5910 libnisdb won't build with modern GCC

*** 17,26 ****
--- 17,27 ----
  # information: Portions Copyright [yyyy] [name of copyright owner]
  #
  # CDDL HEADER END
  #
  #
+ # Copyright 2015 Gary Mills
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
  #
  
*** 132,153 ****
                  nis_parse_ldap_util.o
  LARGEPICS=      $(LARGESYMS:%=pics/%)
  $(LARGEPICS) := sparc_C_PICFLAGS = $(C_BIGPICFLAGS)
  $(LARGEPICS) := i386_C_PICFLAGS = $(C_BIGPICFLAGS)
  
  CPPFLAGS +=     -D_REENTRANT
  
! CERRWARN +=     -_gcc=-Wno-unused-variable
! CERRWARN +=     -_gcc=-Wno-unused-value
  CERRWARN +=     -_gcc=-Wno-uninitialized
- CERRWARN +=     -_gcc=-Wno-implicit-function-declaration
  CERRWARN +=     -_gcc=-Wno-switch
- CERRWARN +=     -_gcc=-Wno-parentheses
  
  # Extra includes, from yp, for yptol files.
  CPPFLAGS += -I$(SRC)/cmd/ypcmd
  
  LIBS = $(DYNLIB)
  ZDEFS=
  LDLIBS += -lnsl -lldap -lc
  
  # A number of interfaces are interposed by numerous applications, therefore
--- 133,180 ----
                  nis_parse_ldap_util.o
  LARGEPICS=      $(LARGESYMS:%=pics/%)
  $(LARGEPICS) := sparc_C_PICFLAGS = $(C_BIGPICFLAGS)
  $(LARGEPICS) := i386_C_PICFLAGS = $(C_BIGPICFLAGS)
  
+ # More and stricter semantic checks and lint-like checks
+ CFLAGS  +=      $(CCVERBOSE)
+ 
  CPPFLAGS +=     -D_REENTRANT
  
! # Have an unused variable that can't be removed
! UVAR_PICS = \
! pics/db_dictionary_c_xdr.o \
! pics/db_dictlog_c_xdr.o \
! pics/db_entry_c_xdr.o \
! pics/db_index_c_xdr.o \
! pics/db_item_c_xdr.o \
! pics/db_log_entry_c_xdr.o \
! pics/db_mindex_c_xdr.o \
! pics/db_query_c_xdr.o \
! pics/db_scheme_c_xdr.o \
! pics/db_table_c_xdr.o \
! pics/db_vers_c_xdr.o \
! pics/ldap_xdr.o \
! pics/dit_access.o \
! pics/update.o \
! pics/yptol_utils.o \
! pics/map_ctrl.o
! 
! $(UVAR_PICS) := CERRWARN += -_gcc=-Wno-unused-variable
! 
! # Correcting these might alter logic
  CERRWARN +=     -_gcc=-Wno-uninitialized
  CERRWARN +=     -_gcc=-Wno-switch
  
  # Extra includes, from yp, for yptol files.
  CPPFLAGS += -I$(SRC)/cmd/ypcmd
  
+ # Need the path to nis_clnt.h
+ CLNT_PICS = pics/db_entry_c_xdr.o pics/ldap_xdr.o pics/db_mindex_c_xdr.o
+ 
+ $(CLNT_PICS) := CPPFLAGS += -I../libnsl/nis/gen
+ 
  LIBS = $(DYNLIB)
  ZDEFS=
  LDLIBS += -lnsl -lldap -lc
  
  # A number of interfaces are interposed by numerous applications, therefore