forked from OSchip/llvm-project
204 lines
7.0 KiB
CMake
204 lines
7.0 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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# 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 ${CMAKE_SYSTEM_NAME} LIBCLANG_OS_DIR)
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set(COMPILER_RT_LIBRARY_OUTPUT_DIR
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${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/lib/${LIBCLANG_OS_DIR})
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set(COMPILER_RT_LIBRARY_INSTALL_DIR
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${LIBCLANG_INSTALL_PATH}/lib/${LIBCLANG_OS_DIR})
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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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include(AddCompilerRT)
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set(COMPILER_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
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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_64_BIT_CFLAGS "-m64")
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set(TARGET_32_BIT_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_64_BIT_CFLAGS "")
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set(TARGET_32_BIT_CFLAGS "-m32")
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endif()
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# List of architectures we can target.
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set(COMPILER_RT_SUPPORTED_ARCH)
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function(get_target_flags_for_arch arch out_var)
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list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
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if(ARCH_INDEX EQUAL -1)
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message(FATAL_ERROR "Unsupported architecture: ${arch}")
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else()
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set(${out_var} ${TARGET_${arch}_CFLAGS} PARENT_SCOPE)
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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_SOURCE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/simple.c)
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file(WRITE ${SIMPLE_SOURCE} "#include <stdlib.h>\nint main() {}")
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# test_target_arch(<arch> <target flags...>)
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# Sets the target flags for a given architecture and determines if this
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# architecture is supported by trying to build a simple file.
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macro(test_target_arch arch)
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set(TARGET_${arch}_CFLAGS ${ARGN})
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try_compile(CAN_TARGET_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE}
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COMPILE_DEFINITIONS "${TARGET_${arch}_CFLAGS}"
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CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS:STRING=${TARGET_${arch}_CFLAGS}")
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if(${CAN_TARGET_${arch}})
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list(APPEND COMPILER_RT_SUPPORTED_ARCH ${arch})
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endif()
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endmacro()
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if("${LLVM_NATIVE_ARCH}" STREQUAL "X86")
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test_target_arch(x86_64 ${TARGET_64_BIT_CFLAGS})
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test_target_arch(i386 ${TARGET_32_BIT_CFLAGS})
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elseif("${LLVM_NATIVE_ARCH}" STREQUAL "PowerPC")
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# Explicitly set -m flag on powerpc, because on ppc64 defaults for gcc and
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# clang are different.
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test_target_arch(powerpc64 "-m64")
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test_target_arch(powerpc "-m32")
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endif()
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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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list(FIND COMPILER_RT_SUPPORTED_ARCH ${arch} ARCH_INDEX)
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if(NOT (ARCH_INDEX EQUAL -1) AND CAN_TARGET_${arch})
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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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# Architectures supported by Sanitizer runtimes. Specific sanitizers may
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# support only subset of these (e.g. TSan works on x86_64 only).
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filter_available_targets(SANITIZER_COMMON_SUPPORTED_ARCH
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x86_64 i386 powerpc64 powerpc)
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file(GLOB_RECURSE COMPILER_RT_HEADERS
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RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}/include"
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"include/*.h")
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set(output_dir ${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/include)
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if(MSVC_IDE OR XCODE)
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set(other_output_dir ${LLVM_BINARY_DIR}/bin/lib/clang/${CLANG_VERSION}/include)
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endif()
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# Copy compiler-rt headers to the build tree.
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set(out_files)
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foreach( f ${COMPILER_RT_HEADERS} )
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set( src ${CMAKE_CURRENT_SOURCE_DIR}/include/${f} )
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set( dst ${output_dir}/${f} )
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add_custom_command(OUTPUT ${dst}
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DEPENDS ${src}
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COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${dst}
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COMMENT "Copying compiler-rt's ${f}...")
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list(APPEND out_files ${dst})
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if(other_output_dir)
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set(other_dst ${other_output_dir}/${f})
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add_custom_command(OUTPUT ${other_dst}
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DEPENDS ${src}
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COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${other_dst}
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COMMENT "Copying compiler-rt's ${f}...")
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list(APPEND out_files ${other_dst})
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endif()
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endforeach( f )
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add_custom_target(compiler-rt-headers ALL DEPENDS ${out_files})
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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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# 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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