Use const char* instead of char*.

Reduce the number of warnings with -Wwrite-strings.
* src/xrdb.c (get_environ_db, get_system_name):
* src/unexelf.c (find_section):
* src/term.c (string_cost, string_cost_one_line, per_line_cost)
(get_named_tty, init_tty):
* src/sysdep.c (sys_subshell):
* src/sound.c (sound_perror, sound_warning, vox_open, vox_init)
(alsa_sound_perror, alsa_open, alsa_configure, alsa_init):
* src/search.c (Freplace_match):
* src/process.c (Fmake_network_process, send_process, init_process):
* src/lread.c (Fload, init_lread):
* src/keymap.c (Fdescribe_buffer_bindings, describe_map_tree):
* src/keyboard.c (parse_tool_bar_item, struct event_head):
* src/gtkutil.h (xg_get_font_name):
* src/gtkutil.c (get_dialog_title, create_dialog, xg_get_font_name)
(make_widget_for_menu_item, make_menu_item, create_menus)
(xg_make_tool_item):
* src/font.c (parse_matrix, font_parse_name):
* src/floatfns.c (rounding_driver, float_error_fn_name):
* src/filelock.c (get_boot_time_1, lock_file_1):
* src/fileio.c (barf_or_query_if_file_exists, check_writable):
* src/editfns.c (get_system_name, get_operating_system_release)
(Fencode_time, Fset_time_zone_rule):
* src/dispextern.h (string_cost, per_line_cost, get_named_tty, init_tty):
* src/buffer.c (defvar_per_buffer): Use const.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/dispextern.h b/src/dispextern.h
index 44ea4349250..c36db91ea02 100644
--- a/src/dispextern.h
+++ b/src/dispextern.h
@@ -3275,18 +3275,18 @@ extern void tty_set_terminal_modes (struct terminal *);
 extern void tty_reset_terminal_modes (struct terminal *);
 extern void tty_turn_off_insert (struct tty_display_info *);
 extern void tty_turn_off_highlight (struct tty_display_info *);
-extern int string_cost (char *);
-extern int per_line_cost (char *);
+extern int string_cost (const char *);
+extern int per_line_cost (const char *);
 extern void calculate_costs (struct frame *);
 extern void produce_glyphs (struct it *);
 extern void produce_special_glyphs (struct it *, enum display_element_type);
 extern int tty_capable_p (struct tty_display_info *, unsigned, unsigned long, unsigned long);
 extern void set_tty_color_mode (struct tty_display_info *, struct frame *);
 extern struct terminal *get_tty_terminal (Lisp_Object, int);
-extern struct terminal *get_named_tty (char *);
+extern struct terminal *get_named_tty (const char *);
 EXFUN (Ftty_type, 1);
 extern void create_tty_output (struct frame *);
-extern struct terminal *init_tty (char *, char *, int);
+extern struct terminal *init_tty (const char *, const char *, int);
 
 
 /* Defined in scroll.c */