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 # Compute the Clang version from the LLVM version.
19 # FIXME: We should be able to reuse CLANG_VERSION variable calculated
20 # in Clang cmake files, instead of copying the rules here.
21 string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
23 # Setup the paths where compiler-rt runtimes and headers should be stored.
24 set(LIBCLANG_INSTALL_PATH lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION})
25 string(TOLOWER ${CMAKE_SYSTEM_NAME} LIBCLANG_OS_DIR)
26 set(CLANG_RESOURCE_DIR ${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION})
27 set(COMPILER_RT_LIBRARY_OUTPUT_DIR ${CLANG_RESOURCE_DIR}/lib/${LIBCLANG_OS_DIR})
28 set(COMPILER_RT_LIBRARY_INSTALL_DIR
29 ${LIBCLANG_INSTALL_PATH}/lib/${LIBCLANG_OS_DIR})
31 # Add path for custom modules
34 "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
36 include(AddCompilerRT)
38 set(COMPILER_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
39 set(COMPILER_RT_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
40 # Setup custom SDK sysroots.
41 set(COMPILER_RT_DARWIN_SDK_SYSROOT ${COMPILER_RT_SOURCE_DIR}/SDKs/darwin)
42 set(COMPILER_RT_LINUX_SDK_SYSROOT ${COMPILER_RT_SOURCE_DIR}/SDKs/linux)
44 # Detect whether the current target platform is 32-bit or 64-bit, and setup
45 # the correct commandline flags needed to attempt to target 32-bit and 64-bit.
46 if(CMAKE_SIZEOF_VOID_P EQUAL 4 OR LLVM_BUILD_32_BITS)
47 set(TARGET_64_BIT_CFLAGS "-m64")
48 set(TARGET_32_BIT_CFLAGS "")
50 if(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
51 message(FATAL_ERROR "Please use a sane architecture with 4 or 8 byte pointers.")
53 set(TARGET_64_BIT_CFLAGS "")
54 set(TARGET_32_BIT_CFLAGS "-m32")
57 # List of architectures we can target.
58 set(COMPILER_RT_SUPPORTED_ARCH)
60 function(get_target_flags_for_arch arch out_var)
61 list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
62 if(ARCH_INDEX EQUAL -1)
63 message(FATAL_ERROR "Unsupported architecture: ${arch}")
65 set(${out_var} ${TARGET_${arch}_CFLAGS} PARENT_SCOPE)
69 # Try to compile a very simple source file to ensure we can target the given
70 # platform. We use the results of these tests to build only the various target
71 # runtime libraries supported by our current compilers cross-compiling
73 set(SIMPLE_SOURCE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple.c)
74 file(WRITE ${SIMPLE_SOURCE} "#include <stdlib.h>\nint main() {}")
76 # test_target_arch(<arch> <target flags...>)
77 # Sets the target flags for a given architecture and determines if this
78 # architecture is supported by trying to build a simple file.
79 macro(test_target_arch arch)
80 set(TARGET_${arch}_CFLAGS ${ARGN})
81 try_compile(CAN_TARGET_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE}
82 COMPILE_DEFINITIONS "${TARGET_${arch}_CFLAGS}"
83 CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_${arch}_CFLAGS}")
84 if(${CAN_TARGET_${arch}})
85 list(APPEND COMPILER_RT_SUPPORTED_ARCH ${arch})
89 if("${LLVM_NATIVE_ARCH}" STREQUAL "X86")
90 test_target_arch(x86_64 ${TARGET_64_BIT_CFLAGS})
91 test_target_arch(i386 ${TARGET_32_BIT_CFLAGS})
92 elseif("${LLVM_NATIVE_ARCH}" STREQUAL "PowerPC")
93 # Explicitly set -m flag on powerpc, because on ppc64 defaults for gcc and
94 # clang are different.
95 test_target_arch(powerpc64 "-m64")
96 test_target_arch(powerpc "-m32")
99 # We only support running instrumented tests when we're not cross compiling
100 # and target a unix-like system. On Android we define the rules for building
101 # unit tests, but don't execute them.
102 if("${CMAKE_HOST_SYSTEM}" STREQUAL "${CMAKE_SYSTEM}" AND UNIX AND NOT ANDROID)
103 option(COMPILER_RT_CAN_EXECUTE_TESTS "Can we execute instrumented tests" ON)
105 option(COMPILER_RT_CAN_EXECUTE_TESTS "Can we execute instrumented tests" OFF)
108 # Check if compiler-rt is built with libc++.
109 find_flag_in_string("${CMAKE_CXX_FLAGS}" "-stdlib=libc++"
110 COMPILER_RT_USES_LIBCXX)
112 function(filter_available_targets out_var)
114 foreach(arch ${ARGN})
115 list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
116 if(NOT (ARCH_INDEX EQUAL -1) AND CAN_TARGET_${arch})
117 list(APPEND archs ${arch})
120 set(${out_var} ${archs} PARENT_SCOPE)
123 # Provide some common commmandline flags for Sanitizer runtimes.
124 set(SANITIZER_COMMON_CFLAGS
131 -Wno-gnu # Variadic macros with 0 arguments for ...
135 list(APPEND SANITIZER_COMMON_CFLAGS -fvisibility=hidden)
137 # Build sanitizer runtimes with debug info.
138 check_cxx_compiler_flag(-gline-tables-only SUPPORTS_GLINE_TABLES_ONLY_FLAG)
139 if(SUPPORTS_GLINE_TABLES_ONLY_FLAG)
140 list(APPEND SANITIZER_COMMON_CFLAGS -gline-tables-only)
142 list(APPEND SANITIZER_COMMON_CFLAGS -g)
144 # Warnings suppressions.
145 check_cxx_compiler_flag(-Wno-variadic-macros SUPPORTS_NO_VARIADIC_MACROS_FLAG)
146 if(SUPPORTS_NO_VARIADIC_MACROS_FLAG)
147 list(APPEND SANITIZER_COMMON_CFLAGS -Wno-variadic-macros)
149 check_cxx_compiler_flag(-Wno-c99-extensions SUPPORTS_NO_C99_EXTENSIONS_FLAG)
150 if(SUPPORTS_NO_C99_EXTENSIONS_FLAG)
151 list(APPEND SANITIZER_COMMON_CFLAGS -Wno-c99-extensions)
153 # Sanitizer may not have libstdc++, so we can have problems with virtual
155 check_cxx_compiler_flag(-Wno-non-virtual-dtor SUPPORTS_NO_NON_VIRTUAL_DTOR_FLAG)
156 if (SUPPORTS_NO_NON_VIRTUAL_DTOR_FLAG)
157 list(APPEND SANITIZER_COMMON_CFLAGS -Wno-non-virtual-dtor)
160 # Setup min Mac OS X version.
162 if(COMPILER_RT_USES_LIBCXX)
163 set(SANITIZER_MIN_OSX_VERSION 10.7)
165 set(SANITIZER_MIN_OSX_VERSION 10.5)
167 list(APPEND SANITIZER_COMMON_CFLAGS
168 -mmacosx-version-min=${SANITIZER_MIN_OSX_VERSION})
171 # Architectures supported by Sanitizer runtimes. Specific sanitizers may
172 # support only subset of these (e.g. TSan works on x86_64 only).
173 filter_available_targets(SANITIZER_COMMON_SUPPORTED_ARCH
174 x86_64 i386 powerpc64)
176 # Add the public header's directory to the includes for all of compiler-rt.
177 include_directories(include)
178 add_subdirectory(include)
180 set(SANITIZER_COMMON_LIT_TEST_DEPS
181 clang clang-headers FileCheck count not llvm-nm llvm-symbolizer
184 add_subdirectory(lib)
186 if(LLVM_INCLUDE_TESTS)
187 # Currently the tests have not been ported to CMake, so disable this
190 #add_subdirectory(test)