On 09/20/2017 02:31 AM, Jakub Jelinek wrote:
> On Wed, Sep 20, 2017 at 10:20:03AM +0200, Richard Biener wrote:
>> Anyway, I did a quick LTO bootstrap with your patch and it seems
>> to work fine.
>>
>> Can you add a testcase verifying -gdwarf-5 works ok (properly
>> emitting a debug_line_str section?).
>
> I'm afraid I can't. We don't have a command line switch for
> DWARF2_ASM_LINE_DEBUG_INFO, it is something tested solely at configure time
> (I've noticed this because my working directory for whatever reason
> (many hundreds of reconfigures) doesn't have this defined), and we actually
> emit
> proper DWARF5 .debug_line{,_str} only in that case; when using .file
> directives, it is waiting for missing binutils support.
>
> Perhaps we should add -fno-dwarf2-loc-asm to force emitting .debug_line*
> by gcc?
>
> As for general DWARF5 testing, I think best coverage is GDB (say guality
> testing with -gdwarf-5), I think GDB 8.0 should have the needed support.
> I'll try to install it (am only at 7.12.1 right now) and try to do some
> testing.
What about Pierre-Marie's work to be able to use python to parse and
check dwarf output?
jeff
