blob: b774eac6273aec89ae6551b53dd3fa257fd12501 [file] [log] [blame]
cmake_minimum_required(VERSION 3.13.4)
# Use old version of target_sources command which converts the source
# file paths to full paths.
cmake_policy(SET CMP0076 OLD)
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules")
# The top-level source directory of libc.
set(LIBC_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
# The top-level directory in which libc is being built.
set(LIBC_BUILD_DIR ${CMAKE_CURRENT_BINARY_DIR})
# Path libc/scripts directory.
set(LIBC_BUILD_SCRIPTS_DIR "${LIBC_SOURCE_DIR}/utils/build_scripts")
set(LIBC_TARGET_OS ${CMAKE_SYSTEM_NAME})
string(TOLOWER ${LIBC_TARGET_OS} LIBC_TARGET_OS)
set(LIBC_TARGET_MACHINE ${CMAKE_SYSTEM_PROCESSOR})
# Check --print-resource-dir to find the compiler resource dir if this flag
# is supported by the compiler.
execute_process(
OUTPUT_STRIP_TRAILING_WHITESPACE
COMMAND ${CMAKE_CXX_COMPILER} --print-resource-dir
RESULT_VARIABLE COMMAND_RETURN_CODE
OUTPUT_VARIABLE COMPILER_RESOURCE_DIR
)
# Retrieve the host compiler's resource dir.
if(COMMAND_RETURN_CODE EQUAL 0)
set(COMPILER_RESOURCE_DIR
"${COMPILER_RESOURCE_DIR}" CACHE PATH "path to compiler resource dir"
)
message(STATUS "Set COMPILER_RESOURCE_DIR to "
"${COMPILER_RESOURCE_DIR} using --print-resource-dir")
else()
set(COMPILER_RESOURCE_DIR OFF)
message(STATUS "COMPILER_RESOURCE_DIR not set
--print-resource-dir not supported by host compiler")
endif()
option(LLVM_LIBC_ENABLE_LINTING "Enables linting of libc source files" ON)
if(LLVM_LIBC_ENABLE_LINTING)
if("clang-tools-extra" IN_LIST LLVM_ENABLE_PROJECTS
AND "clang" IN_LIST LLVM_ENABLE_PROJECTS)
add_custom_target(lint-libc)
else()
message(FATAL_ERROR "
'clang' and 'clang-tools-extra' are required in LLVM_ENABLE_PROJECTS to
lint llvm-libc. The linting step performs important checks to help prevent
the introduction of subtle bugs, but it may increase build times.
To disable linting set LLVM_LIBC_ENABLE_LINTING to OFF
(pass -DLLVM_LIBC_ENABLE_LINTING=OFF to cmake).")
endif()
else()
message(WARNING "
Linting for libc is currently disabled.
This is not recommended, to enable set LLVM_LIBC_ENABLE_LINTING to ON
(pass -DLLVM_LIBC_ENABLE_LINTING=ON to cmake).")
endif()
include(CMakeParseArguments)
include(LLVMLibCRules)
include(LLVMLibCCheckCpuFeatures)
add_subdirectory(include)
add_subdirectory(config)
include("${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/${LIBC_TARGET_MACHINE}/entrypoints.txt")
include("${LIBC_SOURCE_DIR}/config/${LIBC_TARGET_OS}/${LIBC_TARGET_MACHINE}/headers.txt")
set(TARGET_ENTRYPOINT_NAME_LIST "")
foreach(entrypoint IN LISTS TARGET_LIBC_ENTRYPOINTS TARGET_LIBM_ENTRYPOINTS)
string(FIND ${entrypoint} "." last_dot_loc REVERSE)
if(${last_dot_loc} EQUAL -1)
message(FATAL "Invalid entrypoint target name ${entrypoint}; Expected a '.' "
"(dot) in the name.")
endif()
math(EXPR name_loc "${last_dot_loc} + 1")
string(SUBSTRING ${entrypoint} ${name_loc} -1 entrypoint_name)
list(APPEND TARGET_ENTRYPOINT_NAME_LIST ${entrypoint_name})
endforeach()
add_subdirectory(src)
add_subdirectory(utils)
# The loader can potentially depend on the library components so add it
# after the library implementation directories.
add_subdirectory(loader)
# The lib and test directories are added at the very end as tests
# and libraries potentially draw from the components present in all
# of the other directories.
add_subdirectory(lib)
if(LLVM_INCLUDE_TESTS)
add_subdirectory(test)
add_subdirectory(fuzzing)
endif()