On Tue, Jan 18, 2011 at 06:08:37PM -0500, Frank Ch. Eigler wrote:
> -fexception allows a C library to participate in C++ exception
> handling. It does not cost anything except extra data tables in the
> ELF file. Its presence matters in cases where a C library is used by
> a C++ program, for example where the library may make a callback into
> the C++ program, and that callback might throw an exception. With
> -fexception, that exception will be propagated properly through the C
> library, to the outermost application. Without it, exceptions thrown
> from a callback may abort the program, even if the overall application
> wanted to catch it.
-fexceptions is also desirable for POSIX thread cancellation.
Jakub
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