The (new) daemon rpc.rstatd needs access to certain routines in /lib/libproc.so.*. In addition, certain structures commonly accessed through kvm on BSD machines could/should be moved from rpc.rstatd to procps in order to simplify porting iostat/vmstat like programs from BSD like systems.
Under consideration for procps 1.9/2.0
Depends on installing something like /usr/include/proc/* header files and having a real published interface. The header files and real published interface have been a goal for a long time... We did not have time to get it done for 2.0 I haven't decided whether the porting structs belong or not.
This has been resoved in the rstatd build.