lang_input_statement_type next pointers

"next" and "next_real_file" in lang_input_statement_type always point
to another lang_input_statement_type, so it makes sense for these to
not be the generic lang_statement_union_type.  This patch also updates
a number of variables in ldlang.c for the same reason, and modifies
lang_statement_append to reduce the need for casts.

	* ldlang.h (lang_input_statement_type): Make next
	and next_real_file a lang_input_statement_type pointer.
	(lang_statement_append): Delete prototype.
	(LANG_FOR_EACH_INPUT_STATEMENT): Update for lang_input_statement_type
	change.
	* ldmain.c (add_archive_element): Likewise.
	* ldlang.c: Likewise throughout.
	(lang_statement_append): Make static.  Make element and field
	void pointers.  Remove casts in calls.
	(lang_check): Use a lang_input_statement_type pointer for "file".
	(find_rescan_insertion): Similarly for "iter" and return value.
	(lang_process): Similarly for "insert", "iter" and "temp".
	* emultempl/spuelf.em (embedded_spu_file): Likewise.
	* emultempl/aix.em (gld${EMULATION_NAME}_before_allocation): Expand
	lang_statment_append call.

2 files changed, 5 insertions, 6 deletions

diff --git a/ld/emultempl/aix.em b/ld/emultempl/aix.em
index bcf959d..8151a9d 100644
--- a/ld/emultempl/aix.em
+++ b/ld/emultempl/aix.em
@@ -945,9 +945,8 @@ gld${EMULATION_NAME}_before_allocation (void)
       else
 	{
 	  is->header.next = NULL;
-	  lang_statement_append (&os->children,
-				 (lang_statement_union_type *) is,
-				 &is->header.next);
+	  *os->children.tail = (lang_statement_union_type *) is;
+	  os->children.tail = &is->header.next;
 	}
     }
 
diff --git a/ld/emultempl/spuelf.em b/ld/emultempl/spuelf.em
index f630975..5ddf41c 100644
--- a/ld/emultempl/spuelf.em
+++ b/ld/emultempl/spuelf.em
@@ -512,9 +512,9 @@ embedded_spu_file (lang_input_statement_type *entry, const char *flags)
     return FALSE;
   close (fd);
 
-  for (search = (lang_input_statement_type *) input_file_chain.head;
+  for (search = &input_file_chain.head->input_statement;
        search != NULL;
-       search = (lang_input_statement_type *) search->next_real_file)
+       search = search->next_real_file)
     if (search->filename != NULL)
       {
 	const char *infile = base_name (search->filename);
@@ -575,7 +575,7 @@ embedded_spu_file (lang_input_statement_type *entry, const char *flags)
   new_ent->header.next = entry->header.next;
   entry->header.next = new_ent;
   new_ent->input_statement.next_real_file = entry->next_real_file;
-  entry->next_real_file = new_ent;
+  entry->next_real_file = &new_ent->input_statement;
 
   /* Ensure bfd sections are excluded from the output.  */
   bfd_section_list_clear (entry->the_bfd);