Re: [HACKERS] DEC Alpha and HAVE_INT_TIMEZONE - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: [HACKERS] DEC Alpha and HAVE_INT_TIMEZONE
Date
Msg-id 199803201719.MAA08203@candle.pha.pa.us
Whole thread Raw
In response to DEC Alpha and HAVE_INT_TIMEZONE  (Dwayne Bailey <dwayne@mika.com>)
List pgsql-hackers
>
> -----BEGIN PGP SIGNED MESSAGE-----
>
> I've finally figured out why the Alpha fails when
> HAVE_INT_TIMEZONE is defined.  As far as I'm concerned, somebody
> at DEC should be shot.  The problem has nothing to do with
> postgresql code.  The symbol 'timezone' is defined in two
> different libraries, as two very different things!  libc.a
> defines it as a global variable of type long, as documented in
> the timezone(3) manpage.  However, libbsd.a defines a function
> named timezone.  Since we link explicitly to -lbsd, guess which
> definition gets linked into the program?  We're using the address
> of that function as our timezone offset.  Well, the low four
> bytes of the address, anyway.

I assume they are supporting both uses for the symbol.  I recommend
hard-coding the stuff into the port, and hopefully it will work.  Please
send it patches soon.  If it is alpha-specific, we can fold it into the
mega-patch, because alpha was broken in 6.3 anyway.

>
> As far as I can tell, we don't require any of the routines used
> in libbsd.a.  I'm about to do some more testing to confirm this,
> so hopefully a patch will be on its way soon.  Up to this point,
> all I've recompiled under this new model is postgres, which links
> fine, and runs without error.  The only failure on the date tests
> that I noticed seemed to be using PST when it should have been
> PDT.  I suspect that's an artifact of where I am (Michigan)
> which, according to the /etc/zoneinfo/localtime source, didn't
> observe DST between 1968 and 1973.

Yea, I see this sometimes too on BSDI.

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