Re: Link error in CMake for HPPA1.1, wrong result for HPPA 2.0

[Carlos O'Donell <carlos@systemhalted.org>]

On 9/7/2011 7:35 PM, John David Anglin wrote:
> 
> On 29-Aug-11, at 2:31 PM, Rolf Eike Beer wrote:
> 
>> You wrote:
>>> On 8/29/2011 4:12 AM, Rolf Eike Beer wrote:
>>
>>>> Confirmed, it is a regression in gcc 4.5. If I build using 4.4.6
>>>> everything works fine. I'll file a bug report tonight.
>>>
>>> Interesting, there's not much difference in the PA backend for these two
>>> versions.
>>>
>>> Add me (danglin at gcc.gnu.org) to the CC list on the GCC bug report and
>>> I'll try to
>>> duplicate the problem.
>>
>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50230
>>
>> Eike
> 
> 
> The problem appears to be that comdat groups and stubs don't get along
> with each other.  Comdat groups seem to get merged and this can result
> in out of range branches.
> 
> Linking with the --unique='.text.*' option avoids the error, but this probably
> breaks comdat and discard support.
> 
> For now, I think the best solution (untested) is to configure GCC with the
> --disable-comdat option.
> 
> I'm going to file a binutils PR.

Interesting analysis.

I don't see how you can fix this though.

Support multiple comdat groups and arrange for the merging to
happen correctly?

Cheers,
Carlos.