[PATCH] Enable C++11

[Chandler Carruth]

On Mon, Jan 6, 2014 at 4:55 PM, David Fang <fang at csl.cornell.edu> wrote:

> It would be really nice to not require a bootstrap of gcc-4.8 for stage-1
>>> clang, but FSF gcc-4.8 give me unresolved issues on powerpc-darwin8.  I'd
>>> rather focus my limited time on in-tree issues in llvm/clang.  It's
>>> already
>>> a small chore maintaining this long-lived branch.
>>>
>>> Anyways, that's my $0.025.  Please consider this wish before landing that
>>> first C++11-ized patch?
>>>
>>
>> Is there a particular reason you can't use the 3.4 release branch for
>> this?
>> That was the goal of waiting until now.
>>
>
> Hi,
>
> I've actually created a powerpc-darwin8-rel-3.4 branch that tracks
> 'release_34', and tried to backport some of the fixes that missed the 3.4
> branch.  This branch isn't able to build stage-2 yet.  Trunk however, *can*
> build stage-2, but I haven't been able to identify the trunk commit that
> fixed PR 15901 and 15965, stage-2 blockers.


Cool, it sounds like these should definitely be back-ported without issue
and unblock you. That would then allow you to use Clang as a baseline for
subsequent builds.


>  Even if we identify that patch and backport, Iain and I stil have several
> diagnostics and fixes in the works.  Depending on how far trunk has
> diverged from the 3.4 brach, we *may* be able to backport those fixes as
> well.  I will certainly make an effort.


Similarly, once you have a working host by backporting these, you should be
fine to use C++11 features no?

I'd really like to not hold up this switch too much waiting on this, as it
has been a really long time coming, and it seems unlikely that there will
be anything better than backporting some fixes to 3.4 and using that as the
baseline for a modern host compiler.
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