cmake KWSYS_CXX_HAS_GETLOADAVG examples

Kitware/VTK Utilities/KWSys/vtksys/CMakeLists.txt :594 

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

InsightSoftwareConsortium/ITK Modules/ThirdParty/KWSys/src/KWSys/CMakeLists.txt :566 

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

Kitware/kwiver vital/kwiversys/CMakeLists.txt :693 

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

ornladios/ADIOS2 thirdparty/KWSys/adios2sys/CMakeLists.txt :574 

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