[Qt-creator] Latest 3.6.0-rc1 & Debugging on OS X

Mon Dec 14 15:43:32 CET 2015

> On Dec 14, 2015, at 2:53 PM, Mike Jackson <imikejackson at gmail.com> wrote:
> 
>> 
>> On Dec 14, 2015, at 4:07 AM, Ziller Eike <Eike.Ziller at theqtcompany.com> wrote:
>> 
>>> 
>>> On Dec 11, 2015, at 5:22 PM, Mike Jackson <imikejackson at gmail.com> wrote:
>>> 
>>> 
>>>> On Dec 11, 2015, at 1:42 AM, Ziller Eike <Eike.Ziller at theqtcompany.com> wrote:
>>>> 
>>>>> 
>>>>> On Dec 10, 2015, at 19:15, Mike Jackson <imikejackson at gmail.com> wrote:
>>>>> 
>>>>> I should have noted that I am running OS X 10.10.5 and Xcode 6.4. I have no idea if I can move up to Xcode 7.x and still use Qt 5.5?
>>>> 
>>>> As far as I know there are no issues with that. I’m using Qt 5.5 on El Capitan on my Notebook as well.
>>> 
>>> I may try Xcode 7.2 over the weekend on a test machine. Xcode 7 tolerates CMake projects better than the 6.x series did.
>>> 
>>>> 
>>>>> We have to self compile due to our requirement for C++11 support.
>>>> 
>>>> Why do you need to compile Qt yourself for that? We use C++11 in Qt Creator and use the default Qt package build for that (and CONFIG+=c++11 in our .pro files).
>>>> 
>>>> Br, Eike
>>> 
>>> The default Qt packages turn OFF C++11 support which means that the Qt Frameworks are linking against libstdc++ which is the older NON-C++11 compliant package.
>> 
>> Default Qt binaries link against libc++ since Qt 5.4 (which removed support for OS X 10.6).
> 
> Maybe I am confused about the C++11 support when compiling Qt. The downloadable Qt 5.5.1 packages specifically have C++11=OFF in the configure line.

Not sure what you mean by that or where you see it.
For me mkspecs/qconfig.pri from the binary Qt package from qt.io contains "c++11" in its QT_CONFIG line, and the frameworks link against libc++ (checked with otool -L). The QT_CONFIG+=c++11 means that the Qt modules are compiled with C++11 support, and on OS X that also means CONFIG+=c++11 for applications built against it with qmake (mkspecs/features/mac/default_post.prf).

Br, Eike

> Does this mean that Qt itself does not use C++11 BUT it is linked against a C++11 compliant (libc++) library? OS X changed the default C++ library from libstdC++ to libC++ at 10.9 I believe. If this is the case then we might actually be able to go back to using the prebuilt Qt packages (Which is a good thing.. )
> 
> —
> Mike Jackson
> 
>> 
>> Br, Eike
>> 
>>> This has been causing issues with our projects where some of our 3rd party libraries link against libc++ with C++11 compliance turned on. We get spurious crashes and runtime issues unless we get all our our 3rd party libraries to specifically link against libc++. Since the default Qt packages have a minimum OS X runtime of 10.7 they will link against libstdc++. We crank up the minimum to 10.9 and config with C++11 support. This (and other config options to other 3rd party libs) have fixed our issues.
>>> 
>>> There were other benefits to moving to C++11 (like moving from boost::shared_ptr to std::shared_ptr) which allowed QtCreators code models (both Clang and the internal one) to offer completions MUCH faster than before and more completely.
>>> 
>>> —
>>> Mike Jackson
>>> 
>>>> 
>>>>> 
>>>>> Also note that my tests are quick and dirty. Just quick “does it launch quickly when compared to Xcode”.
>>>>> 
>>>>> Thanks
>>>>> Mike Jackson
>>>>> 
>>>>>> On Dec 10, 2015, at 11:33 AM, rpzrpzrpz at gmail.com wrote:
>>>>>> 
>>>>>> Thanks mike for doing this "guinea pig" work.
>>>>>> 
>>>>>> I spend all of my time on OSX and Qt, so not losing developer tool effectiveness
>>>>>> on this OSX platform is really important for 5.6. (even though I can tied up on 5.5.1 right now and cannot donate cycles.)
>>>>>> 
>>>>>> I am running El Capitan, so that may be a sticking point in late January for 6.5RC.
>>>>>> 
>>>>>> md
>>>>>> 
>>>>>> On 12/10/2015 10:28 AM, Mike Jackson wrote:
>>>>>>> 
>>>>>>>> On Dec 10, 2015, at 4:54 AM, Ziller Eike <Eike.Ziller at theqtcompany.com> wrote:
>>>>>>>> 
>>>>>>>>> 
>>>>>>>>> On Dec 2, 2015, at 8:34 PM, Mike Jackson <imikejackson at gmail.com> wrote:
>>>>>>>>> 
>>>>>>>>> Hello, 
>>>>>>>>> The issue seems to be resolved. I can debug again. BUT the start up time when launching my application is very long. It seems to be taking about 1 minute to launch to my gui.
>>>>>>>> 
>>>>>>>> Could you please take a look at the debugger log, what it does during that long time?
>>>>>>>> 
>>>>>>>> Br, Eike
>>>>>>> 
>>>>>>> The Dec 10 nightly build of 5.6.0 seems to have fixed these issues. The debugger startup is back to normal. The initial gathering of variables on first break is still a bit slower when compared to things like Xcode but is very usable.
>>>>>>> 
>>>>>>> Thanks
>>>>>>> Mike Jackson
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>>> 
>>>>>>>>> That was with NO breakpoints active. If this last piece is being worked on then I think the 3.6 release is shaping up very nicely to make a comeback on OS X. I have switched back to the QtCreator code model and the completion speed and quality is very close to the likes of Visual Studio and Xcode. Keep up the great work.
>>>>>>>>> 
>>>>>>>>> Mike Jackson
>>>>>>>>> 
>>>>>>>>>> On Dec 1, 2015, at 4:38 AM, Stenger Christian <Christian.Stenger at theqtcompany.com> wrote:
>>>>>>>>>> 
>>>>>>>>>> Hi Mike,
>>>>>>>>>> 
>>>>>>>>>> can you please re-check with the newest snapshot? The issue you've mentioned should have been fixed yesterday afternoon, but I assume the package of Nov 30th did not include this fix.
>>>>>>>>>> 
>>>>>>>>>> Kind regards,
>>>>>>>>>> Christian
>>>>>>>>>> 
>>>>>>>>>> 
>>>>>>>>>> ________________________________________
>>>>>>>>>> From: Qt-creator <qt-creator-bounces at qt-project.org> on behalf of Mike Jackson <imikejackson at gmail.com>
>>>>>>>>>> Sent: Monday, November 30, 2015 7:08 PM
>>>>>>>>>> To: qt-creator
>>>>>>>>>> Subject: [Qt-creator] Latest 3.6.0-rc1 & Debugging on OS X
>>>>>>>>>> 
>>>>>>>>>> The latest RC’s for the 3.6.0 release are really starting to look nice but just wanted to report here a few issues with the debugging on OS X to see if anyone else was seeing the issues?
>>>>>>>>>> 
>>>>>>>>>> Basically with the latest nightly from NOV 30 2015 the debugger errors out and does not start up. One of the nightlies from mid-last week would start up but would just spin LLDB at 100% indefinitely and never seem to come back with the locals and stack when attempting to stop at a break point.
>>>>>>>>>> 
>>>>>>>>>> This is with OS X 10.10 (Yosemite) and Xcode 6.4.
>>>>>>>>>> 
>>>>>>>>>> Thanks
>>>>>>>>>> Mike Jackson
>>>>>>>>>> _______________________________________________
>>>>>>>>>> Qt-creator mailing list
>>>>>>>>>> Qt-creator at qt-project.org
>>>>>>>>>> http://lists.qt-project.org/mailman/listinfo/qt-creator
>>>>>>>>> 
>>>>>>>>> _______________________________________________
>>>>>>>>> Qt-creator mailing list
>>>>>>>>> Qt-creator at qt-project.org
>>>>>>>>> http://lists.qt-project.org/mailman/listinfo/qt-creator
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> _______________________________________________
>>>>>>> Qt-creator mailing list
>>>>>>> 
>>>>>>> Qt-creator at qt-project.org
>>>>>>> http://lists.qt-project.org/mailman/listinfo/qt-creator
>>>>>> 
>>>>>> _______________________________________________
>>>>>> Qt-creator mailing list
>>>>>> Qt-creator at qt-project.org
>>>>>> http://lists.qt-project.org/mailman/listinfo/qt-creator
>>>>> 
>>>>> _______________________________________________
>>>>> Qt-creator mailing list
>>>>> Qt-creator at qt-project.org
>>>>> http://lists.qt-project.org/mailman/listinfo/qt-creator
>>>> 
>>>> -- 
>>>> Eike Ziller, Senior Software Engineer | The Qt Company
>>>> Digia Germany GmbH, Rudower Chaussee 13, D-12489 Berlin
>>>> Geschäftsführer: Mika Pälsi, Juha Varelius, Tuula Haataja
>>>> Sitz der Gesellschaft: Berlin, Registergericht: Amtsgericht Charlottenburg, HRB 144331 B
>>> 
>>> _______________________________________________
>>> Qt-creator mailing list
>>> Qt-creator at qt-project.org
>>> http://lists.qt-project.org/mailman/listinfo/qt-creator
> 
> _______________________________________________
> Qt-creator mailing list
> Qt-creator at qt-project.org
> http://lists.qt-project.org/mailman/listinfo/qt-creator