6648 illumos build should be explicit about C standards

*** 64,74 ****
  install: all $(DIRS) $(ROOTTZSRCD) $(ROOTTZTABD) $(ROOTUSRSBINPROG) \
                  $(ROOTLIBTZSRCFILES) $(ROOTLIBTZTABFILES) $(ROOTKSHPROG)
          $(NPROG) -d $(ROOTTZD) $(TZFILES)
  
  $(NPROG): $(NATIVE) $(NOBJS)
!         $(NATIVECC) -o $@ $(NOBJS)
  
  #
  # XXX
  # There is a .ksh rule in Makefile.targ, but we need our custom POFILE rules.
  #
--- 64,74 ----
  install: all $(DIRS) $(ROOTTZSRCD) $(ROOTTZTABD) $(ROOTUSRSBINPROG) \
                  $(ROOTLIBTZSRCFILES) $(ROOTLIBTZTABFILES) $(ROOTKSHPROG)
          $(NPROG) -d $(ROOTTZD) $(TZFILES)
  
  $(NPROG): $(NATIVE) $(NOBJS)
!         $(NATIVECC) $(NATIVE_CFLAGS) -o $@ $(NOBJS)
  
  #
  # XXX
  # There is a .ksh rule in Makefile.targ, but we need our custom POFILE rules.
  #
*** 93,112 ****
          $(RM) $(OBJS)
  
  lint: lint_SRCS
  
  $(NOBJS): $$(@F:.o=.c)
!         $(NATIVECC) -O $(NCPPFLAGS) -c -o $@ $(@F:.o=.c)
  
  $(NATIVE)/zic.o: $(NATIVE)/tzfile.h
  
- #$(NATIVE)/scheck.o: scheck.c
- #       $(NATIVECC) -c -o $@ scheck.c
- 
- #$(NATIVE)/ialloc.o: ialloc.c
- #       $(NATIVECC) -c -o $@ ialloc.c
- 
  $(NATIVE)/tzfile.h: $(ROOT)/usr/include/tzfile.h
          $(RM) $@; cp $(ROOT)/usr/include/tzfile.h $@
  
  #
  # From ../Makefile.targ
--- 93,106 ----
          $(RM) $(OBJS)
  
  lint: lint_SRCS
  
  $(NOBJS): $$(@F:.o=.c)
!         $(NATIVECC) -O $(NATIVE_CFLAGS) $(NCPPFLAGS) -c -o $@ $(@F:.o=.c)
  
  $(NATIVE)/zic.o: $(NATIVE)/tzfile.h
  
  $(NATIVE)/tzfile.h: $(ROOT)/usr/include/tzfile.h
          $(RM) $@; cp $(ROOT)/usr/include/tzfile.h $@
  
  #
  # From ../Makefile.targ