2019-10-05 01:30:54 +08:00
|
|
|
cmake_minimum_required(VERSION 3.4.3)
|
|
|
|
|
2020-01-27 13:50:27 +08:00
|
|
|
# Use old version of target_sources command which converts the source
|
|
|
|
# file paths to full paths.
|
|
|
|
cmake_policy(SET CMP0076 OLD)
|
2019-10-05 01:30:54 +08:00
|
|
|
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})
|
|
|
|
|
|
|
|
include(CMakeParseArguments)
|
|
|
|
include(LLVMLibCRules)
|
[libc] Adding memcpy implementation for x86_64
Summary:
The patch is not ready yet and is here to discuss a few options:
- How do we customize the implementation? (i.e. how to define `kRepMovsBSize`),
- How do we specify custom compilation flags? (We'd need `-fno-builtin-memcpy` to be passed in),
- How do we build? We may want to test in debug but build the libc with `-march=native` for instance,
- Clang has a brand new builtin `__builtin_memcpy_inline` which makes the implementation easy and efficient, but:
- If we compile with `gcc` or `msvc` we can't use it, resorting on less efficient code generation,
- With gcc we can use `__builtin_memcpy` but then we'd need a postprocess step to check that the final assembly do not contain call to `memcpy` (unlikely but allowed),
- For msvc we'd need to resort on the compiler optimization passes.
Reviewers: sivachandra, abrachet
Subscribers: mgorny, MaskRay, tschuett, libc-commits, courbet
Tags: #libc-project
Differential Revision: https://reviews.llvm.org/D74397
2020-02-11 20:37:02 +08:00
|
|
|
include(LLVMLibCCheckCpuFeatures)
|
2019-10-05 01:30:54 +08:00
|
|
|
|
|
|
|
add_subdirectory(src)
|
2019-12-05 15:17:14 +08:00
|
|
|
add_subdirectory(config)
|
|
|
|
add_subdirectory(include)
|
2019-11-06 03:40:26 +08:00
|
|
|
add_subdirectory(utils)
|
2020-01-04 04:00:45 +08:00
|
|
|
|
2020-03-19 03:46:33 +08:00
|
|
|
# The loader can potentially depend on the library components so add it
|
|
|
|
# after the library implementation directories.
|
|
|
|
add_subdirectory(loader)
|
|
|
|
|
2020-01-04 04:00:45 +08:00
|
|
|
# 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)
|
2020-03-23 13:50:16 +08:00
|
|
|
if(LLVM_INCLUDE_TESTS)
|
|
|
|
add_subdirectory(test)
|
|
|
|
add_subdirectory(fuzzing)
|
|
|
|
endif()
|