Hi
Thanks for the quick reply (as ever).
On 23 Feb 2013, at 18:34, Thiago Macieira wrote:
> On sábado, 23 de fevereiro de 2013 18.29.31, Paul Floyd wrote:
>> Hi
>>
>> I'm trying to build and run an app that a colleague wrote, without too much
>> success. It works OK on Linux (and Windows, but I'm not certain of that).
>>
>> I have
>> Mac OS X 10.6.8
>> XCode 4.0
>> clang 3.2
>> Qt 4.8.4 built with whatever compiler it chooses by default, probably GCC
>> 4.2 Qt 5.0.1 built with clang 3.2, release only
>>
>> With Qt 4.8.4 and g++ 4.2, it crashes in the call to QApplication::exec()
>> with an abort(). Even with the debug version of Qt, I can't step into this
>> code. Any ideas how I can debug this problem?
>
> How did you enable the debug libraries? Did you set DYLD_IMAGE_SUFFIX?
Yes, via Qt Creator.
>
> I've also been told you should try lldb instead of gdb. Also, if you have
> Apple clang 3.2, it means you don't have the latest XCode. Can you try to
> upgrade?
>
This is clang from llvm.org. Apple clang 4.2 is included with XCode, which
won't install on OS X 10.6. The clang in XCode 4.0 is clang 2.0
I'll try lldb.
> Does this problem happen on later versions of Mac OS X?
>
I don't have access to a later version (I could upgrade to 10.7 with some
effort).
>> In the Qt 5 version of the same code (hastily ported), I get a lockup
>> earlier, in a call to QFileDialog::getExistingDirectory. The callstack
>> contains
>>
>> mach_msg_trap
>> mach_msg
>> __CFRunLoopRun
>
> Is that the entire backtrace? It contains no Qt frames there, so it doesn't
> help me.
It's the top 3 elements. The (almost) full stack is:
0 mach_msg_trap 0x1022e0e3a
1 mach_msg 0x1022e15ef
2 __CFRunLoopRun 0x7fff8a4fd902
3 CFRunLoopRunSpecific 0x7fff8a4fcd8f
4 RunCurrentEventLoopInMode 0x7fff88cea7ee
5 ReceiveNextEventCommon 0x7fff88cea5f3
6 BlockUntilNextEventMatchingListInMode 0x7fff88cea4ac
7 _DPSNextEvent 0x7fff890b0eb2
8 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
0x7fff890b0801
9 -[NSApplication _realDoModalLoop:peek:] 0x7fff892ebdc3
10 -[NSApplication runModalForWindow:] 0x7fff892e9951
11 -[NSSavePanel runModal] 0x7fff8954f112
12 -[QNSOpenSavePanelDelegate runApplicationModalPanel]
0x103444e17
13 QCocoaFileDialogHelper::exec 0x103448bac
14 QDialog::exec 0x10052ee7f
15 QFileDialog::getExistingDirectory 0x10053c440
16 EngineeringDataModel::LoadAll TableModel.cpp 17 0x100033694
17 EngineeringDataModel::EngineeringDataModel TableModel.h 22
0x100028761
18 EngineeringDataModel::EngineeringDataModel TableModel.h 23
0x100019b75
19 MainWindow::MainWindow mainwindow.cpp 41 0x100006036
20 MainWindow::MainWindow mainwindow.cpp 156 0x100005f9d
>
> Also note that Mac OS X 10.6 is not a valid development target for Qt 5. You
> have to develop on 10.7 or 10.8, but you can deploy (and debug) there.
>
OK, but I shouldn't have problems with Qt 4.8., right?
A+
Paul
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