forked from OSchip/llvm-project
140 lines
5.2 KiB
CMake
140 lines
5.2 KiB
CMake
cmake_minimum_required(VERSION 3.13.4)
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# Use old version of target_sources command which converts the source
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# file paths to full paths.
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cmake_policy(SET CMP0076 OLD)
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list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules")
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# The top-level sourse and binary directories.
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set(LIBC_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
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set(LIBC_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
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# The top-level directory in which libc is being built.
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set(LIBC_BUILD_DIR ${CMAKE_CURRENT_BINARY_DIR})
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# Path libc/scripts directory.
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set(LIBC_BUILD_SCRIPTS_DIR "${LIBC_SOURCE_DIR}/utils/build_scripts")
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set(LIBC_TARGET_OS ${CMAKE_SYSTEM_NAME})
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string(TOLOWER ${LIBC_TARGET_OS} LIBC_TARGET_OS)
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# Defines LIBC_TARGET_ARCHITECTURE and associated macros.
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include(LLVMLibCArchitectures)
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include(LLVMLibCCheckMPFR)
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# Flags to pass down to the compiler while building the libc functions.
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set(LIBC_COMPILE_OPTIONS_DEFAULT "" CACHE STRING "Architecture to tell clang to optimize for (e.g. -march=... or -mcpu=...)")
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# Check --print-resource-dir to find the compiler resource dir if this flag
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# is supported by the compiler.
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execute_process(
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OUTPUT_STRIP_TRAILING_WHITESPACE
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COMMAND ${CMAKE_CXX_COMPILER} --print-resource-dir
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RESULT_VARIABLE COMMAND_RETURN_CODE
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OUTPUT_VARIABLE COMPILER_RESOURCE_DIR
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)
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# Retrieve the host compiler's resource dir.
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if(COMMAND_RETURN_CODE EQUAL 0)
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set(COMPILER_RESOURCE_DIR
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"${COMPILER_RESOURCE_DIR}" CACHE PATH "path to compiler resource dir"
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)
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message(STATUS "Set COMPILER_RESOURCE_DIR to "
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"${COMPILER_RESOURCE_DIR} using --print-resource-dir")
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else()
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set(COMPILER_RESOURCE_DIR OFF)
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message(STATUS "COMPILER_RESOURCE_DIR not set
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--print-resource-dir not supported by host compiler")
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endif()
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option(LLVM_LIBC_FULL_BUILD "Build and test LLVM libc as if it is the full libc" OFF)
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option(LLVM_LIBC_ENABLE_LINTING "Enables linting of libc source files" OFF)
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if(LLVM_LIBC_ENABLE_LINTING AND (NOT LLVM_LIBC_FULL_BUILD))
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message(FATAL_ERROR "Cannot enable linting when full libc build is not enabled.")
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endif()
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if(LLVM_LIBC_ENABLE_LINTING)
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if("clang-tools-extra" IN_LIST LLVM_ENABLE_PROJECTS
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AND "clang" IN_LIST LLVM_ENABLE_PROJECTS)
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add_custom_target(lint-libc)
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else()
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message(FATAL_ERROR "
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'clang' and 'clang-tools-extra' are required in LLVM_ENABLE_PROJECTS to
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lint llvm-libc. The linting step performs important checks to help prevent
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the introduction of subtle bugs, but it may increase build times.
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To disable linting set LLVM_LIBC_ENABLE_LINTING to OFF
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(pass -DLLVM_LIBC_ENABLE_LINTING=OFF to cmake).")
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endif()
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elseif(LLVM_LIBC_FULL_BUILD)
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message(WARNING "
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Linting for libc is currently disabled.
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This is not recommended, to enable set LLVM_LIBC_ENABLE_LINTING to ON
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(pass -DLLVM_LIBC_ENABLE_LINTING=ON to cmake).")
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endif()
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option(LLVM_LIBC_INCLUDE_SCUDO "Include the SCUDO standalone as the allocator for LLVM libc" OFF)
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if(LLVM_LIBC_INCLUDE_SCUDO)
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if (NOT "compiler-rt" IN_LIST LLVM_ENABLE_PROJECTS)
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message(FATAL_ERROR "SCUDO cannot be included without adding compiler-rt to LLVM_ENABLE_PROJECTS")
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endif()
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endif()
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include(CMakeParseArguments)
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include(LLVMLibCRules)
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include(LLVMLibCCheckCpuFeatures)
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if(EXISTS "${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/${LIBC_TARGET_ARCHITECTURE}/entrypoints.txt")
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set(entrypoint_file "${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/${LIBC_TARGET_ARCHITECTURE}/entrypoints.txt")
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elseif(EXISTS "${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/entrypoints.txt")
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set(entrypoint_file "${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/entrypoints.txt")
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else()
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message(FATAL_ERROR "entrypoints.txt file for the target platform not found.")
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endif()
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include(${entrypoint_file})
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if(EXISTS "${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/${LIBC_TARGET_ARCHITECTURE}/headers.txt")
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include("${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/${LIBC_TARGET_ARCHITECTURE}/headers.txt")
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elseif(EXISTS "${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/headers.txt")
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include("${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}//headers.txt")
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endif()
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set(TARGET_ENTRYPOINT_NAME_LIST "")
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foreach(entrypoint IN LISTS TARGET_LLVMLIBC_ENTRYPOINTS)
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string(FIND ${entrypoint} "." last_dot_loc REVERSE)
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if(${last_dot_loc} EQUAL -1)
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message(FATAL "Invalid entrypoint target name ${entrypoint}; Expected a '.' "
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"(dot) in the name.")
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endif()
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math(EXPR name_loc "${last_dot_loc} + 1")
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string(SUBSTRING ${entrypoint} ${name_loc} -1 entrypoint_name)
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list(APPEND TARGET_ENTRYPOINT_NAME_LIST ${entrypoint_name})
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endforeach()
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if(LLVM_LIBC_FULL_BUILD)
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# We need to set up hdrgen first since other targets depend on it.
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add_subdirectory(utils/LibcTableGenUtil)
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add_subdirectory(utils/HdrGen)
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endif()
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add_subdirectory(include)
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add_subdirectory(config)
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add_subdirectory(src)
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add_subdirectory(utils)
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if(LLVM_LIBC_FULL_BUILD)
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# The loader can potentially depend on the library components so add it
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# after the library implementation directories.
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add_subdirectory(loader)
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endif()
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# The lib and test directories are added at the very end as tests
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# and libraries potentially draw from the components present in all
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# of the other directories.
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add_subdirectory(lib)
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if(LLVM_INCLUDE_TESTS)
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add_subdirectory(test)
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add_subdirectory(fuzzing)
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endif()
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add_subdirectory(benchmarks)
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