[multiple changes]

[multiple changes]

2015-10-23  Ed Schonberg  <schonberg@adacore.com>

	* sem_util.adb (Is_Iterator, Is_Reversible_iterator): Use
	root type to determine whether the type is a descendant of the
	corresponding interface type, so take into account multiple
	levels of subtypes and derivations.

2015-10-23  Olivier Hainque  <hainque@adacore.com>

	* tracebak.c: Refine selection of GCC/GENERIC_UNWINDER for
	tracebacks on x86 & x86_64.
	(x86 & x86_64): If !SJLJ, always pick the
	GCC_UNWINDER for x86_64 (not only on linux).
	* sem_util.ads: Minor fix in comment.

From-SVN: r229239