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, it is not a stand-alone build
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 include(LLVMParseArguments)
12 # The CompilerRT build system requires CMake version 2.8.8 or higher in order
13 # to use its support for building convenience "libraries" as a collection of
14 # .o files. This is particularly useful in producing larger, more complex
16 cmake_minimum_required(VERSION 2.8.8)
18 # Top level target used to build all compiler-rt libraries.
19 add_custom_target(compiler-rt)
21 # Compute the Clang version from the LLVM version.
22 # FIXME: We should be able to reuse CLANG_VERSION variable calculated
23 # in Clang cmake files, instead of copying the rules here.
24 string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
26 # Setup the paths where compiler-rt runtimes and headers should be stored.
27 set(LIBCLANG_INSTALL_PATH lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION})
28 string(TOLOWER ${CMAKE_SYSTEM_NAME} LIBCLANG_OS_DIR)
29 set(CLANG_RESOURCE_DIR ${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION})
30 set(COMPILER_RT_LIBRARY_OUTPUT_DIR ${CLANG_RESOURCE_DIR}/lib/${LIBCLANG_OS_DIR})
31 set(COMPILER_RT_LIBRARY_INSTALL_DIR
32 ${LIBCLANG_INSTALL_PATH}/lib/${LIBCLANG_OS_DIR})
34 # Add path for custom modules
37 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
39 include(AddCompilerRT)
41 set(COMPILER_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
42 set(COMPILER_RT_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
43 # Setup custom SDK sysroots.
44 set(COMPILER_RT_DARWIN_SDK_SYSROOT ${COMPILER_RT_SOURCE_DIR}/SDKs/darwin)
45 set(COMPILER_RT_LINUX_SDK_SYSROOT ${COMPILER_RT_SOURCE_DIR}/SDKs/linux)
46 include(SanitizerUtils)
48 # Detect whether the current target platform is 32-bit or 64-bit, and setup
49 # the correct commandline flags needed to attempt to target 32-bit and 64-bit.
50 if (NOT CMAKE_SIZEOF_VOID_P EQUAL 4 AND
51 NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
52 message(FATAL_ERROR "Please use architecture with 4 or 8 byte pointers.")
55 set(TARGET_64_BIT_CFLAGS "-m64")
56 set(TARGET_32_BIT_CFLAGS "-m32")
58 set(TARGET_64_BIT_CFLAGS "")
59 set(TARGET_32_BIT_CFLAGS "")
62 # List of architectures we can target.
63 set(COMPILER_RT_SUPPORTED_ARCH)
65 function(get_target_flags_for_arch arch out_var)
66 list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
67 if(ARCH_INDEX EQUAL -1)
68 message(FATAL_ERROR "Unsupported architecture: ${arch}")
70 set(${out_var} ${TARGET_${arch}_CFLAGS} PARENT_SCOPE)
74 # Try to compile a very simple source file to ensure we can target the given
75 # platform. We use the results of these tests to build only the various target
76 # runtime libraries supported by our current compilers cross-compiling
78 set(SIMPLE_SOURCE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple.c)
79 file(WRITE ${SIMPLE_SOURCE} "#include <stdlib.h>\nint main() {}")
81 # test_target_arch(<arch> <target flags...>)
82 # Sets the target flags for a given architecture and determines if this
83 # architecture is supported by trying to build a simple file.
84 macro(test_target_arch arch)
85 set(TARGET_${arch}_CFLAGS ${ARGN})
86 try_compile(CAN_TARGET_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE}
87 COMPILE_DEFINITIONS "${TARGET_${arch}_CFLAGS}"
88 CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_${arch}_CFLAGS}")
89 if(${CAN_TARGET_${arch}})
90 list(APPEND COMPILER_RT_SUPPORTED_ARCH ${arch})
94 if("${LLVM_NATIVE_ARCH}" STREQUAL "X86")
96 test_target_arch(x86_64 ${TARGET_64_BIT_CFLAGS})
98 test_target_arch(i386 ${TARGET_32_BIT_CFLAGS})
99 elseif("${LLVM_NATIVE_ARCH}" STREQUAL "PowerPC")
100 test_target_arch(powerpc64 ${TARGET_64_BIT_CFLAGS})
101 elseif("${LLVM_NATIVE_ARCH}" STREQUAL "ARM")
102 test_target_arch(arm "")
105 # We only support running instrumented tests when we're not cross compiling
106 # and target a unix-like system. On Android we define the rules for building
107 # unit tests, but don't execute them.
108 if("${CMAKE_HOST_SYSTEM}" STREQUAL "${CMAKE_SYSTEM}" AND UNIX AND NOT ANDROID)
109 option(COMPILER_RT_CAN_EXECUTE_TESTS "Can we execute instrumented tests" ON)
111 option(COMPILER_RT_CAN_EXECUTE_TESTS "Can we execute instrumented tests" OFF)
114 # Check if compiler-rt is built with libc++.
115 find_flag_in_string("${CMAKE_CXX_FLAGS}" "-stdlib=libc++"
116 COMPILER_RT_USES_LIBCXX)
118 function(filter_available_targets out_var)
120 foreach(arch ${ARGN})
121 list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
122 if(NOT (ARCH_INDEX EQUAL -1) AND CAN_TARGET_${arch})
123 list(APPEND archs ${arch})
126 set(${out_var} ${archs} PARENT_SCOPE)
129 option(COMPILER_RT_DEBUG "Build runtimes with full debug info" OFF)
131 # COMPILER_RT_DEBUG_PYBOOL is used by lit.common.configured.in.
132 pythonize_bool(COMPILER_RT_DEBUG)
134 # Provide some common commmandline flags for Sanitizer runtimes.
136 set(SANITIZER_COMMON_CFLAGS
143 -Wno-gnu # Variadic macros with 0 arguments for ...
145 if (NOT COMPILER_RT_DEBUG)
146 list(APPEND SANITIZER_COMMON_CFLAGS -O3)
149 set(SANITIZER_COMMON_CFLAGS
157 # Build sanitizer runtimes with debug info. (MSVC gets /Zi above)
159 check_cxx_compiler_flag(-gline-tables-only SUPPORTS_GLINE_TABLES_ONLY_FLAG)
160 if(SUPPORTS_GLINE_TABLES_ONLY_FLAG AND NOT COMPILER_RT_DEBUG)
161 list(APPEND SANITIZER_COMMON_CFLAGS -gline-tables-only)
163 list(APPEND SANITIZER_COMMON_CFLAGS -g)
166 # Build sanitizer runtimes with -fno-function-sections.
167 check_cxx_compiler_flag("-Werror -fno-function-sections" SUPPORTS_FNO_FUNCTION_SECTIONS_FLAG)
168 if(SUPPORTS_FNO_FUNCTION_SECTIONS_FLAG)
169 list(APPEND SANITIZER_COMMON_CFLAGS -fno-function-sections)
171 # Warnings suppressions.
172 check_cxx_compiler_flag(-Wno-variadic-macros SUPPORTS_NO_VARIADIC_MACROS_FLAG)
173 if(SUPPORTS_NO_VARIADIC_MACROS_FLAG)
174 list(APPEND SANITIZER_COMMON_CFLAGS -Wno-variadic-macros)
176 check_cxx_compiler_flag(-Wno-c99-extensions SUPPORTS_NO_C99_EXTENSIONS_FLAG)
177 if(SUPPORTS_NO_C99_EXTENSIONS_FLAG)
178 list(APPEND SANITIZER_COMMON_CFLAGS -Wno-c99-extensions)
180 # Sanitizer may not have libstdc++, so we can have problems with virtual
182 check_cxx_compiler_flag(-Wno-non-virtual-dtor SUPPORTS_NO_NON_VIRTUAL_DTOR_FLAG)
183 if (SUPPORTS_NO_NON_VIRTUAL_DTOR_FLAG)
184 list(APPEND SANITIZER_COMMON_CFLAGS -Wno-non-virtual-dtor)
186 check_cxx_compiler_flag(-Wglobal-constructors SUPPORTS_GLOBAL_CONSTRUCTORS_FLAG)
187 # Not all sanitizers forbid global constructors.
190 # Obtain the iOS Simulator SDK path from xcodebuild.
192 COMMAND xcodebuild -version -sdk iphonesimulator Path
193 OUTPUT_VARIABLE IOSSIM_SDK_DIR
194 OUTPUT_STRIP_TRAILING_WHITESPACE
196 set(SANITIZER_COMMON_SUPPORTED_DARWIN_OS osx)
198 list(APPEND SANITIZER_COMMON_SUPPORTED_DARWIN_OS iossim)
201 if(COMPILER_RT_USES_LIBCXX)
202 set(SANITIZER_MIN_OSX_VERSION 10.7)
204 set(SANITIZER_MIN_OSX_VERSION 10.6)
206 set(DARWIN_osx_CFLAGS -mmacosx-version-min=${SANITIZER_MIN_OSX_VERSION})
207 set(DARWIN_iossim_CFLAGS
208 -mios-simulator-version-min=7.0 -isysroot ${IOSSIM_SDK_DIR})
209 set(DARWIN_osx_LINKFLAGS)
210 set(DARWIN_iossim_LINKFLAGS
211 -Wl,-ios_simulator_version_min,7.0.0
212 -mios-simulator-version-min=7.0
213 -isysroot ${IOSSIM_SDK_DIR})
216 # Architectures supported by Sanitizer runtimes. Specific sanitizers may
217 # support only subset of these (e.g. TSan works on x86_64 only).
218 filter_available_targets(SANITIZER_COMMON_SUPPORTED_ARCH
219 x86_64 i386 powerpc64 arm)
221 add_subdirectory(include)
223 set(SANITIZER_COMMON_LIT_TEST_DEPS
224 clang clang-headers FileCheck count not llvm-nm llvm-symbolizer
226 # Check code style when running lit tests for sanitizers.
228 list(APPEND SANITIZER_COMMON_LIT_TEST_DEPS SanitizerLintCheck)
231 add_subdirectory(lib)
233 if(LLVM_INCLUDE_TESTS)
234 # Currently the tests have not been ported to CMake, so disable this
237 #add_subdirectory(test)