Re: i370 port

[Paolo Bonzini <bonzini@gnu.org>]

>> In any case, if you build with -g and use in addition the "debug
>> assembler output" flag -dA the assembler output should contain
>> human-readable comments containing line number information.
>
> Regardless, if line number notes are interspersed in the stream,
> maybe whenever I write out an assembler instruction I will have
> access to those notes and can print out a comment.

No, that might break when you upgrade later.  GCC already has support 
for annotating the assembly output with human-readable line number info. 
  That is option -dA as Ulrich pointed out.

Only DWARF-2 output supports it currently, but if you want to use it say 
together with STABS, it is just a matter of modifying dbxout_source_line 
and add a single statement like this:

       if (flag_debug_asm)
         fprintf (asm_out_file, "\t%s %s:%d\n", ASM_COMMENT_START,
                  filename, line);

Paolo