Upstream-Status: Backport

Remove unused variables from the code to prevent -Werror causing a build
failure on hosts with GCC 4.6.

These changes are all upstream so should not be required once we've updated
to elfutils 0.152 or later. Therefore this patch consolidates several
changes from elfutils upstream by Roland McGrath into a single file so that
it's easier to remove later once we upgrade.
Links to upstream gitweb of the consolidated commits follow:
- http://git.fedorahosted.org/git?p=elfutils.git;a=commit;h=7094d00a169afb27e0323f8580e817798ae7c240
- http://git.fedorahosted.org/git?p=elfutils.git;a=commit;h=fd992543185126eb0280c1ee0883e073020499b4
- http://git.fedorahosted.org/git?p=elfutils.git;a=commit;h=4db89f04bb59327abd7a3b60e88f2e7e73c65c79
- http://git.fedorahosted.org/git?p=elfutils.git;a=commit;h=8f6c1795ab9d41f03805eebd55767070ade55aac
- http://git.fedorahosted.org/git?p=elfutils.git;a=commit;h=240784b48aa276822c5a61c9ad6a4355051ce259

Joshua Lock <josh@linux.intel.com> - 06/04/11

Index: elfutils-0.148/libasm/asm_newscn.c
===================================================================
--- elfutils-0.148.orig/libasm/asm_newscn.c
+++ elfutils-0.148/libasm/asm_newscn.c
@@ -162,7 +162,6 @@ asm_newscn (ctx, scnname, type, flags)
      GElf_Xword flags;
 {
   size_t scnname_len = strlen (scnname) + 1;
-  unsigned long int hval;
   AsmScn_t *result;
 
   /* If no context is given there might be an earlier error.  */
@@ -180,8 +179,6 @@ asm_newscn (ctx, scnname, type, flags)
       return NULL;
     }
 
-  hval = elf_hash (scnname);
-
   rwlock_wrlock (ctx->lock);
 
   /* This is a new section.  */
Index: elfutils-0.148/src/elflint.c
===================================================================
--- elfutils-0.148.orig/src/elflint.c
+++ elfutils-0.148/src/elflint.c
@@ -707,9 +707,10 @@ section [%2d] '%s': symbol %zu: invalid 
 	{
 	  if (xndxdata == NULL)
 	    {
-	      ERROR (gettext ("\
+	      if (!no_xndx_warned)
+		ERROR (gettext ("\
 section [%2d] '%s': symbol %zu: too large section index but no extended section index section\n"),
-		     idx, section_name (ebl, idx), cnt);
+		       idx, section_name (ebl, idx), cnt);
 	      no_xndx_warned = true;
 	    }
 	  else if (xndx < SHN_LORESERVE)
@@ -1592,10 +1593,6 @@ check_dynamic (Ebl *ebl, GElf_Ehdr *ehdr
       [DT_STRSZ] = true,
       [DT_SYMENT] = true
     };
-  GElf_Addr reladdr = 0;
-  GElf_Word relsz = 0;
-  GElf_Addr pltreladdr = 0;
-  GElf_Word pltrelsz = 0;
 
   memset (has_dt, '\0', sizeof (has_dt));
   memset (has_val_dt, '\0', sizeof (has_val_dt));
@@ -1694,15 +1691,6 @@ section [%2d] '%s': entry %zu: level 2 t
 section [%2d] '%s': entry %zu: DT_PLTREL value must be DT_REL or DT_RELA\n"),
 	       idx, section_name (ebl, idx), cnt);
 
-      if (dyn->d_tag == DT_REL)
-	reladdr = dyn->d_un.d_ptr;
-      if (dyn->d_tag == DT_RELSZ)
-	relsz = dyn->d_un.d_val;
-      if (dyn->d_tag == DT_JMPREL)
-	pltreladdr = dyn->d_un.d_ptr;
-      if (dyn->d_tag == DT_PLTRELSZ)
-	pltrelsz = dyn->d_un.d_val;
-
       /* Check that addresses for entries are in loaded segments.  */
       switch (dyn->d_tag)
 	{
Index: elfutils-0.148/src/ldgeneric.c
===================================================================
--- elfutils-0.148.orig/src/ldgeneric.c
+++ elfutils-0.148/src/ldgeneric.c
@@ -285,12 +285,10 @@ static int
 check_for_duplicate2 (struct usedfiles *newp, struct usedfiles *list)
 {
   struct usedfiles *first;
-  struct usedfiles *prevp;
 
   if (list == NULL)
     return 0;
 
-  prevp = list;
   list = first = list->next;
   do
     {
Index: elfutils-0.148/src/ldscript.y
===================================================================
--- elfutils-0.148.orig/src/ldscript.y
+++ elfutils-0.148/src/ldscript.y
@@ -802,12 +802,9 @@ add_versions (struct version *versions)
 
   do
     {
-      struct version *oldp;
-
       add_id_list (versions->versionname, versions->local_names, true);
       add_id_list (versions->versionname, versions->global_names, false);
 
-      oldp = versions;
       versions = versions->next;
     }
   while (versions != NULL);
Index: elfutils-0.148/src/unstrip.c
===================================================================
--- elfutils-0.148.orig/src/unstrip.c
+++ elfutils-0.148/src/unstrip.c
@@ -1301,7 +1301,6 @@ more sections in stripped file than debu
   /* Match each debuginfo section with its corresponding stripped section.  */
   bool check_prelink = false;
   Elf_Scn *unstripped_symtab = NULL;
-  size_t unstripped_strtab_ndx = SHN_UNDEF;
   size_t alloc_avail = 0;
   scn = NULL;
   while ((scn = elf_nextscn (unstripped, scn)) != NULL)
@@ -1313,7 +1312,6 @@ more sections in stripped file than debu
       if (shdr->sh_type == SHT_SYMTAB)
 	{
 	  unstripped_symtab = scn;
-	  unstripped_strtab_ndx = shdr->sh_link;
 	  continue;
 	}
 
Index: elfutils-0.148/src/ldscript.c
===================================================================
--- elfutils-0.148.orig/src/ldscript.c
+++ elfutils-0.148/src/ldscript.c
@@ -2728,12 +2728,9 @@ add_versions (struct version *versions)
 
   do
     {
-      struct version *oldp;
-
       add_id_list (versions->versionname, versions->local_names, true);
       add_id_list (versions->versionname, versions->global_names, false);
 
-      oldp = versions;
       versions = versions->next;
     }
   while (versions != NULL);