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# We can't create the same interface imported target multiple times, CMake will complain if we do
# that. This can happen if the find_package call is done in multiple different subdirectories.
if(TARGET WrapAtomic::WrapAtomic)
set(WrapAtomic_FOUND ON)
return()
endif()
include(CheckCXXSourceCompiles)
set (atomic_test_sources "#include <atomic>
#include <cstdint>
int main(int, char **)
{
volatile std::atomic<char> size_1;
volatile std::atomic<short> size_2;
volatile std::atomic<int> size_4;
volatile std::atomic<int64_t> size_8;
++size_1;
++size_2;
++size_4;
++size_8;
(void)size_1.load(std::memory_order_relaxed);
(void)size_2.load(std::memory_order_relaxed);
(void)size_4.load(std::memory_order_relaxed);
(void)size_8.load(std::memory_order_relaxed);
return 0;
}")
check_cxx_source_compiles("${atomic_test_sources}" HAVE_STDATOMIC)
if(NOT HAVE_STDATOMIC)
set(_req_libraries "${CMAKE_REQUIRED_LIBRARIES}")
set(atomic_LIB "-latomic")
set(CMAKE_REQUIRED_LIBRARIES ${atomic_LIB})
check_cxx_source_compiles("${atomic_test_sources}" HAVE_STDATOMIC_WITH_LIB)
set(CMAKE_REQUIRED_LIBRARIES "${_req_libraries}")
endif()
add_library(WrapAtomic::WrapAtomic INTERFACE IMPORTED)
if(HAVE_STDATOMIC_WITH_LIB)
# atomic_LIB is already found above.
target_link_libraries(WrapAtomic::WrapAtomic INTERFACE ${atomic_LIB})
endif()
set(WrapAtomic_FOUND 1)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(WrapAtomic DEFAULT_MSG WrapAtomic_FOUND)
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