> You're right, not clear why I didn't spot it on Aarch64.  Hunk reverted.

The attached patch replaces it with an ad-hoc definition of setjmp, like the 
ones used for the coverage routines.  Tested on Aarch64/Linux with and without 
--enable-sjlj-exceptions and on IA-64/Linux without --enable-sjlj-exceptions.

Applied on the mainline as obvious.


2017-10-09  Eric Botcazou  <ebotcazou@adacore.com>

	* except.c (setjmp_fn): New global variable.
	(init_eh): Initialize it if DONT_USE_BUILTIN_SETJMP is defined.
	(sjlj_emit_function_enter): Call it instead of BUILTIN_SETJMP if
	DONT_USE_BUILTIN_SETJMP is defined.

-- 
Eric Botcazou