R                 486 gc/dbg_mlc.c   	--> GC_ADD_CALLER not implemented for K&R C
R                 514 gc/dbg_mlc.c   	--> GC_ADD_CALLER not implemented for K&R C
R                 542 gc/dbg_mlc.c   	--> GC_ADD_CALLER not implemented for K&R C
R                1481 src/stdlib.c     SCM_SET_C##PRE##R(cell, value); SCM_RETURN(SCM_UNDEFINED);