Hi Ruben,
Thanks for pointing this out, the problem is indeed that libstdc++ is
linked to the dynamic ligcc while the program (as above) links to the
static version of libgcc. There are two seperate copies of libgcc that do
not share exception information resulting in uncaught exception.
If -static is added than only one static copy of libgcc is linked and the
exception is caught.
Could the compiler enforce "If you link to static libgcc, you should also
link libstdc++ statically" or at least warn about it?
It would save users such mysterious bugs resulting from having two copies
of ligcc around.
Yaron
2014-08-25 11:23 GMT+03:00 Ruben Van Boxem <vanboxem.ru...@gmail.com>:
> 2014-08-24 23:48 GMT+02:00 Yaron Keren <yaron.ke...@gmail.com>:
>
> Hi Tai,
>>
>> Thanks for looking into this. You are correct the right frontend should
>> be used, however this isn't the root of the problem.
>> It works since g++ defaults to -shared-libgcc while gcc defaults to
>> -static-libgcc.
>> If you force g++ to static link libgcc, the exception is still uncaught:
>>
>> g++ -static-libgcc a.cpp -lstdc++ & a
>>
>> Yaron
>>
>
> If you link to static libgcc, you should also link libstdc++ statically.
> It would make no sense to do otherwise. A shortcut for all this would be to
> use "-static", but this will also force you to use static versions of all
> other libraries you link, which may or may not be what you want.
>
> Ruben
>
>
>>
>> 2014-08-25 0:18 GMT+03:00 Kai Tietz <ktiet...@googlemail.com>:
>>
>>> Hi Yaron,
>>>
>>> I can't reproduce your reported issue by using proper frontends. You
>>> shouldn't use gcc frontend. Instead use g++. Later automatically
>>> adds proper link-libraries for c++ automatically. So you don't need
>>> to add -lstdc++ manual.
>>>
>>> By using 'g++ -o a a.cpp && ./a' it works for me as expected.
>>>
>>> Kai
>>>
>>>
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>>
>>
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