ERR#78 'function not implemented'

[Konstantin Belousov]

On Wed, May 22, 2019 at 06:16:03AM -0700, Enji Cooper wrote:
> 
> > On May 22, 2019, at 05:57, Daniel Braniss <danny at cs.huji.ac.il> wrote:
> > 
> >> On 22 May 2019, at 11:38, Andrey V. Elsukov <bu7cher at yandex.ru> wrote:
> >> 
> >> On 21.05.2019 19:03, Daniel Braniss wrote:
> >>> Hi,
> >>> Im using a freebsd-stable-11.1-STABLE to cross compile for arm,  I have been doing it for some time
> >>> without any issues, but today I decided to try out release.sh and it failes.
> >>> I have run the ‘bad’ command:
> >> 
> >>> -- UNKNOWN FreeBSD ELF64 SYSCALL 568 --
> >>> #568()                                           ERR#78 'Function not implemented'
> >>> SIGNAL 12 (SIGSYS) code=SI_KERNEL
> >>> process killed, signal = 12 (core dumped)
> >> 
> >> Hi,
> >> 
> >> Your kernel is too old to be able run this binary. Syscall 568 is
> >> funlinkat(2), it was introduced in r345982.
> >> 
> >> https://svnweb.freebsd.org/base?view=revision&revision=345982
> >> 
> > hi,
> > thanks, so that raises a new question:
> >    Q: to use release.sh one needs to be running the latest current?
> 
> In theory, liblegacy and ITOOLS should be taking care of some of this. A binary is being run from the install which should be run from the system.
> 
liblegacy only relevant when your target is the old host system.  It cannot
help with running binary built on newer system.

> That being said, you should be running a more recent release of 11.x or stable/11.
No.

You cannot run 12 binaries on 11 at all (practically any binary would fail),
and you cannot run some HEAD binaries on 12.