[cfe-dev] Help with compiling code with libcxx

[Ashok Nalkund]

On 6/16/2012 11:03 AM, Ashok Nalkund wrote:
> On 6/16/2012 7:35 AM, Konstantin Tokarev wrote:
>>
>>
>> 16.06.2012, 03:50, "Ashok Nalkund"<ashoknn at qualcomm.com>:
>>> On 6/15/2012 4:45 PM, Richard Smith wrote:
>>>
>>>>    On Fri, Jun 15, 2012 at 4:28 PM, Dmitri Gribenko<gribozavr at gmail.com>     wrote:
>>>>>    On Fri, Jun 15, 2012 at 4:22 PM, Ashok Nalkund<ashoknn at qualcomm.com>     wrote:
>>>>>>    Any info on compiling Qt (4.8.2) with clang&     libc++ ? I couldnt find
>>>>>>    replacements for things like "__gnu_cxx::__exchange_and_add()" being used in
>>>>>>    Qt.
>>>>>    Clang has C11 atomics:
>>>>>    http://clang.llvm.org/docs/LanguageExtensions.html#__c11_atomic
>>>>    It also supports the full set of GNU atomic builtins, if using
>>>>    _Atomic(...) types is impractical:
>>>>
>>>>    http://gcc.gnu.org/onlinedocs/gcc-4.7.0/gcc/_005f_005fatomic-Builtins.html#_005f_005fatomic-Builtins
>>>
>>> If I understand correctly, you are suggesting modifying Qt code and
>>> replace the __gnu_cxx::__exchange_and_add() and similar calls with
>>> libc++ variants, right?
>>
>> If you are about QtWebKit code, feel free to just disable GCC clause of #ifdef
>> You may loose performance of atomiv operations in WebKit though.
>>
>
> It was in script, I've disabled script for now (our code uses the script
> functionality but I'll see how this goes).
>
That went through and now I have Qt compiled with clang & libc++ :). Thanks.