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To: gentoo-alt@g.o
From: Fabian Groffen <grobian@g.o>
Subject: Re: [prefix] ia64-hpux keyword and 32bit/64bit
Date: Thu, 15 May 2008 12:32:05 +0200
On 15-05-2008 11:58:50 +0200, Michael Haubenwallner wrote:
> Hi,
> 
> While 'ia64-hpux' is a multilib platform, and the compilers (HP-cc, gcc)
> support this, their default output still is 32bit.
> 
> This is the reason why currently the 'ia64-hpux' keyword in prefix
> stands for 32bit, but IMO this is just wrong.

Feels really wrong indeed.  They just do like any other UNIX does, but
on a 64-bits chip.

> What I could think of is something like this:
> 
> 1) For "CHOST=ia64-hp-hpux*", patch toolchain (or set CFLAGS/LDFLAGS) to
> default to 64bit, and use keyword 'ia64-hpux'.

We have similar patches for Solaris on x64, so I don't think this is a
big issue to do.

> 2a) Define a new "CHOST=ia64_32-hp-hpux*", patch toolchain to understand
> this (like for x64-solaris iirc?), and use keyword 'ia64_32-hpux'.

Quite ugly, but I guess sort of necessary.

> 2b) Or should this better be named "CHOST=ia32-hp-hpux*" and keyword
> 'ia32-hpux' ?

Question is whether ia32 technically is what you get with this 32-bits
emulation on ia64.  (I thought ia32 was just regular x86 stuff, but I
can be wrong here.  The ia64-architecture isn't compatible with i386 IMO.)

> How would this be confusing with the fact that 'ia32' is equal to 'x86'
> from Intel's POV (they use 'x64' for 'x86' + EM64T extension IIRC).

Ah, I should "read ahead".

Yeah.  x64 is kind of loaded with negative feelings from the other
Gentoo folks, basically because Microsoft uses it.  However, I still
like it that we chose to use it, as it's more generic than amd64 is.
(Convert amd64-linux to x64-linux as well?)

How necessary is the 32-bits environment for hpux?  I think ia64_32
comes closest to something we've seen before (x86_64), so we better use
that then in the CHOST.  Makes a bit of a problem what we're going to
use in our keywords.  I think ia32 is a techical unforgivable
suggestion, i32 could do for me, though not really a beauty.  Maybe we
really have no choice but to keep the keyword the same (the arch
technically IS ia64, right?) as we're dealing with an emulation mode,
and only have the profile to switch to the right CHOST (and hence get
the right compiler)?  Not sure what the packages broken/wordsize ratio
is for HPUX in this case.


-- 
Fabian Groffen
Gentoo on a different level
-- 
gentoo-alt@g.o mailing list


Replies:
Re: [prefix] ia64-hpux keyword and 32bit/64bit
-- Michael Haubenwallner
References:
[prefix] ia64-hpux keyword and 32bit/64bit
-- Michael Haubenwallner
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Updated Jun 17, 2009

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