[Ada] PR ada/22301

[Arnaud Charlet <charlet at adacore dot com>]

Tested on i686-linux, committed on mainline.

Fix for PR ada/22301 (build failure after unwind.h move)
The names of a couple of "standard" routines for unwinding/propagation
actually vary depending on the underlying GCC scheme for exception handling
(SJLJ or DWARF). We need a consistently named interface to import from
a-except, so wrappers are defined here.

Besides, eventhough the compiler is never setup to use the GCC propagation
circuitry, it still relies on exceptions internally and part of the sources
to handle to exceptions are shared with the run-time library.  We provide
dummy definitions for the wrappers to satisfy the linker in this case.

The types to be used by those wrappers in the run-time library are target
types exported by unwind.h.  We used to piggyback on them for the compiler
stubs, but there is no guarantee that unwind.h is always in sight so we
define our own set below.  These are dummy types as the wrappers are never
called in the compiler case.

2005-07-07  Olivier Hainque  <hainque@adacore.com>

	PR ada/22301

	* raise.c: Only include unwind.h if IN_RTS, and provide dummy type
	definitions for the Unwind wrappers in the compiler case.

Attachment: difs.6
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