mirror of
https://github.com/oxen-io/lokinet.git
synced 2024-11-15 12:13:24 +00:00
50 lines
1.6 KiB
CMake
50 lines
1.6 KiB
CMake
function(check_working_cxx_atomics64 varname)
|
|
set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
|
|
if (EMBEDDED_CFG)
|
|
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -m32 -march=i486")
|
|
elseif(MSVC OR MSVC_VERSION)
|
|
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -arch:IA32 -std:c++14")
|
|
else()
|
|
# CMAKE_CXX_STANDARD does not propagate to cmake compile tests
|
|
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -std=c++14")
|
|
endif()
|
|
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 0;
|
|
}
|
|
" ${varname})
|
|
set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
|
|
endfunction()
|
|
|
|
function(link_libatomic)
|
|
check_working_cxx_atomics64(HAVE_CXX_ATOMICS64_WITHOUT_LIB)
|
|
|
|
if(HAVE_CXX_ATOMICS64_WITHOUT_LIB)
|
|
message(STATUS "Have working 64bit atomics")
|
|
return()
|
|
endif()
|
|
|
|
if (NOT MSVC AND NOT MSVC_VERSION)
|
|
check_library_exists(atomic __atomic_load_8 "" HAVE_CXX_LIBATOMICS64)
|
|
if (HAVE_CXX_LIBATOMICS64)
|
|
message(STATUS "Have 64bit atomics via library")
|
|
list(APPEND CMAKE_REQUIRED_LIBRARIES "atomic")
|
|
check_working_cxx_atomics64(HAVE_CXX_ATOMICS64_WITH_LIB)
|
|
if (HAVE_CXX_ATOMICS64_WITH_LIB)
|
|
message(STATUS "Can link with libatomic")
|
|
link_libraries(-latomic)
|
|
return()
|
|
endif()
|
|
endif()
|
|
endif()
|
|
if (MSVC OR MSVC_VERSION)
|
|
message(FATAL_ERROR "Host compiler must support 64-bit std::atomic! (What does MSVC do to inline atomics?)")
|
|
else()
|
|
message(FATAL_ERROR "Host compiler must support 64-bit std::atomic!")
|
|
endif()
|
|
endfunction()
|