(ROUND_UP):

(ROUND_UP):
(ROUND_DOWN): New macros.
(need_to_recreate_heap): Renamed to using_dynamic_heap.
(init_heap): New extern.
(data_region_size):
(recreate_heap):
(read_in_bss):
(map_in_heap):
(round_to_next):
(w32_fatal_reload_error):
(get_section_size): Obsolete externs removed.