[PATCH,DWARF,v2] AIX dwarf2out label fix

[Jason Merrill]

On 05/18/2017 06:00 AM, David Edelsohn wrote:
> This version adds a macro DWARF_INITIAL_LENGTH_SIZE_STR based on
> DWARF_OFFSET_SIZE to define the string expression to append to the
> label to correct the offset.
> 
> Because AIX Assembler inserts the section length, the section label
> generated by GCC points to the wrong location and must be adjusted
> when referenced in DW_AT_stmt_list.
> 
> +  char dl_section_label[MAX_ARTIFICIAL_LABEL_BYTES];

It seems inaccurate to call this variable "label" when it's a label name 
minus offset.  Maybe dl_section_ref?

>         if (debug_info_level >= DINFO_LEVEL_TERSE)
>           add_AT_lineptr (ctnode->root_die, DW_AT_stmt_list,
>                           (!dwarf_split_debug_info
> -                         ? debug_line_section_label
> +                         ? dl_section_label
>                            : debug_skeleton_line_section_label));

Doesn't debug_skeleton_line_section_label need the same offset?

Jason