[Development] Choosing a new MinGW for Qt 5

[Peter Kümmel]

On 01.09.2012 12:47, Peter Kümmel wrote:
> On 01.09.2012 12:39, Thiago Macieira wrote:
>> On sábado, 1 de setembro de 2012 12.23.31, Peter Kümmel wrote:
>>>        "As a general rule, you should choose the default SJLJ packages,
>>>         unless you know you need faster exception handling and can guarantee
>>>         you'll never need to unwind through non-DW2-compiled stack frames
>>>         (such as a Windows callback)"
>>>        Using SJLJ "can work across code that has not been compiled with
>>>        GCC or that does not have call-stack unwinding information."
>>
>> We don't need that.
>>
>> Unwinding the stack through C functions and code that isn't exception-safe in
>> the first place is stupid. The only sane outcome of doing that is a crash.
>>
>> What's more, all Qt libraries aside from QtCore and QtXmlPatterns are built
>> with exceptions disabled. That means that if your code leaks an exception
>> through a GUI event loop or a signal from one of those classes, the
>> application will crash.
>>
>> So we don't need SJLJ.
>>
>
> So you think it is possible to use DW2 for 32 bit binaries?
>
> What happens if a binary compiled with GCC/DW2 calls a
> C++ function in a Dll compiled with MSVC and this function
> throws an exception?

The exception could not be catched?

But is this a valid scenario? Catching exceptions
from a 3rd party C++ library compiled with a
different compiler?

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