mirror of https://github.com/pvnis/srsRAN_4G.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
3.0 KiB
CMake
92 lines
3.0 KiB
CMake
4 years ago
|
#
|
||
|
|
# Copyright 2013-2021 Software Radio Systems Limited
|
||
|
|
#
|
||
|
|
# By using this file, you agree to the terms and conditions set
|
||
|
|
# forth in the LICENSE file which can be found at the top level of
|
||
|
|
# the distribution.
|
||
|
|
#
|
||
|
|
|
||
|
|
# Adopted from https://github.com/pothosware/SoapyRTLSDR
|
||
|
|
# Copyright: 2015, Charles J. Cliffe
|
||
|
|
# License: MIT
|
||
|
|
|
||
|
|
# - Try to find if atomics need -latomic linking
|
||
|
|
# Once done this will define
|
||
|
|
# HAVE_CXX_ATOMICS_WITHOUT_LIB - Wether atomic types work without -latomic
|
||
|
|
# HAVE_CXX_ATOMICS64_WITHOUT_LIB - Wether 64 bit atomic types work without -latomic
|
||
|
|
|
||
|
|
INCLUDE(CheckCXXSourceCompiles)
|
||
|
|
INCLUDE(CheckLibraryExists)
|
||
|
|
|
||
|
|
# Sometimes linking against libatomic is required for atomic ops, if
|
||
|
|
# the platform doesn't support lock-free atomics.
|
||
|
|
|
||
|
|
function(check_working_cxx_atomics varname)
|
||
|
|
set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
|
||
|
|
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -std=c++11")
|
||
|
|
CHECK_CXX_SOURCE_COMPILES("
|
||
|
|
#include <atomic>
|
||
|
|
std::atomic<int> x;
|
||
|
|
int main() {
|
||
|
|
return std::atomic_is_lock_free(&x);
|
||
|
|
}
|
||
|
|
" ${varname})
|
||
|
|
set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
|
||
|
|
endfunction(check_working_cxx_atomics)
|
||
|
|
|
||
|
|
function(check_working_cxx_atomics64 varname)
|
||
|
|
set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
|
||
|
|
set(CMAKE_REQUIRED_FLAGS "-std=c++11 ${CMAKE_REQUIRED_FLAGS}")
|
||
|
|
CHECK_CXX_SOURCE_COMPILES("
|
||
|
|
#include <atomic>
|
||
|
|
#include <cstdint>
|
||
|
|
std::atomic<uint64_t> x (0);
|
||
|
|
int main() {
|
||
|
|
uint64_t i = x.load(std::memory_order_relaxed);
|
||
|
|
return std::atomic_is_lock_free(&x);
|
||
|
|
}
|
||
|
|
" ${varname})
|
||
|
|
set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
|
||
|
|
endfunction(check_working_cxx_atomics64)
|
||
|
|
|
||
|
|
# Check for atomic operations.
|
||
|
|
if(MSVC)
|
||
|
|
# This isn't necessary on MSVC.
|
||
|
|
set(HAVE_CXX_ATOMICS_WITHOUT_LIB True)
|
||
|
|
else()
|
||
|
|
# First check if atomics work without the library.
|
||
|
|
check_working_cxx_atomics(HAVE_CXX_ATOMICS_WITHOUT_LIB)
|
||
|
|
endif()
|
||
|
|
|
||
|
|
# If not, check if the library exists, and atomics work with it.
|
||
|
|
if(NOT HAVE_CXX_ATOMICS_WITHOUT_LIB)
|
||
|
|
check_library_exists(atomic __atomic_fetch_add_4 "" HAVE_LIBATOMIC)
|
||
|
|
if(NOT HAVE_LIBATOMIC)
|
||
|
|
message(STATUS "Host compiler appears to require libatomic, but cannot locate it.")
|
||
|
|
endif()
|
||
|
|
list(APPEND CMAKE_REQUIRED_LIBRARIES "atomic")
|
||
|
|
check_working_cxx_atomics(HAVE_CXX_ATOMICS_WITH_LIB)
|
||
|
|
if (NOT HAVE_CXX_ATOMICS_WITH_LIB)
|
||
|
|
message(FATAL_ERROR "Host compiler must support std::atomic!")
|
||
|
|
endif()
|
||
|
|
endif()
|
||
|
|
|
||
|
|
# Check for 64 bit atomic operations.
|
||
|
|
if(MSVC)
|
||
|
|
set(HAVE_CXX_ATOMICS64_WITHOUT_LIB True)
|
||
|
|
else()
|
||
|
|
check_working_cxx_atomics64(HAVE_CXX_ATOMICS64_WITHOUT_LIB)
|
||
|
|
endif()
|
||
|
|
|
||
|
|
# If not, check if the library exists, and atomics work with it.
|
||
|
|
if(NOT HAVE_CXX_ATOMICS64_WITHOUT_LIB)
|
||
|
|
check_library_exists(atomic __atomic_load_8 "" HAVE_LIBATOMIC64)
|
||
|
|
if(NOT HAVE_LIBATOMIC64)
|
||
|
|
message(STATUS "Host compiler appears to require libatomic, but cannot locate it.")
|
||
|
|
endif()
|
||
|
|
list(APPEND CMAKE_REQUIRED_LIBRARIES "atomic")
|
||
|
|
check_working_cxx_atomics64(HAVE_CXX_ATOMICS64_WITH_LIB)
|
||
|
|
if (NOT HAVE_CXX_ATOMICS64_WITH_LIB)
|
||
|
|
message(FATAL_ERROR "Host compiler must support std::atomic!")
|
||
|
|
endif()
|
||
|
|
endif()
|