forked from OSchip/llvm-project
184 lines
6.7 KiB
CMake
184 lines
6.7 KiB
CMake
# CMake build for CompilerRT.
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#
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# This build assumes that CompilerRT is checked out into the
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# 'projects/compiler-rt' inside of an LLVM tree, it is not a stand-alone build
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# system.
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#
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# An important constraint of the build is that it only produces libraries
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# based on the ability of the host toolchain to target various platforms.
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include(LLVMParseArguments)
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# The CompilerRT build system requires CMake version 2.8.8 or higher in order
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# to use its support for building convenience "libraries" as a collection of
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# .o files. This is particularly useful in producing larger, more complex
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# runtime libraries.
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cmake_minimum_required(VERSION 2.8.8)
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# Add path for custom modules
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set(CMAKE_MODULE_PATH
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${CMAKE_MODULE_PATH}
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"${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
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)
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set(COMPILER_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
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# FIXME: Below we assume that the target build of LLVM/Clang is x86, which is
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# not at all valid. Much of this can be fixed just by switching to use
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# a just-built-clang binary for the compiles.
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# Detect whether the current target platform is 32-bit or 64-bit, and setup
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# the correct commandline flags needed to attempt to target 32-bit and 64-bit.
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if(CMAKE_SIZEOF_VOID_P EQUAL 4 OR LLVM_BUILD_32_BITS)
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set(TARGET_X86_64_CFLAGS "-m64")
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set(TARGET_I386_CFLAGS "")
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else()
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if(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
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message(FATAL_ERROR "Please use a sane architecture with 4 or 8 byte pointers.")
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endif()
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set(TARGET_X86_64_CFLAGS "")
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set(TARGET_I386_CFLAGS "-m32")
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endif()
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function(get_target_flags_for_arch arch out_var)
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if(${arch} STREQUAL "x86_64")
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set(${out_var} ${TARGET_X86_64_CFLAGS} PARENT_SCOPE)
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elseif(${arch} STREQUAL "i386")
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set(${out_var} ${TARGET_I386_CFLAGS} PARENT_SCOPE)
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else()
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message(FATAL_ERROR "Unsupported architecture: ${arch}")
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endif()
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endfunction()
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# Try to compile a very simple source file to ensure we can target the given
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# platform. We use the results of these tests to build only the various target
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# runtime libraries supported by our current compilers cross-compiling
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# abilities.
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set(SIMPLE_SOURCE64 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple64.c)
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file(WRITE ${SIMPLE_SOURCE64} "#include <stdlib.h>\nint main() {}")
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try_compile(CAN_TARGET_X86_64 ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE64}
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COMPILE_DEFINITIONS "${TARGET_X86_64_CFLAGS}"
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CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_X86_64_CFLAGS}")
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set(SIMPLE_SOURCE32 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple32.c)
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file(WRITE ${SIMPLE_SOURCE32} "#include <stdlib.h>\nint main() {}")
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try_compile(CAN_TARGET_I386 ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE32}
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COMPILE_DEFINITIONS "${TARGET_I386_CFLAGS}"
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CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_I386_CFLAGS}")
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# We only support running instrumented tests when we're not cross compiling
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# and target a unix-like system. On Android we define the rules for building
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# unit tests, but don't execute them.
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if("${CMAKE_HOST_SYSTEM}" STREQUAL "${CMAKE_SYSTEM}" AND UNIX AND NOT ANDROID)
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set(COMPILER_RT_CAN_EXECUTE_TESTS TRUE)
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else()
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set(COMPILER_RT_CAN_EXECUTE_TESTS FALSE)
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endif()
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function(filter_available_targets out_var)
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set(archs)
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foreach(arch ${ARGN})
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if(${arch} STREQUAL "x86_64" AND CAN_TARGET_X86_64)
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list(APPEND archs ${arch})
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elseif (${arch} STREQUAL "i386" AND CAN_TARGET_I386)
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list(APPEND archs ${arch})
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endif()
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endforeach()
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set(${out_var} ${archs} PARENT_SCOPE)
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endfunction()
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# Provide some common commmandline flags for Sanitizer runtimes.
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set(SANITIZER_COMMON_CFLAGS
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-fPIC
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-fno-builtin
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-fno-exceptions
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-fomit-frame-pointer
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-funwind-tables
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-O3
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)
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if(NOT WIN32)
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list(APPEND SANITIZER_COMMON_CFLAGS -fvisibility=hidden)
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endif()
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# Build sanitizer runtimes with debug info.
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check_cxx_compiler_flag(-gline-tables-only SUPPORTS_GLINE_TABLES_ONLY_FLAG)
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if(SUPPORTS_GLINE_TABLES_ONLY_FLAG)
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list(APPEND SANITIZER_COMMON_CFLAGS -gline-tables-only)
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else()
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list(APPEND SANITIZER_COMMON_CFLAGS -g)
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endif()
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# Warnings suppressions.
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check_cxx_compiler_flag(-Wno-variadic-macros SUPPORTS_NO_VARIADIC_MACROS_FLAG)
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if(SUPPORTS_NO_VARIADIC_MACROS_FLAG)
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list(APPEND SANITIZER_COMMON_CFLAGS -Wno-variadic-macros)
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endif()
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check_cxx_compiler_flag(-Wno-c99-extensions SUPPORTS_NO_C99_EXTENSIONS_FLAG)
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if(SUPPORTS_NO_C99_EXTENSIONS_FLAG)
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list(APPEND SANITIZER_COMMON_CFLAGS -Wno-c99-extensions)
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endif()
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if(APPLE)
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list(APPEND SANITIZER_COMMON_CFLAGS -mmacosx-version-min=10.5)
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endif()
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# Because compiler-rt spends a lot of time setting up custom compile flags,
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# define a handy helper function for it. The compile flags setting in CMake
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# has serious issues that make its syntax challenging at best.
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function(set_target_compile_flags target)
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foreach(arg ${ARGN})
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set(argstring "${argstring} ${arg}")
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endforeach()
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set_property(TARGET ${target} PROPERTY COMPILE_FLAGS "${argstring}")
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endfunction()
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function(set_target_link_flags target)
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foreach(arg ${ARGN})
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set(argstring "${argstring} ${arg}")
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endforeach()
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set_property(TARGET ${target} PROPERTY LINK_FLAGS "${argstring}")
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endfunction()
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# Compute the Clang version from the LLVM version.
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# FIXME: We should be able to reuse CLANG_VERSION variable calculated
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# in Clang cmake files, instead of copying the rules here.
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string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION
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${PACKAGE_VERSION})
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# Setup the paths where compiler-rt runtimes and headers should be stored.
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set(LIBCLANG_INSTALL_PATH lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION})
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string(TOLOWER ${CMAKE_SYSTEM_NAME} LIBCLANG_OS_DIR)
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# Install compiler-rt headers.
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install(DIRECTORY include/
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DESTINATION ${LIBCLANG_INSTALL_PATH}/include
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FILES_MATCHING
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PATTERN "*.h"
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PATTERN ".svn" EXCLUDE
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)
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# Call add_clang_compiler_rt_libraries to make sure that targets are built
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# and installed in the directories where Clang driver expects to find them.
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macro(add_clang_compiler_rt_libraries)
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# Setup output directories so that clang in build tree works.
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set_target_properties(${ARGN} PROPERTIES
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ARCHIVE_OUTPUT_DIRECTORY
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${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/lib/${LIBCLANG_OS_DIR}
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LIBRARY_OUTPUT_DIRECTORY
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${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/lib/${LIBCLANG_OS_DIR}
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)
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# Add installation command.
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install(TARGETS ${ARGN}
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ARCHIVE DESTINATION ${LIBCLANG_INSTALL_PATH}/lib/${LIBCLANG_OS_DIR}
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LIBRARY DESTINATION ${LIBCLANG_INSTALL_PATH}/lib/${LIBCLANG_OS_DIR}
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)
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endmacro(add_clang_compiler_rt_libraries)
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# Add the public header's directory to the includes for all of compiler-rt.
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include_directories(include)
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add_subdirectory(lib)
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if(LLVM_INCLUDE_TESTS)
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# Currently the tests have not been ported to CMake, so disable this
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# directory.
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#
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#add_subdirectory(test)
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endif()
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