cmake KWSYS_SYSTEMINFORMATION_HAS_BACKTRACE examples

Kitware/VTK Utilities/KWSys/vtksys/CMakeLists.txt :543 

set_property(SOURCE SystemInformation.cxx APPEND PROPERTY
          COMPILE_DEFINITIONS KWSYS_SYSTEMINFORMATION_HAS_BACKTRACE=1)

InsightSoftwareConsortium/ITK Modules/ThirdParty/KWSys/src/KWSys/CMakeLists.txt :515 

set_property(SOURCE SystemInformation.cxx APPEND PROPERTY
          COMPILE_DEFINITIONS KWSYS_SYSTEMINFORMATION_HAS_BACKTRACE=1)

Kitware/kwiver vital/kwiversys/CMakeLists.txt :612 

SET_PROPERTY(SOURCE SystemInformation.cxx APPEND PROPERTY
          COMPILE_DEFINITIONS KWSYS_SYSTEMINFORMATION_HAS_BACKTRACE=1)

ornladios/ADIOS2 thirdparty/KWSys/adios2sys/CMakeLists.txt :523 

set_property(SOURCE SystemInformation.cxx APPEND PROPERTY
          COMPILE_DEFINITIONS KWSYS_SYSTEMINFORMATION_HAS_BACKTRACE=1)