9852 enable ld(1) guidance and deflib assertions for the illumos build

*** 83,87 ****
--- 83,88 ----
  CSTD=           $(CSTD_GNU99)
  
  CPPFLAGS +=     -DOSNAME="\"illumos\"" -D_FILE_OFFSET_BITS=64
  
  LDLIBS +=       -lz
+ ADJUNCT_LIBS += libz.so