Quash some new warnings from GCC 4.6.

ChangeLog

@@ -1,5 +1,42 @@
 2011-06-10  Roland McGrath  <roland@hack.frob.com>
 
+	* Makefile ($(common-objpfx)linkobj/libc.so): Break long lines with \.
+	Don't list ld.so twice in dependencies.
+
+	* posix/bug-regex31.c: Include <stdlib.h>.
+
+	* nscd/hstcache.c (cache_addhst): Remove unused variable.
+
+	* nis/nss_compat/compat-spwd.c
+	(getspent_next_nss_netgr): Remove unused variable.
+	* nis/nss_compat/compat-pwd.c (getpwent_next_nss_netgr): Likewise.
+
+	* nis/nis_print_group_entry.c (nis_print_group_entry): Fix "Implicit
+	nonmembers" output to use the right array.
+
+	* resolv/nss_dns/dns-network.c (getanswer_r): Remove unused variable.
+
+	* elf/dl-open.c (_dl_open): Quash warnings when DL_NNS==1.
+
+	* locale/programs/ld-ctype.c (ctype_read): Remove unused variable.
+	* locale/programs/ld-collate.c (add_to_tablewc): Likewise.
+	* catgets/gencat.c (read_input_file): Likewise.
+	* locale/programs/locarchive.c (enlarge_archive): Likewise.
+
+	* sunrpc/clnt_udp.c (__libc_clntudp_bufcreate): Move DONTBLOCK
+	variable definition inside #if's controlling its use.
+
+	* inet/getnetgrent_r.c (innetgr): Remove unused variable.
+
+	* resolv/res_hconf.c (_res_hconf_reorder_addrs): Fix errno restoration.
+
+	* misc/syslog.c (__vsyslog_chk): Remove unused variable.
+
+	* io/fts.c (fts_build): Use if (0 && ...) rather than #if 0 for
+	unreachable code.
+
+	* stdio-common/printf_fp.c (___printf_fp): Remove unused variable.
+
 	* configure.in (nss-crypt check): Use AC_LANG_PROGRAM.
 	* configure: Regenerated.
 

Makefile

@@ -138,10 +138,16 @@ lib: $(common-objpfx)libc.so
 
 lib: $(common-objpfx)linkobj/libc.so
 
-$(common-objpfx)linkobj/libc.so: $(elfobjdir)/soinit.os $(common-objpfx)linkobj/libc_pic.a $(elfobjdir)/sofini.os $(elfobjdir)/interp.os $(elfobjdir)/ld.so $(common-objpfx)shlib.lds $(common-objpfx)elf/ld.so
+$(common-objpfx)linkobj/libc.so: $(elfobjdir)/soinit.os \
+				 $(common-objpfx)linkobj/libc_pic.a \
+				 $(elfobjdir)/sofini.os \
+				 $(elfobjdir)/interp.os \
+				 $(elfobjdir)/ld.so \
+				 $(common-objpfx)shlib.lds
 	$(build-shlib)
 
-$(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a $(common-objpfx)sunrpc/librpc_compat_pic.a
+$(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a \
+				    $(common-objpfx)sunrpc/librpc_compat_pic.a
 	$(..)./scripts/mkinstalldirs $(common-objpfx)linkobj
 	(cd $(common-objpfx)linkobj; \
 	 $(AR) x ../libc_pic.a; \

catgets/gencat.c

@@ -467,7 +467,6 @@ this is the first definition"));
 	  else if (strncmp (&this_line[1], "delset", 6) == 0)
 	    {
 	      int cnt = sizeof ("delset");
-	      size_t set_number;
 	      while (isspace (this_line[cnt]))
 		++cnt;
 
@@ -489,11 +488,8 @@ this is the first definition"));
 		    ++cnt;
 
 		  if (cnt == start)
-		    {
+		    error_at_line (0, 0, fname, start_line,
-		      error_at_line (0, 0, fname, start_line,
+				   gettext ("illegal set number"));
-				     gettext ("illegal set number"));
-		      set_number = 0;
-		    }
 		  else
 		    {
 		      const char *symbol;
@@ -506,7 +502,6 @@ this is the first definition"));
 		      /* We have a symbolic set name.  This name must
 			 appear somewhere else in the catalogs read so
 			 far.  */
-		      set_number = 0;
 		      for (runp = current->all_sets; runp != NULL;
 			   runp = runp->next)
 			{
@@ -657,12 +652,10 @@ this is the first definition"));
 	  else if (ident[0] != '\0')
 	    {
 	      struct message_list *runp;
-	      struct message_list *lastp;
 
 	      /* Test whether the symbolic name was not used for
 		 another message in this message set.  */
 	      runp = current->current_set->messages;
-	      lastp = NULL;
 	      while (runp != NULL)
 		if (runp->symbol != NULL && strcmp (ident, runp->symbol) == 0)
 		  break;

elf/dl-open.c

@@ -516,7 +516,7 @@ _dl_open (const char *file, int mode, const void *caller_dlopen, Lmid_t nsid,
   if (__builtin_expect (nsid == LM_ID_NEWLM, 0))
     {
       /* Find a new namespace.  */
-      for (nsid = 1; nsid < GL(dl_nns); ++nsid)
+      for (nsid = 1; DL_NNS > 1 && nsid < GL(dl_nns); ++nsid)
 	if (GL(dl_ns)[nsid]._ns_loaded == NULL)
 	  break;
 
@@ -528,8 +528,7 @@ _dl_open (const char *file, int mode, const void *caller_dlopen, Lmid_t nsid,
 	  _dl_signal_error (EINVAL, file, NULL, N_("\
 no more namespaces available for dlmopen()"));
 	}
-
+      else if (nsid == GL(dl_nns))
-      if (nsid == GL(dl_nns))
 	{
 	  __rtld_lock_initialize (GL(dl_ns)[nsid]._ns_unique_sym_table.lock);
 	  ++GL(dl_nns);

inet/getnetgrent_r.c

@@ -1,5 +1,5 @@
-/* Copyright (C) 1996, 1997, 1998, 1999, 2002, 2004, 2005, 2007
+/* Copyright (C) 1996,1997,1998,1999,2002,2004,2005,2007,2011
-   Free Software Foundation, Inc.
+	Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -347,7 +347,6 @@ innetgr (const char *netgroup, const char *host, const char *user,
   struct __netgrent entry;
   int result = 0;
   const char *current_group = netgroup;
-  int real_entry = 0;
 
   memset (&entry, '\0', sizeof (entry));
 
@@ -404,8 +403,6 @@ innetgr (const char *netgroup, const char *host, const char *user,
 		    }
 		  else
 		    {
-		      real_entry = 1;
-
 		      if ((entry.val.triple.host == NULL || host == NULL
 			   || __strcasecmp (entry.val.triple.host, host) == 0)
 			  && (entry.val.triple.user == NULL || user == NULL

io/fts.c

@@ -748,20 +748,17 @@ mem1:				saved_errno = errno;
 			p->fts_flags |= FTS_ISW;
 #endif
 
-#if 0
 		/* Unreachable code.  cderrno is only ever set to a nonnull
 		   value if dirp is closed at the same time.  But then we
 		   cannot enter this loop.  */
-		if (cderrno) {
+		if (0 && cderrno) {
 			if (nlinks) {
 				p->fts_info = FTS_NS;
 				p->fts_errno = cderrno;
 			} else
 				p->fts_info = FTS_NSOK;
 			p->fts_accpath = cur->fts_accpath;
-		} else
+		} else if (nlinks == 0
-#endif
-		if (nlinks == 0
 #if defined DT_DIR && defined _DIRENT_HAVE_D_TYPE
 			   || (nostat &&
 			       dp->d_type != DT_DIR && dp->d_type != DT_UNKNOWN)

locale/programs/ld-collate.c

@@ -1987,7 +1987,6 @@ add_to_tablewc (uint32_t ch, struct element_t *runp)
     {
       /* As for the singlebyte table, we recognize sequences and
 	 compress them.  */
-      struct element_t *lastp;
 
       collidx_table_add (atwc.tablewc, ch,
 			 -(obstack_object_size (atwc.extrapool)
@@ -2087,7 +2086,6 @@ add_to_tablewc (uint32_t ch, struct element_t *runp)
 	    }
 
 	  /* Next entry.  */
-	  lastp = runp;
 	  runp = runp->wcnext;
 	}
       while (runp != NULL);

locale/programs/ld-ctype.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 1995-2006, 2007, 2009 Free Software Foundation, Inc.
+/* Copyright (C) 1995-2006,2007,2009,2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@gnu.org>, 1995.
 
@@ -2209,7 +2209,6 @@ ctype_read (struct linereader *ldfile, struct localedef_t *result,
   struct token *now;
   enum token_t nowtok;
   size_t cnt;
-  struct charseq *last_seq;
   uint32_t last_wch = 0;
   enum token_t last_token;
   enum token_t ellipsis_token;
@@ -2465,7 +2464,6 @@ ctype_read (struct linereader *ldfile, struct localedef_t *result,
 		    }
 		  else
 		    last_str = NULL;
-		  last_seq = seq;
 		  last_wch = wch;
 		  memcpy (last_charcode, now->val.charcode.bytes, 16);
 		  last_charcode_len = now->val.charcode.nbytes;

locale/programs/locarchive.c

@@ -300,7 +300,6 @@ enlarge_archive (struct locarhandle *ah, const struct locarhead *head)
   void *p;
   unsigned int cnt, loccnt;
   struct namehashent *oldnamehashtab;
-  struct locrecent *oldlocrectab;
   struct locarhandle new_ah;
   size_t prefix_len = output_prefix ? strlen (output_prefix) : 0;
   char archivefname[prefix_len + sizeof (ARCHIVE_NAME)];
@@ -431,8 +430,6 @@ enlarge_archive (struct locarhandle *ah, const struct locarhead *head)
      still referenced and transfer it into the new file.  */
   oldnamehashtab = (struct namehashent *) ((char *) ah->addr
 					   + head->namehash_offset);
-  oldlocrectab = (struct locrecent *) ((char *) ah->addr
-				       + head->locrectab_offset);
 
   /* Sort the old locrec table in order of data position.  */
   struct oldlocrecent oldlocrecarray[head->namehash_size];

misc/syslog.c

@@ -141,7 +141,7 @@ __vsyslog_chk(int pri, int flag, const char *fmt, va_list ap)
 	FILE *f;
 	char *buf = 0;
 	size_t bufsize = 0;
-	size_t prioff, msgoff;
+	size_t msgoff;
 #ifndef NO_SIGPIPE
  	struct sigaction action, oldaction;
  	int sigpipe;
@@ -192,7 +192,7 @@ __vsyslog_chk(int pri, int flag, const char *fmt, va_list ap)
 	else
 	  {
 	    __fsetlocking (f, FSETLOCKING_BYCALLER);
-	    prioff = fprintf (f, "<%d>", pri);
+	    fprintf (f, "<%d>", pri);
 	    (void) time (&now);
 	    f->_IO_write_ptr += __strftime_l (f->_IO_write_ptr,
 					      f->_IO_write_end

nis/nis_print_group_entry.c

@@ -1,4 +1,5 @@
-/* Copyright (c) 1997, 1998, 2000, 2004, 2006 Free Software Foundation, Inc.
+/* Copyright (c) 1997,1998,2000,2004,2006,2011
+	Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
 
@@ -156,7 +157,7 @@ nis_print_group_entry (const_nis_name group)
 	{
 	  fputs (_("    Implicit nonmembers:\n"), stdout);
 	  for (i = 0; i < nomem_imp_cnt; ++i)
-	    printf ("\t%s\n", &mem_imp[i][3]);
+	    printf ("\t%s\n", &nomem_imp[i][3]);
 	}
       else
 	fputs (_("    No implicit nonmembers\n"), stdout);

nis/nss_compat/compat-pwd.c

@@ -1,4 +1,5 @@
-/* Copyright (C) 1996-1999, 2001-2006, 2007 Free Software Foundation, Inc.
+/* Copyright (C) 1996-1999,2001-2006,2007,2011
+	Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
 
@@ -386,9 +387,6 @@ getpwent_next_nss_netgr (const char *name, struct passwd *result, ent_t *ent,
 
   while (1)
     {
-      char *saved_cursor;
-
-      saved_cursor = ent->netgrdata.cursor;
       status = __internal_getnetgrent_r (&host, &user, &domain,
 					 &ent->netgrdata, buffer, buflen,
 					 errnop);

nis/nss_compat/compat-spwd.c

@@ -1,4 +1,5 @@
-/* Copyright (C) 1996-1999, 2001-2006, 2007 Free Software Foundation, Inc.
+/* Copyright (C) 1996-1999,2001-2006,2007,2011
+	Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
 
@@ -344,10 +345,8 @@ getspent_next_nss_netgr (const char *name, struct spwd *result, ent_t *ent,
 
   while (1)
     {
-      char *saved_cursor;
       enum nss_status status;
 
-      saved_cursor = ent->netgrdata.cursor;
       status = __internal_getnetgrent_r (&host, &user, &domain,
 					 &ent->netgrdata, buffer, buflen,
 					 errnop);

nscd/hstcache.c

@@ -190,7 +190,6 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req,
       size_t h_aliases_cnt;
       uint32_t *h_aliases_len;
       size_t h_addr_list_cnt;
-      int addr_list_type;
       char *addresses;
       char *aliases;
       char *key_copy = NULL;
@@ -409,9 +408,6 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req,
 		     + total + req->key_len, MS_ASYNC);
 	    }
 
-	  addr_list_type = (hst->h_length == NS_INADDRSZ
-			    ? GETHOSTBYADDR : GETHOSTBYADDRv6);
-
 	  /* NB: the following code is really complicated.  It has
 	     seemlingly duplicated code paths which do the same.  The
 	     problem is that we always must add the hash table entry

posix/bug-regex31.c

@@ -1,6 +1,7 @@
 #include <mcheck.h>
 #include <regex.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <sys/types.h>
 
 int

resolv/nss_dns/dns-network.c

@@ -1,5 +1,5 @@
-/* Copyright (C) 1996, 1997, 1998, 1999, 2002, 2004, 2007, 2008
+/* Copyright (C) 1996,1997,1998,1999,2002,2004,2007,2008,2011
-   Free Software Foundation, Inc.
+	Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Extended from original form by Ulrich Drepper <drepper@cygnus.com>, 1996.
 
@@ -293,7 +293,6 @@ getanswer_r (const querybuf *answer, int anslen, struct netent *result,
   const unsigned char *cp = &answer->buf[HFIXEDSZ];
   char **alias_pointer;
   int have_answer;
-  char *ans;
   u_char packtmp[NS_MAXCDNAME];
 
   if (question_count == 0)
@@ -328,7 +327,6 @@ getanswer_r (const querybuf *answer, int anslen, struct netent *result,
   alias_pointer = result->n_aliases = &net_data->aliases[0];
   *alias_pointer = NULL;
   have_answer = 0;
-  ans = NULL;
 
   while (--answer_count >= 0 && cp < end_of_message)
     {
@@ -351,7 +349,6 @@ getanswer_r (const querybuf *answer, int anslen, struct netent *result,
       if (n < 0 || res_dnok (bp) == 0)
 	break;
       cp += n;
-      ans = strdupa (bp);
       GETSHORT (type, cp);
       GETSHORT (class, cp);
       cp += INT32SZ;		/* TTL */

resolv/res_hconf.c

@@ -1,4 +1,5 @@
-/* Copyright (C) 1993, 1995-2006, 2007, 2009 Free Software Foundation, Inc.
+/* Copyright (C) 1993,1995-2006,2007,2009,2011
+	Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by David Mosberger (davidm@azstarnet.com).
 
@@ -461,7 +462,7 @@ _res_hconf_reorder_addrs (struct hostent *hp)
 
 	cleanup:
 	  /* Release lock, preserve error value, and close socket.  */
-	  save = errno;
+	  errno = save;
 
 	  num_ifs = new_num_ifs;
 

stdio-common/printf_fp.c

@@ -640,7 +640,6 @@ ___printf_fp (FILE *fp,
       int exp10 = 0;
       int explog = LDBL_MAX_10_EXP_LOG;
       const struct mp_power *powers = &_fpioconst_pow10[explog + 1];
-      mp_size_t used_limbs = fracsize - 1;
 
       /* Now shift the input value to its right place.	*/
       cy = __mpn_lshift (frac, fp_input, fracsize, to_shift);
@@ -762,7 +761,6 @@ ___printf_fp (FILE *fp,
 			  fracsize = tmpsize - (i - 1);
 			}
 		    }
-		  used_limbs = fracsize - 1;
 		}
 	    }
 	  --explog;

sunrpc/clnt_udp.c

@@ -172,8 +172,6 @@ __libc_clntudp_bufcreate (struct sockaddr_in *raddr, u_long program,
   cu->cu_xdrpos = XDR_GETPOS (&(cu->cu_outxdrs));
   if (*sockp < 0)
     {
-      int dontblock = 1;
-
 #ifdef SOCK_NONBLOCK
 # ifndef __ASSUME_SOCK_CLOEXEC
       if (__have_sock_cloexec >= 0)
@@ -212,8 +210,11 @@ __libc_clntudp_bufcreate (struct sockaddr_in *raddr, u_long program,
 # ifdef SOCK_CLOEXEC
       if (__have_sock_cloexec < 0)
 # endif
-	/* the sockets rpc controls are non-blocking */
+	{
-	(void) __ioctl (*sockp, FIONBIO, (char *) &dontblock);
+	  /* the sockets rpc controls are non-blocking */
+	  int dontblock = 1;
+	  (void) __ioctl (*sockp, FIONBIO, (char *) &dontblock);
+	}
 #endif
 #ifdef IP_RECVERR
       {