* symfile.c (set_initial_language): Update.

(deduce_language_from_filename): Argument type now const.
	* symtab.h (find_main_filename): Update.
	(deduce_language_from_filename): Update.
	* symtab.c (find_main_filename): Make result const.
	* dwarf2read.c (dw2_find_symbol_file): Change return type.
	* psymtab.c (find_symbol_file_from_partial): Change return type.
	* symfile.h (struct quick_symbol_functions) <find_symbol_file>:
	Make result const.

gdb/ChangeLog

@@ -1,3 +1,15 @@
+2010-07-13  Tom Tromey  <tromey@redhat.com>
+
+	* symfile.c (set_initial_language): Update.
+	(deduce_language_from_filename): Argument type now const.
+	* symtab.h (find_main_filename): Update.
+	(deduce_language_from_filename): Update.
+	* symtab.c (find_main_filename): Make result const.
+	* dwarf2read.c (dw2_find_symbol_file): Change return type.
+	* psymtab.c (find_symbol_file_from_partial): Change return type.
+	* symfile.h (struct quick_symbol_functions) <find_symbol_file>:
+	Make result const.
+
 2010-07-13  Tom Tromey  <tromey@redhat.com>
 
 	* breakpoint.c (save_cmdlist): No longer static.

gdb/dwarf2read.c

@@ -2150,7 +2150,7 @@ dw2_expand_symtabs_with_filename (struct objfile *objfile,
     }
 }
 
-static char *
+static const char *
 dw2_find_symbol_file (struct objfile *objfile, const char *name)
 {
   struct dwarf2_per_cu_data *cu;
@@ -2176,8 +2176,7 @@ dw2_find_symbol_file (struct objfile *objfile, const char *name)
   if (!cu->v.quick->lines)
     return NULL;
 
-  return (char *) cu->v.quick->file_names[cu->v.quick->lines->num_file_names
+  return cu->v.quick->file_names[cu->v.quick->lines->num_file_names - 1];
-					  - 1];
 }
 
 static void

gdb/psymtab.c

@@ -949,7 +949,7 @@ psymtab_to_fullname (struct partial_symtab *ps)
   return NULL;
 }
 
-static char *
+static const char *
 find_symbol_file_from_partial (struct objfile *objfile, const char *name)
 {
   struct partial_symtab *pst;

gdb/symfile.c

@@ -1538,7 +1538,7 @@ symbol_file_command (char *args, int from_tty)
 void
 set_initial_language (void)
 {
-  char *filename;
+  const char *filename;
   enum language lang = language_unknown;
 
   filename = find_main_filename ();
@@ -2665,7 +2665,7 @@ init_filename_language_table (void)
 }
 
 enum language
-deduce_language_from_filename (char *filename)
+deduce_language_from_filename (const char *filename)
 {
   int i;
   char *cp;

gdb/symfile.h

@@ -210,7 +210,7 @@ struct quick_symbol_functions
 
   /* Return the file name of the file holding the symbol in OBJFILE
      named NAME.  If no such symbol exists in OBJFILE, return NULL.  */
-  char *(*find_symbol_file) (struct objfile *objfile, const char *name);
+  const char *(*find_symbol_file) (struct objfile *objfile, const char *name);
 
   /* This method is specific to Ada.  It walks the partial symbol
      tables of OBJFILE looking for a name match.  WILD_MATCH and

gdb/symtab.c

@@ -1617,14 +1617,16 @@ basic_lookup_transparent_type (const char *name)
 /* FIXME:  What about languages without main() or specially linked
    executables that have no main() ? */
 
-char *
+const char *
 find_main_filename (void)
 {
   struct objfile *objfile;
-  char *result, *name = main_name ();
+  char *name = main_name ();
 
   ALL_OBJFILES (objfile)
   {
+    const char *result;
+
     if (!objfile->sf)
       continue;
     result = objfile->sf->qf->find_symbol_file (objfile, name);

gdb/symtab.h

@@ -1136,7 +1136,7 @@ extern char **make_source_files_completion_list (char *, char *);
 
 int matching_obj_sections (struct obj_section *, struct obj_section *);
 
-extern char *find_main_filename (void);
+extern const char *find_main_filename (void);
 
 extern struct symtab *find_line_symtab (struct symtab *, int, int *, int *);
 
@@ -1149,7 +1149,7 @@ extern void skip_prologue_sal (struct symtab_and_line *);
 
 extern void clear_symtab_users (void);
 
-extern enum language deduce_language_from_filename (char *);
+extern enum language deduce_language_from_filename (const char *);
 
 /* symtab.c */