>	christos, could you tell me why is the signal.h 1.20 -> 1.21 change?
>	it looks to me that:
>	- having consistent declaration of "errno" is a good thing.
>	- inlined version of sig{add,del}set will not compile due to the
>	  assignment to function result(!), like:
>		(__errno()) = 22;
>	- luckily, the inlined version of sig{add,del}set will never be used,
>	  due to __RENAME().

	i was confused about the 2nd bullet.  it works fine.
	the third bullet confuses me a little.

itojun