cmake LIBCXX_HAS_ATOMIC_LIB examples

Lewuathe/mlir-hello thirdparty/llvm-project/libcxx/cmake/config-ix.cmake :120 

check_library_exists(atomic __atomic_fetch_add_8 "" LIBCXX_HAS_ATOMIC_LIB)

Lewuathe/mlir-hello thirdparty/llvm-project/libcxx/cmake/config-ix.cmake :132 

check_library_exists(atomic __atomic_fetch_add_8 "" LIBCXX_HAS_ATOMIC_LIB)

PlatONnetwork/pWASM libc++/libcxx/cmake/Modules/CheckLibcxxAtomic.cmake :35 

check_library_exists(atomic __atomic_fetch_add_8 "" LIBCXX_HAS_ATOMIC_LIB)

CTSRD-CHERI/cheribsd contrib/subrepo-cheri-libc++/cmake/config-ix.cmake :126 

check_library_exists(atomic __atomic_fetch_add_8 "" LIBCXX_HAS_ATOMIC_LIB)

CTSRD-CHERI/cheribsd contrib/subrepo-cheri-libc++/cmake/config-ix.cmake :132 

check_library_exists(atomic __atomic_fetch_add_8 "" LIBCXX_HAS_ATOMIC_LIB)