cmake BACKWARD_HAS_UNWIND examples

longturn/freeciv21 utility/CMakeLists.txt :54 

list(APPEND BACKWARD_DEFINES BACKWARD_HAS_UNWIND=${BACKWARD_HAS_UNWIND})

Tulip-Dev/tulip thirdparty/OGDF/cmake/ogdf.cmake :164 

elseif(BACKWARD_HAS_UNWIND)

Tulip-Dev/tulip thirdparty/OGDF/cmake/ogdf.cmake :172 

elseif(BACKWARD_HAS_UNWIND)