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Bug#732551: make --foreign / qemu-user-static easier

On Wed, 2018-04-18 at 15:41 -0700, Vagrant Cascadian wrote:
> On 2013-12-18, Joey Hess <joeyh@debian.org> wrote:
> > If debootstrap installed qemu-user-static into the chroot
> > when --foreign was used, it could then immediately chroot in
> > and run commands (assuming the host system has binfmt-support
> > installed). 
> > 
> > This would allow debootstrap to go ahead and run the second stage
> > itself, under qemu emulation, and leave the user with a foreign chroot
> > that could be transparently chrooted into.
> With version 2.12~rc3 (currently in unstable), qemu-user-static doesn't
> require copying the qemu-ARCH-static binary into the chroot.
> You can simply call:
>   debootstrap --arch=ARCH sid CHROOT
> ... and it just works now, without any debootstrap --foreign or
> qemu-debootstrap wrappers!
> You might still want the binary copied into the chroot to make it easier
> if moving the chroot to another machine, but that seems well outside the
> scope of what debootstrap should worry about.

I think this depends on a new feature in binfmt_misc in Linux 4.8, so
the copy will also be needed on a jessie or wheezy host.


Ben Hutchings
It's easier to fight for one's principles than to live up to them.

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