[RFC][gdb/symtab] Add DW_IDX_GNU_main_subprogram

[Tom de Vries]

[ was: Re: [PATCH][gdb/testsuite] Add KFAILs for PR symtab/24549 ]

On 2/5/21 6:28 PM, Tom de Vries wrote:
> On 2/5/21 4:25 PM, Tom Tromey wrote:
>>>>>>> "Tom" == Tom de Vries <tdevries@suse.de> writes:
>>
>> Tom> gdb/testsuite/ChangeLog:
>>
>> Tom> 2021-01-29  Tom de Vries  <tdevries@suse.de>
>>
>> Tom> 	* gdb.dwarf2/main-subprogram.exp: Add KFAIL for PR symtab/24549.
>> Tom> 	* gdb.fortran/mixed-lang-stack.exp: Same.
>>
>> This seems fine to me.  Thanks for doing this.
>>
>> This is definitely a hole in .gdb_index (which I wouldn't bother
>> fixing), but I wonder if the official DWARF index has support for this
>> situation.
> 
> AFAICT, no.  Maybe we should bring this up on the DWARF std ml?

I tried fixing this by adding a GNU extension DW_IDX_GNU_main_subprogram
to .debug_names.

WDYT?

Thanks,
- Tom
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