How to make squashfs of 3.1 with mksquash 4.0

[Bruno Wolff III]

On Mon, Mar 21, 2011 at 16:35:59 +0800,
  Eric Zhong <ericiszhongwenjia at gmail.com> wrote:
> I have to make a install.img for F10 on F13
> Squashfs Version : F13 = 4.0 ; F10 = 3.1
> I can't mount 4.0 on F10.
> so How can i make a version of 3.1 on F13 ? Are there any options ?

As far as I can tell, mksquashfs doesn't have a way to build using older
formats. So you either need to use an older version of mksquashfs on the
F13 system or you need to use a newer kernel (that supports the 4.0 format)
for your F10 build.