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

[Zeugswetter Andreas SB]

> The time zone is now evaluated in the time zone of the result, rather
> than the input, using system support routines from libc. 

Ok, I have the answer.

On AIX mktime(3) leaves tm_isdst at -1 if it does not have timezone 
info for that particular year and returns -1.
>From man page:
        The mktime subroutine returns the specified time in seconds encoded as a value 
of
        type time_t. If the time cannot be represented, the function returns the value
        (time_t)-1.

The following code then makes savings time out of the -1.
                                        tz = (tm->tm_isdst ? (timezone - 3600) : 
timezone);

What now ?

Andreas