Re: [gentoo-user] Re: [was cross-compile attempt] 32bit chroot

[Mick]

On Monday 01 Aug 2016 18:57:53 Mick wrote:
> On Monday 01 Aug 2016 17:32:58 Mick wrote:
> > On Monday 01 Aug 2016 12:19:41 waltdnes@××××××××.org wrote:
> > > > What chroot() actually does is fairly simple, it modifies pathname
> > > > lookups for a process and its children so that any reference to a path
> > > > starting '/' will effectively have the new root, which is passed as
> > > > the single argument, prepended onto the path. The current working
> > > > directory is left unchanged and relative paths can still refer to
> > > > files outside of the new root.
> >
> > Thanks Walter, it's present along with the whole of the 32bit OS fs:
> >
> > gentoo-32bit # ls -la /mnt/iso/gentoo-32bit/bin/bash
> > -rwxr-xr-x 1 root root 677244 Jan 16  2016 /mnt/iso/gentoo-32bit/bin/bash
> >
> > gentoo-32bit # file /mnt/iso/gentoo-32bit/bin/bash
> > /mnt/iso/gentoo-32bit/bin/bash: ELF 32-bit LSB executable, Intel 80386,
> > version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for
> > GNU/Linux 2.6.32, stripped
> >
> >
> > Am I missing something in the amd64 kernel to be able to execute 32bit
> > code?
> No, I was missing the *whole* of the 32bit fs /lib directory.  O_O
>
> Apologies for the noise.

I think libreoffice, chromium and firefox will be compiled in a chroot from now 
on and then emerged as binaries.  This is the difference for libreoffice:

     Sat Aug 29 06:09:09 2015 >>> app-office/libreoffice-4.4.4.3
       merge time: 15 hours, 34 minutes and 2 seconds.

     Sun Sep 13 01:36:03 2015 >>> app-office/libreoffice-4.4.5.2
       merge time: 15 hours, 13 minutes and 17 seconds.

     Sun Nov 29 02:30:04 2015 >>> app-office/libreoffice-5.0.3.2
       merge time: 16 hours, 54 minutes and 28 seconds.

     Sun Mar 27 09:31:20 2016 >>> app-office/libreoffice-5.0.5.2
       merge time: 17 hours and 8 seconds.

     Mon Aug  1 22:17:15 2016 >>> app-office/libreoffice-5.1.4.2
       merge time: 1 minute and 31 seconds.

(chromium takes even longer!)  :-)

-- 
Regards,
Mick