[RFA] PR libobjc/27466 unexpected exception handler V2

[David Ayers]

Hello,

so here is V2 of a fix for PR27466, adding support for an unexpected
exception handler which is needed by libraries to use libobjc's
exception support.

This patch is derived from the patch posted at

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27466

yet it uses a global variables as a hook, as is usually done in libobjc.

This patch has been bootstrapped and regression tested on i686-pc-linux-gnu.

OK to commit to trunk?

2009-02-23  Richard Frith-Macdonald  <rfm@gnu.org>
            David Ayers  <ayers@fsfe.org>

        PR libobjc/27466
        * objc/objc-api.h (_objc_unexpected_exception): Declare new
	  hook.
        * exception.c (objc_exception_throw): Use hook.
        * libobjc.def (_objc_unexpected_exception): Export hook.

2009-02-23  David Ayers  <ayers@fsfe.org>

        PR libobjc/27466
        * objc/execute/exceptions/handler-1.m. New.


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