constify command docs

This makes the command "doc" parameter const.

2014-07-24  Tom Tromey  <tromey@redhat.com>

	* cli/cli-decode.c (add_cmd, add_prefix_cmd)
	(add_abbrev_prefix_cmd, add_set_or_show_cmd, add_info)
	(add_info_alias, add_com): Make "doc" const.
	(print_doc_line): Make "str" const.
	(delete_cmd): Update.
	* cli/cli-decode.h (struct cmd_list_element) <doc>: Now const.
	(print_doc_line): Update.
	* cli/cli-script.c (document_command): Update.
	* command.h (add_cmd, add_prefix_cmd, add_abbrev_prefix_cmd)
	(add_com, add_info, add_info_alias): Update.
	* guile/scm-cmd.c (cmdscm_destroyer): Update.
	* python/py-cmd.c (cmdpy_destroyer): Update.

1 files changed, 8 insertions, 5 deletions

diff --git a/gdb/cli/cli-script.c b/gdb/cli/cli-script.c
index 1147073..fbcc2dd 100644
--- a/gdb/cli/cli-script.c
+++ b/gdb/cli/cli-script.c
@@ -1611,24 +1611,27 @@ document_command (char *comname, int from_tty)
   doclines = read_command_lines (tmpbuf, from_tty, 0, 0, 0);
 
   if (c->doc)
-    xfree (c->doc);
+    xfree ((char *) c->doc);
 
   {
     struct command_line *cl1;
     int len = 0;
+    char *doc;
 
     for (cl1 = doclines; cl1; cl1 = cl1->next)
       len += strlen (cl1->line) + 1;
 
-    c->doc = (char *) xmalloc (len + 1);
-    *c->doc = 0;
+    doc = (char *) xmalloc (len + 1);
+    *doc = 0;
 
     for (cl1 = doclines; cl1; cl1 = cl1->next)
       {
-	strcat (c->doc, cl1->line);
+	strcat (doc, cl1->line);
 	if (cl1->next)
-	  strcat (c->doc, "\n");
+	  strcat (doc, "\n");
       }
+
+    c->doc = doc;
   }
 
   free_command_lines (&doclines);