Re: PATCH: Add x32 support to config.guess

[Mike Frysinger]

On 23 Feb 2015 05:29, H.J. Lu wrote:
> On Sun, Aug 19, 2012 at 2:47 AM, Ben Elliston <address@hidden> wrote:
> >> There are 12 existing set_cc_for_build usages in config.guess.  I
> >> don't think it is reasonable to require x32 not to use it without
> >> providing an alternative.  If you want to remove set_cc_for_build,
> >> one extra usage doesn't make it much harder to do.
> >
> > That's what the person asking for the 12th instance said ..
> >
> > I don't think it's reasonable for config.guess to depend on a C
> > compiler.  You would not believe how many problem reports I get due to
> > this.
> 
> I realized that config.guess is more broken than I thought.  Depending
> on "uname -m" doesn't work with 64-bit kernel and 32-bit user space:

it's always been this way:

$ uname -m
x86_64
$ setarch i386 uname -m
i686

$ uname -m
s390x
$ setarch linux32 uname -m
s390

i avoid it on my own systems by doing something like:
  init=/usr/bin/setarch linux32 /sbin/init

that way all processes spawned get the inherited value.
-mike

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