C++ exception problems in mingw cross compiler

[Toralf Lund <toralf at procaptura dot com>]

I have a cross compiler toolchain with Linux host and MinGW target built 
(by me) "the usual way". GCC version is 3.4.6.

I've used this for some time now, and it has seemed to work just fine. 
However, yesterday I realised that C++ exceptions don't really work. The 
exception code builds just fine, and exceptions are thrown where 
appropriate, but it seems like catch() just doesn't catch anything. Not 
even catch(...). So whenever I run code that raises an exception, I 
always get a message saying that it has died due to an unhandled 
exception - even when there is a matching catch() statement that's 
proven to work on other OSes.

Does anyone have any idea about what might cause this? I mean, are there 
any well-known issues with exceptions processing? Or anything special I 
have to keep in mind when building the compiler, in order to get working 
exceptions?

I know you can't tell me what's wrong with my toolchain unless you see 
the *exact* build setup, but what I mean to ask is where to start 
looking for the cause of these problems . - Before I build all over 
again to be able to see what's going on.

- Toralf

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