Signal 12 on make update (or any target in /usrc/src)

Konstantin Belousov kostikbel at
Wed Aug 10 14:41:46 UTC 2016

On Wed, Aug 10, 2016 at 10:33:23AM -0400, Matteo Riondato wrote:
> Hi all,
> I recently upgraded from a late June (pre 11-branch, as far as I can tell) revision to r303771.
> Now, running ???make update??? (or buildworld, ???) in /usr/src fails with a signal 12:
> matteo at triton:/usr/src$ sudo make update
> Password:
> *** Signal 12

You did not updated, I think.  You, most likely, inly updated the kernel,
but left the old userspace in place, at least libc.

Signal 12 is SIGSYS, which means that the program tries to use a syscall
not implemented by the kernel.  My guess is that your kernel lacks option
COMPAT_FREEBSD10, and the failing syscall is pipe(2).

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