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Re: Obsoleting IRIX < 6.5, Solaris 7, and Tru64 UNIX < V5.1
- From: Richard Sandiford <rdsandiford at googlemail dot com>
- To: Rainer Orth <ro at CeBiTec dot Uni-Bielefeld dot DE>
- Cc: gcc at gcc dot gnu dot org
- Date: Sat, 30 Jan 2010 10:27:17 +0000
- Subject: Re: Obsoleting IRIX < 6.5, Solaris 7, and Tru64 UNIX < V5.1
- References: <yddbpgf4io8.fsf@manam.CeBiTec.Uni-Bielefeld.DE>
Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> writes:
> * IRIX before 6.5:
> ** IRIX 5.3 entered retired mode by the end of 1998. Patches are no
> longer available from support.sgi.com, and a full bootstrap and test
> cycle takes 8 1/2 days on the machines I have available, even without
> ** IRIX 6.2 entered retired mode by 01/2003 and patches aren't available
> either. I don't have any machine available running that version.
> ** IRIX 6.3 and 6.4 were only ever released for specific hardware.
> ** With a few exceptions, all machines supported by IRIX 6.[2-4] are
> supported by IRIX 6.5, too (at least until 6.5.22).
Sounds like a good plan ;)
> ** I also consider obsoleting support for the O32 ABI: the SGI linker used
> is different from the N32/N64 ld, and has repeatedly caused problems
> which couldn't be resolved even when SGI still had full IRIX
> support. Also, the ISO C99 support in libc is only available for the
> N32 and N64 ABIs.
Yeah, that's a difficult one. On the one hand, I can see that it
doesn't make sense to support an ABI that was there for compatibility
with IRIX 5 and earlier (which we're declaring obselete). On the other,
I think o32 worked better with the GNU linker than it did with the
SGI linker. E.g. I remember hitting GOT overflow problems with the
SGI o32 linker (which didn't support multiple GOTs) that were solved
by using the GNU linker.
But that was a long time ago (binutils 2.15?) and I don't know how
well it works now. And I still can't see any reason why IRIX 6.5
users would prefer o32 over n32. I certainly don't object to
removing o32 support from the IRIX port.