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Exception handling and shared libraries

Hi,

I have a question about the settings in Xcode to generate code that handles exception correctly.

We have developed a generic shared c++ library in one Xcode project in which we implemented several exception handling classes that inherit from std::exception. Now, we are working on a new c++ project in Xcode where we use this library together with a lot of new classes and also other shared libraries (eg. mysql++). Everything compiles without any problem and runs fine except when an exception is thrown from within the used shared libraries. These exceptions are not caught since the type does not seem to be the same.

I have searched quite a bit for information about this problem but I have never found a satisfactory answer on how to tackle this problem. As far as I understand it, the problem originates from the way the shared library is constructed and how objects in the library are referenced. So my guess is that there should be a set of options to Xcode or gcc or the linker to avoid this.

Has anyone any experience with this since I have tried several combination of options (like -fexceptions, -Bsymbolic) but none of them seemed to have any effect.

Gert

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