Re: building dif. target system using qemu suit - Update.

[Frans de Boer]

On 9/5/21 21:18, Ken Moffat wrote:
> On Sun, Sep 05, 2021 at 08:24:08PM +0200, Frans de Boer wrote:
> > On 9/4/21 10:31, Frans de Boer wrote:
> > > LS,
> > >
> > > When I use qemu-aarch64to start a chroot jail and within the jail use
> > > qemu-aarch64-binfmt to cope with the different binary file headers, I
> > > can't use bash properly.
> > >
> > > That is, the -r and -x flags do not give the normal response. I tested
> > > also with -a, -d, -f, -e and -s, and they worked as expected. This
> > > behavior stops me from building a new (aarch64) system on a x86_64 build
> > > system. Within the chroot jail, I can start programs, run (bash) scripts
> > > as long as these scripts do not use the -r and -x tests. There are maybe
> > > more tests not working or just working, but these are the ones I tested.
> > >
> > > Normally, one would use a build system with the same target
> > > architecture, but that implies that you already have a target system up
> > > and running. Qemu with binfmt sounded as a possible solution, but as
> > > reported above, that seems not the case any longer.
> > >
> > > But maybe I do something wrong and thus seek advice how to proceed from
> > > here.
> > >
> > > Regards, Frans.
> > Tried the same with ppc64, same bad results.
> >
> > Frans.
> Frans,
>
> I assume you mean 'test -r ' and 'test -x ' ?
>
> I've never used qemu for compiling a different arch, but I guess
> that you have some version of both 'ls' and 'ldd' ?  Perhaps,
> running 'ls -l' against a file which does exist but fails the '-r'
> test, and 'ldd' against a file which is present and excepted to be
> executable (and not a script) might provide you with clues.
>
> ĸen
Yes, I did mean the 'test -r' and other 'test ..'. Sorry, was not clear 
about that.
When in the chroot jail, I type:

if test -r /usr/sbin/chroot; then echo y; fi
Nothing is displayed. Next:

ldd /usr/sbin/chroot, ends with:
ldd: error: you do not have read permission for `/usr/sbin/chroot'
(lfs chroot) root /# ls -l /usr/sbin/chroot
-rwxr-xr-x 1 0 0 203024 Sep  3 08:01 /usr/sbin/chroot

And, 'chroot --help' shows the help message from chroot.
Also, I can 'cat' or 'cp' the files without error.

Other files gave the same result.

--- Frans.

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