[cfe-dev] C++11 builds with clang 3.2 and stdlibc++-4.4

[Daniel Heckenberg]

Are there any specific problems / dangers using the (patched) 
libstdc++-4.4 with recent clang in c++11 mode?

My target environment is RHEL6.5 (gcc-4.4.7) which is the latest RHEL 
release.  It is very desirable to use c++11 without having to upgrade 
the system stdlibc++.  I imagine many others would be in this situation 
also.

Thanks,
Daniel

ps The patch I linked has a reversed diff for tuple.  If anyone is 
interested, I can post / submit a fixed version.

On 08/05/14 22:53, Jeffrey Yasskin wrote:
> It's probably worth removing that patch. libstdc++-4.4 is probably
> much older than you should expect to use with C++11 nowadays.
>
> On Thu, May 8, 2014 at 3:05 AM, Nikola Smiljanic <popizdeh at gmail.com> wrote:
>> Weird, I wasn't aware of this :) CC Jeffrey as he seems to be the author of
>> the original patch.
>>
>> P.S. You down under, mate?
>>
>>
>> On Thu, May 8, 2014 at 6:42 PM, Daniel Heckenberg <danielh at al.com.au> wrote:
>>>
>>> Except that the patch is explicitly maintained as part of clang, right?
>>> http://llvm.org/svn/llvm-project/cfe/trunk/www/libstdc++4.4-clang0x.patch
>>>
>>> Cheers,
>>> Daniel
>>>
>>>
>>> On 08/05/14 13:09, Nikola Smiljanic wrote:
>>>
>>> You should submit the patch to stdlibc++ project ;)
>>>
>>>
>>> On Thu, May 8, 2014 at 12:38 PM, Daniel Heckenberg <danielh at al.com.au>
>>> wrote:
>>>>
>>>> Hello,
>>>>
>>>> Following the information here: http://clang.llvm.org/cxx_status.html
>>>> I've been attempting to use clang 3.2 in C++11 mode with stdlibc++-4.4.  It
>>>> seems that the patch linked on that page is incomplete, as I soon
>>>> encountered problems with pair, shared_ptr and tuple.
>>>>
>>>> I've attempted to extend the patch to fix those problems (see attached
>>>> diff).  Most were trivial changes due to C++0x to C++11 default ctor/op rule
>>>> differences, but to fix the tuple problem I've essentially back-ported the
>>>> header contents from stdlibc++-4.5.4.
>>>>
>>>> I'd be interested in feedback and/or to contribute this new patch.
>>>>
>>>> Many thanks,
>>>> Daniel
>>>>
>>>>
>>>>
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>>>