PR 29529
* dwarf2.c (struct line_info_table): Add new field:
use_dir_and_file_0.
(concat_filename): Use new field to help select the correct table
slot.
(read_formatted_entries): Do not skip entry 0.
(decode_line_info): Set new field depending upon the version of
DWARF being parsed. Initialise filename based upon the setting of
the new field.
37833b9665