Constify arguments of gdb_bfd_lookup_symbol and related functions

Fixes this error:

/home/pedro/gdb/mygit/src/gdb/solib-frv.c: In function ‘int enable_break2()’:
/home/pedro/gdb/mygit/src/gdb/solib-frv.c:622:72: error: invalid conversion from ‘const void*’ to ‘void*’ [-fpermissive]
       addr = gdb_bfd_lookup_symbol (tmp_bfd, cmp_name, "_dl_debug_addr");
                                                                        ^
In file included from /home/pedro/gdb/mygit/src/gdb/solib-frv.c:23:0:
/home/pedro/gdb/mygit/src/gdb/solib.h:82:18: error:   initializing argument 3 of ‘CORE_ADDR gdb_bfd_lookup_symbol(bfd*, int (*)(asymbol*, void*), void*)’ [-fpermissive]
 extern CORE_ADDR gdb_bfd_lookup_symbol (bfd *abfd,
                  ^

The call in question is:

      addr = gdb_bfd_lookup_symbol (tmp_bfd, cmp_name, "_dl_debug_addr");

gdb/ChangeLog:

	* solib-dsbt.c (cmp_name): Constify arguments.
	* solib-frv.c (cmp_name): Likewise.
	* solib-svr4.c (svr4_create_solib_event_breakpoints): Likewise.
	* solib.c (gdb_bfd_lookup_symbol_from_symtab): Likewise.
	(bfd_lookup_symbol_from_dyn_symtab): Likewise.
	(gdb_bfd_lookup_symbol): Likewise.
	* solib.h (gdb_bfd_lookup_symbol): Likewise.
	(gdb_bfd_lookup_symbol_from_symtab): Likewise.

gdb/ChangeLog

@@ -1,3 +1,14 @@
+2015-10-13  Simon Marchi  <thundersim@gmail.com>
+
+	* solib-dsbt.c (cmp_name): Constify arguments.
+	* solib-frv.c (cmp_name): Likewise.
+	* solib-svr4.c (svr4_create_solib_event_breakpoints): Likewise.
+	* solib.c (gdb_bfd_lookup_symbol_from_symtab): Likewise.
+	(bfd_lookup_symbol_from_dyn_symtab): Likewise.
+	(gdb_bfd_lookup_symbol): Likewise.
+	* solib.h (gdb_bfd_lookup_symbol): Likewise.
+	(gdb_bfd_lookup_symbol_from_symtab): Likewise.
+
 2015-10-12  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* stack.c (parse_frame_specification): Remove message parameter,

gdb/solib-dsbt.c

@@ -777,7 +777,7 @@ enable_break_failure_warning (void)
 /* Helper function for gdb_bfd_lookup_symbol.  */
 
 static int
-cmp_name (asymbol *sym, void *data)
+cmp_name (const asymbol *sym, const void *data)
 {
   return (strcmp (sym->name, (const char *) data) == 0);
 }

gdb/solib-frv.c

@@ -484,7 +484,7 @@ enable_break_failure_warning (void)
 /* Helper function for gdb_bfd_lookup_symbol.  */
 
 static int
-cmp_name (asymbol *sym, void *data)
+cmp_name (const asymbol *sym, const void *data)
 {
   return (strcmp (sym->name, (const char *) data) == 0);
 }

gdb/solib-svr4.c

@@ -2220,7 +2220,7 @@ svr4_create_solib_event_breakpoints (struct gdbarch *gdbarch,
 /* Helper function for gdb_bfd_lookup_symbol.  */
 
 static int
-cmp_name_and_sec_flags (asymbol *sym, void *data)
+cmp_name_and_sec_flags (const asymbol *sym, const void *data)
 {
   return (strcmp (sym->name, (const char *) data) == 0
 	  && (sym->section->flags & (SEC_CODE | SEC_DATA)) != 0);
@@ -2480,7 +2480,7 @@ enable_break (struct svr4_info *info, int from_tty)
       for (bkpt_namep = solib_break_names; *bkpt_namep != NULL; bkpt_namep++)
 	{
 	  sym_addr = gdb_bfd_lookup_symbol (tmp_bfd, cmp_name_and_sec_flags,
-					    (void *) *bkpt_namep);
+					    *bkpt_namep);
 	  if (sym_addr != 0)
 	    break;
 	}

gdb/solib.c

@@ -1533,8 +1533,9 @@ solib_global_lookup (struct objfile *objfile,
 
 CORE_ADDR
 gdb_bfd_lookup_symbol_from_symtab (bfd *abfd,
-				   int (*match_sym) (asymbol *, void *),
+				   int (*match_sym) (const asymbol *,
-				   void *data)
+						     const void *),
+				   const void *data)
 {
   long storage_needed = bfd_get_symtab_upper_bound (abfd);
   CORE_ADDR symaddr = 0;
@@ -1592,8 +1593,9 @@ gdb_bfd_lookup_symbol_from_symtab (bfd *abfd,
 
 static CORE_ADDR
 bfd_lookup_symbol_from_dyn_symtab (bfd *abfd,
-				   int (*match_sym) (asymbol *, void *),
+				   int (*match_sym) (const asymbol *,
-				   void *data)
+						     const void *),
+				   const void *data)
 {
   long storage_needed = bfd_get_dynamic_symtab_upper_bound (abfd);
   CORE_ADDR symaddr = 0;
@@ -1630,8 +1632,8 @@ bfd_lookup_symbol_from_dyn_symtab (bfd *abfd,
 
 CORE_ADDR
 gdb_bfd_lookup_symbol (bfd *abfd,
-		       int (*match_sym) (asymbol *, void *),
+		       int (*match_sym) (const asymbol *, const void *),
-		       void *data)
+		       const void *data)
 {
   CORE_ADDR symaddr = gdb_bfd_lookup_symbol_from_symtab (abfd, match_sym, data);
 

gdb/solib.h

@@ -80,15 +80,17 @@ extern int libpthread_name_p (const char *name);
 /* Look up symbol from both symbol table and dynamic string table.  */
 
 extern CORE_ADDR gdb_bfd_lookup_symbol (bfd *abfd,
-					int (*match_sym) (asymbol *, void *),
+					int (*match_sym) (const asymbol *,
-					void *data);
+							  const void *),
+					const void *data);
 
 /* Look up symbol from symbol table.  */
 
 extern CORE_ADDR gdb_bfd_lookup_symbol_from_symtab (bfd *abfd,
-						    int (*match_sym) (asymbol *,
+						    int (*match_sym)
-								      void *),
+						      (const asymbol *,
-						    void *data);
+						       const void *),
+						    const void *data);
 
 /* Enable or disable optional solib event breakpoints as appropriate.  */