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so that gcc does not warn that these functions aren't declared.

(reset_var_on_error, Fcombine_after_change_execute_1): Now static.

(fix_start_end_in_overlays): Likewise.  This function should be
simplified by using pointers-to-pointers, but that's a different
matter.

(report_overlay_modification): Rename locals to avoid shadowing.

to suppress a gcc -Wclobbered warning that does not seem to be right.

* systty.h: ... to here, so that they can be checked.

* lisp.h: ... to here, so that they can be checked.

(describe_map_tree):
Rename locals to avoid shadowing.

(copy_keymap_item, append_key, push_text_char_description):
Now static.

(make_lispy_event, make_lispy_movement, apply_modifiers):
(decode_keyboard_code, tty_read_avail_input, menu_bar_items):
(parse_tool_bar_item, read_key_sequence, Fread_key_sequence):
(Fread_key_sequence_vector): Rename locals to avoid shadowing.

* alloc.c (mark_kboards): ... from here.

(echo_char, echo_dash, cmd_error, top_level_2):
(poll_for_input, handle_async_input): Now static.

if GCC considers string literals to be constants.

(__do_global_ctors, __do_global_ctors_aux, __do_global_dtors, __main):
Use it.

if GCC considers string literals to be constants.

(xd_signature, xd_append_arg, xd_initialize):
(Fdbus_call_method, Fdbus_call_method_asynchronously):
(Fdbus_method_return_internal, Fdbus_method_error_internal):
(Fdbus_send_signal, xd_read_message_1, Fdbus_register_service):
(Fdbus_register_signal): Use SSDATA when the context wants char *.

* buffer.h (BUF_BEGV, BUF_BEGV_BYTE, BUF_ZV, BUF_ZV_BYTE, BUF_PT)
(BUF_PT_BYTE): Rewrite to handle indirect buffers (Bug#8219).
These macros can no longer be used for assignment.

* buffer.c (Fget_buffer_create, Fmake_indirect_buffer): Assign
struct members directly, instead of using BUF_BEGV etc.
(record_buffer_markers, fetch_buffer_markers): New functions for
recording and fetching special buffer markers.
(set_buffer_internal_1, set_buffer_temp): Use them.

* lread.c (unreadchar): Use SET_BUF_PT_BOTH.

* insdel.c (adjust_point): Use SET_BUF_PT_BOTH.

* intervals.c (temp_set_point_both): Use SET_BUF_PT_BOTH.
(get_local_map): Use SET_BUF_BEGV_BOTH and SET_BUF_ZV_BOTH.

* xdisp.c (hscroll_window_tree):
(reconsider_clip_changes): Use PT instead of BUF_PT.