake_2_8_12_INTERFACE)
33 set(cmake_2_8_12_PRIVATE)
35 # Use ${cmake_2_8_12_KEYWORD} intead of KEYWORD in target_link_libraries().
36 set(cmake_2_8_12_INTERFACE INTERFACE)
37 set(cmake_2_8_12_PRIVATE PRIVATE)
39 cmake_policy(SET CMP0022 NEW) # automatic when 2.8.12 is required
43 # Top level target used to build all compiler-rt libraries.
44 add_custom_target(compiler-rt ALL)
46 if (NOT COMPILER_RT_STANDALONE_BUILD)
47 # Compute the Clang version from the LLVM version.
48 # FIXME: We should be able to reuse CLANG_VERSION variable calculated
49 # in Clang cmake files, instead of copying the rules here.
50 string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
52 # Setup the paths where compiler-rt runtimes and headers should be stored.
53 set(COMPILER_RT_OUTPUT_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/clang/${CLANG_VERSION})
54 set(COMPILER_RT_EXEC_OUTPUT_DIR ${LLVM_RUNTIME_OUTPUT_INTDIR})
55 set(COMPILER_RT_INSTALL_PATH lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION})
56 option(COMPILER_RT_INCLUDE_TESTS "Generate and build compiler-rt unit tests."
57 ${LLVM_INCLUDE_TESTS})
58 option(COMPILER_RT_ENABLE_WERROR "Fail and stop if warning is triggered"
59 ${LLVM_ENABLE_WERROR})
60 # Use just-built Clang to compile/link tests.
61 set(COMPILER_RT_TEST_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang)
62 set(COMPILER_RT_TEST_COMPILER_ID Clang)
64 # Take output dir and install path from the user.
65 set(COMPILER_RT_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR} CACHE PATH
66 "Path where built compiler-rt libraries should be stored.")
67 set(COMPILER_RT_EXEC_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}/bin CACHE PATH
68 "Path where built compiler-rt executables should be stored.")
69 set(COMPILER_RT_INSTALL_PATH ${CMAKE_INSTALL_PREFIX} CACHE PATH
70 "Path where built compiler-rt libraries should be installed.")
71 option(COMPILER_RT_INCLUDE_TESTS "Generate and build compiler-rt unit tests." OFF)
72 option(COMPILER_RT_ENABLE_WERROR "Fail and stop if warning is triggered" OFF)
73 # Use a host compiler to compile/link tests.
74 set(COMPILER_RT_TEST_COMPILER ${CMAKE_C_COMPILER})
75 set(COMPILER_RT_TEST_COMPILER_ID ${CMAKE_C_COMPILER_ID})
77 set(LLVM_CONFIG_PATH "" CACHE PATH "Path to llvm-config binary")
78 if (NOT LLVM_CONFIG_PATH)
79 find_program(LLVM_CONFIG_PATH "llvm-config")
80 if (NOT LLVM_CONFIG_PATH)
81 message(FATAL_ERROR "llvm-config not found: specify LLVM_CONFIG_PATH")
85 COMMAND ${LLVM_CONFIG_PATH} "--obj-root" "--bindir" "--libdir" "--src-root"
86 RESULT_VARIABLE HAD_ERROR
87 OUTPUT_VARIABLE CONFIG_OUTPUT)
89 message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
91 string(REGEX REPLACE "[ \t]*[\r\n]+[ \t]*" ";" CONFIG_OUTPUT ${CONFIG_OUTPUT})
92 list(GET CONFIG_OUTPUT 0 LLVM_BINARY_DIR)
93 list(GET CONFIG_OUTPUT 1 LLVM_TOOLS_BINARY_DIR)
94 list(GET CONFIG_OUTPUT 2 LLVM_LIBRARY_DIR)
95 list(GET CONFIG_OUTPUT 3 LLVM_MAIN_SRC_DIR)
97 # Make use of LLVM CMake modules.
98 set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR}/share/llvm/cmake")
99 list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
100 # Get some LLVM variables from LLVMConfig.
101 include("${LLVM_CMAKE_PATH}/LLVMConfig.cmake")
103 set(LLVM_LIBRARY_OUTPUT_INTDIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib)
105 # Find Python interpreter.
106 set(Python_ADDITIONAL_VERSIONS 2.7 2.6 2.5)
107 include(FindPythonInterp)
108 if(NOT PYTHONINTERP_FOUND)
109 message(FATAL_ERROR "
110 Unable to find Python interpreter required testing. Please install Python
111 or specify the PYTHON_EXECUTABLE CMake variable.")
114 # Define default arguments to lit.
115 set(LIT_ARGS_DEFAULT "-sv")
117 set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
119 set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit")
122 string(TOLOWER ${CMAKE_SYSTEM_NAME} COMPILER_RT_OS_DIR)
123 set(COMPILER_RT_LIBRARY_OUTPUT_DIR
124 ${COMPILER_RT_OUTPUT_DIR}/lib/${COMPILER_RT_OS_DIR})
125 set(COMPILER_RT_LIBRARY_INSTALL_DIR
126 ${COMPILER_RT_INSTALL_PATH}/lib/${COMPILER_RT_OS_DIR})
128 # Add path for custom compiler-rt modules.
129 set(CMAKE_MODULE_PATH
130 "${CMAKE_CURRENT_SOURCE_DIR}/cmake"
131 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
134 include(CompilerRTUtils)
136 set(COMPILER_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
137 set(COMPILER_RT_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
138 # Setup custom SDK sysroots.
139 set(COMPILER_RT_DARWIN_SDK_SYSROOT ${COMPILER_RT_SOURCE_DIR}/SDKs/darwin)
140 set(COMPILER_RT_LINUX_SDK_SYSROOT ${COMPILER_RT_SOURCE_DIR}/SDKs/linux)
142 set(COMPILER_RT_EXTRA_ANDROID_HEADERS ${COMPILER_RT_SOURCE_DIR}/third_party/android/include)
144 # Detect whether the current target platform is 32-bit or 64-bit, and setup
145 # the correct commandline flags needed to attempt to target 32-bit and 64-bit.
146 if (NOT CMAKE_SIZEOF_VOID_P EQUAL 4 AND
147 NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
148 message(FATAL_ERROR "Please use architecture with 4 or 8 byte pointers.")
151 set(TARGET_64_BIT_CFLAGS "-m64")
152 set(TARGET_32_BIT_CFLAGS "-m32")
154 set(TARGET_64_BIT_CFLAGS "")
155 set(TARGET_32_BIT_CFLAGS "")
158 # List of architectures we can target.
159 set(COMPILER_RT_SUPPORTED_ARCH)
161 function(get_target_flags_for_arch arch out_var)
162 list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
163 if(ARCH_INDEX EQUAL -1)
164 message(FATAL_ERROR "Unsupported architecture: ${arch}")
166 set(${out_var} ${TARGET_${arch}_CFLAGS} PARENT_SCOPE)
170 # Try to compile a very simple source file to ensure we can target the given
171 # platform. We use the results of these tests to build only the various target
172 # runtime libraries supported by our current compilers cross-compiling
174 set(SIMPLE_SOURCE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple.c)
175 file(WRITE ${SIMPLE_SOURCE} "#include <stdlib.h>\nint main() {}")
177 # test_target_arch(<arch> <target flags...>)
178 # Sets the target flags for a given architecture and determines if this
179 # architecture is supported by trying to build a simple file.
180 macro(test_target_arch arch)
181 set(TARGET_${arch}_CFLAGS ${ARGN})
182 try_compile(CAN_TARGET_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE}
183 COMPILE_DEFINITIONS "${TARGET_${arch}_CFLAGS}"
184 CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_${arch}_CFLAGS}")
185 if(${CAN_TARGET_${arch}})
186 list(APPEND COMPILER_RT_SUPPORTED_ARCH ${arch})
190 if(ANDROID_COMMON_FLAGS)
191 test_target_arch(arm_android "${ANDROID_COMMON_FLAGS}")
193 if("${LLVM_NATIVE_ARCH}" STREQUAL "X86")
195 test_target_arch(x86_64 ${TARGET_64_BIT_CFLAGS})
197 test_target_arch(i386 ${TARGET_32_BIT_CFLAGS})
198 elseif("${LLVM_NATIVE_ARCH}" STREQUAL "PowerPC")
199 test_target_arch(powerpc64 ${TARGET_64_BIT_CFLAGS})
200 elseif("${LLVM_NATIVE_ARCH}" STREQUAL "ARM")
201 test_target_arch(arm "")
205 # We only support running instrumented tests when we're not cross compiling
206 # and target a unix-like system. We can run tests on Android even when we are
208 if(("${CMAKE_HOST_SYSTEM}" STREQUAL "${CMAKE_SYSTEM}" AND UNIX) OR ANDROID)
209 option(COMPILER_RT_CAN_EXECUTE_TESTS "Can we execute instrumented tests" ON)
211 option(COMPILER_RT_CAN_EXECUTE_TESTS "Can we execute instrumented tests" OFF)
214 # Check if compiler-rt is built with libc++.
215 find_flag_in_string("${CMAKE_CXX_FLAGS}" "-stdlib=libc++"
216 COMPILER_RT_USES_LIBCXX)
218 function(filter_available_targets out_var)
220 foreach(arch ${ARGN})
221 list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
222 if(NOT (ARCH_INDEX EQUAL -1) AND CAN_TARGET_${arch})
223 list(APPEND archs ${arch})
226 set(${out_var} ${archs} PARENT_SCOPE)
229 option(COMPILER_RT_DEBUG "Build runtimes with full debug info" OFF)
230 # COMPILER_RT_DEBUG_PYBOOL is used by lit.common.configured.in.
231 pythonize_bool(COMPILER_RT_DEBUG)
233 #================================
234 # Setup Compiler Flags
235 #================================
238 if(COMPILER_RT_ENABLE_WERROR)
239 add_definitions_if(COMPILER_RT_HAS_WERROR_FLAG -Werror)
240 add_definitions_if(COMPILER_RT_HAS_WX_FLAG /WX)
243 # Emulate C99 and C++11's __func__ for MSVC prior to 2013 CTP.
244 if(NOT COMPILER_RT_HAS_FUNC_SYMBOL)
245 add_definitions(-D__func__=__FUNCTION__)
248 # Provide some common commmandline flags for Sanitizer runtimes.
249 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_FPIC_FLAG -fPIC)
250 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_FNO_BUILTIN_FLAG -fno-builtin)
251 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_FNO_EXCEPTIONS_FLAG -fno-exceptions)
252 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_FOMIT_FRAME_POINTER_FLAG -fomit-frame-pointer)
253 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_FUNWIND_TABLES_FLAG -funwind-tables)
254 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_FNO_STACK_PROTECTOR_FLAG -fno-stack-protector)
255 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG -fvisibility=hidden)
256 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG -fno-function-sections)
259 # Remove /MD flag so that it doesn't conflict with /MT.
260 if(COMPILER_RT_HAS_MT_FLAG)
261 string(REGEX REPLACE "(^| ) */MD *( |$)" "\\1 \\2" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
262 list(APPEND SANITIZER_COMMON_CFLAGS /MT)
264 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_Oy_FLAG /Oy-)
265 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_GS_FLAG /GS-)
268 # Build with optimization, unless we're in debug mode.
269 if(NOT COMPILER_RT_DEBUG)
271 list(APPEND SANITIZER_COMMON_CFLAGS /O2)
273 list(APPEND SANITIZER_COMMON_CFLAGS -O3)
277 # Build sanitizer runtimes with debug info.
278 if(COMPILER_RT_HAS_GLINE_TABLES_ONLY_FLAG)
279 list(APPEND SANITIZER_COMMON_CFLAGS -gline-tables-only)
280 elseif(COMPILER_RT_HAS_G_FLAG)
281 list(APPEND SANITIZER_COMMON_CFLAGS -g)
282 elseif(COMPILER_RT_HAS_Zi_FLAG)
283 list(APPEND SANITIZER_COMMON_CFLAGS /Zi)
286 # Turn off several warnings.
287 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_WNO_GNU_FLAG -Wno-gnu)
288 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_WNO_VARIADIC_MACROS_FLAG -Wno-variadic-macros)
289 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_WNO_C99_EXTENSIONS_FLAG -Wno-c99-extensions)
290 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_WNO_NON_VIRTUAL_DTOR_FLAG -Wno-non-virtual-dtor)
291 append_if(SANITIZER_COMMON_CFLAGS COMPILER_RT_HAS_WD4722_FLAG /wd4722)
294 # Obtain the iOS Simulator SDK path from xcodebuild.
296 COMMAND xcodebuild -version -sdk iphonesimulator Path
297 OUTPUT_VARIABLE IOSSIM_SDK_DIR
298 OUTPUT_STRIP_TRAILING_WHITESPACE
300 string(REGEX MATCH "-mmacosx-version-min="
301 MACOSX_VERSION_MIN_FLAG "${CMAKE_CXX_FLAGS}")
302 set(SANITIZER_COMMON_SUPPORTED_DARWIN_OS osx)
303 if (IOSSIM_SDK_DIR AND NOT MACOSX_VERSION_MIN_FLAG)
304 list(APPEND SANITIZER_COMMON_SUPPORTED_DARWIN_OS iossim)
307 if(COMPILER_RT_USES_LIBCXX)
308 set(SANITIZER_MIN_OSX_VERSION 10.7)
310 set(SANITIZER_MIN_OSX_VERSION 10.6)
312 set(DARWIN_osx_CFLAGS -mmacosx-version-min=${SANITIZER_MIN_OSX_VERSION})
313 set(DARWIN_iossim_CFLAGS
314 -mios-simulator-version-min=7.0 -isysroot ${IOSSIM_SDK_DIR})
315 set(DARWIN_osx_LINKFLAGS)
316 set(DARWIN_iossim_LINKFLAGS
317 -Wl,-ios_simulator_version_min,7.0.0
318 -mios-simulator-version-min=7.0
319 -isysroot ${IOSSIM_SDK_DIR})
322 # Architectures supported by Sanitizer runtimes. Specific sanitizers may
323 # support only subset of these (e.g. TSan works on x86_64 only).
324 filter_available_targets(SANITIZER_COMMON_SUPPORTED_ARCH
325 x86_64 i386 powerpc64 arm)
326 filter_available_targets(ASAN_SUPPORTED_ARCH x86_64 i386 powerpc64)
327 filter_available_targets(DFSAN_SUPPORTED_ARCH x86_64)
328 filter_available_targets(LSAN_SUPPORTED_ARCH x86_64)
329 filter_available_targets(MSAN_SUPPORTED_ARCH x86_64)
330 filter_available_targets(TSAN_SUPPORTED_ARCH x86_64)
331 filter_available_targets(UBSAN_SUPPORTED_ARCH x86_64 i386)
333 add_subdirectory(include)
335 set(COMPILER_RT_LIBCXX_PATH ${LLVM_MAIN_SRC_DIR}/projects/libcxx)
336 if(EXISTS ${COMPILER_RT_LIBCXX_PATH}/)
337 set(COMPILER_RT_HAS_LIBCXX_SOURCES TRUE)
339 set(COMPILER_RT_HAS_LIBCXX_SOURCES FALSE)
342 add_subdirectory(lib)
344 if(COMPILER_RT_INCLUDE_TESTS)
345 add_subdirectory(unittests)
347 add_subdirectory(test)