void dwarf_decode_macros(dwarf2_per_objfile *per_objfile, buildsym_compunit *builder, const dwarf2_section_info *section, const struct line_header *lh, unsigned int offset_size, unsigned int offset, dwarf2_section_info *str_section, dwarf2_section_info *str_offsets_section, gdb::optional< ULONGEST > str_offsets_base, int section_is_gnu, struct dwarf2_cu *cu)