cmake HAVE_CXX_ATOMICS_WITHOUT_LIB examples

RawTherapee/RawTherapee cmake/modules/FindATOMIC.cmake :19 

check_cxx_source_compiles("${ATOMIC_CXX_TEST_SOURCE}" HAVE_CXX_ATOMICS_WITHOUT_LIB)

Warzone2100/warzone2100 cmake/CheckAtomic.cmake :54 

elseif(HAVE_CXX_ATOMICS_WITHOUT_LIB)