(Accidentally didn't reply all the first time, sorry)
On 20-Mar-14 12:38, Jonathan Wakely wrote:
On 20 March 2014 15:50, Eric Wolf wrote:
I really think, static initializations and exceptions are the problem,
because if I placed main in a C source file and compile it with gcc,
how are the initializations done? How are uncaught exceptions handled?
Using the DWARF-based exception mechanism the compiler looks up the
stack for a suitable catch handler and if none is found (either
because the higher stack frames are C++ functions but don't catch the
exception, or because they are not C++ functions at all) then
std::terminate() is called at the throw site.
So I believe an uncaught exception will terminate the process
irrespective of what language main() is written in.
I agree with this.
Global ctors/dtors are a separate issue, I'm not sure how they're
handled if main() isn't written in C++.
Shouldn't these be handled in crt*.o by being placed in .dtors/.ctors?
As long as these are linked in by gcc/g++ then everything should be fine
(as a matter of fact the C compiler lets you hook into this
functionality using attributes IIRC, so it needs to provide that as
well...).
