Constify main.c:get_init_files.

A following patch will want to make the "gdbinit" global array const.
As usual, that forces in a cascading series of const additions.  This
patch preemptively does those.  I went all the way up to constifying
catch_command_errors, but then that would require constifying
execute_command as well (which is a much more significant effort).  So
as stop point, I found the cleanest would be to add a variant of
catch_command_errors that takes const args, and use that in the few
spots that needed it due to the the get_init_files constification.

gdb/
2013-07-01  Pedro Alves  <palves@redhat.com>

	* cli/cli-cmds.c (source_script): Make 'file' parameter const.
	* cli/cli-cmds.h (source_script): Likewise.
	* exceptions.c (catch_command_errors_const): New function.
	* exceptions.h (catch_command_errors_const): Declare.
	* main.c (get_init_files): Make parameters const, and adjust.
	(captured_main): Make 'system_gdbinit', 'home_gdbinit' and
	'local_gdbinit' locals const.  Adjust to use
	catch_command_errors_const.
	(print_gdb_help): Make 'system_gdbinit', 'home_gdbinit' and
	'local_gdbinit' locals const.

1 files changed, 16 insertions, 0 deletions

diff --git a/gdb/exceptions.c b/gdb/exceptions.c
index 0cdd16b..416d81d 100644
--- a/gdb/exceptions.c
+++ b/gdb/exceptions.c
@@ -577,3 +577,19 @@ catch_command_errors (catch_command_errors_ftype *command,
     return 0;
   return 1;
 }
+
+int
+catch_command_errors_const (catch_command_errors_const_ftype *command,
+			    const char *arg, int from_tty, return_mask mask)
+{
+  volatile struct gdb_exception e;
+
+  TRY_CATCH (e, mask)
+    {
+      command (arg, from_tty);
+    }
+  print_any_exception (gdb_stderr, NULL, e);
+  if (e.reason < 0)
+    return 0;
+  return 1;
+}