AW: AW: AW: [HACKERS] Re: tinterval - operator problems on AIX

[Zeugswetter Andreas SB]

> > Yes, the annoyance is, that localtime works for dates before 1970
> > but mktime doesn't. Best would probably be to assume no DST before
> > 1970 on AIX and IRIX.
> 
> That seems like a reasonable answer to me, especially since we have
> other platforms that behave that way.  How can we do this --- just
> test for isdst = -1 after the call, and assume that means failure?

Since we have tests of the form (tm_isdst > 0) ? ... in other parts of the code
this would imho be sufficient.
BTW, I would use the above check for DST in all parts of the code.
Currently we eighter have (tm_isdst ? ....) or the above form.

Andreas