cmake DAPR_HAVE_IPV6 examples

numenta/nupic.core-legacy external/Apr1Lib.cmake :74

ExternalProject_Add(Apr1StaticLib
        URL ${aprlib_url}

        UPDATE_COMMAND ""
        PATCH_COMMAND ""

        CMAKE_GENERATOR ${CMAKE_GENERATOR}

        # TODO Figure out what to do with INSTALL_PDB. We disabled it because
        # our manual INSTALL_COMMAND was not finding the pdb file and failing.
        CMAKE_ARGS -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
            -DBUILD_SHARED_LIBS=OFF
            -DAPR_HAVE_IPV6=OFF
            -DCMAKE_C_FLAGS=${aprlib_cflags}
            -DCMAKE_INSTALL_PREFIX=${aprlib_install_prefix}
            -DINSTALL_PDB=OFF


        #LOG_INSTALL 1
    )