Re: Bad system call errors during an upgrade of -current

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Mon, 10 Feb 2020 19:07:50 -0600
    From:        Dustin Marquess <dmarquess%gmail.com@localhost>
    Message-ID:  <CAJpsHY5cagFPzhkzbnLOgdymOpbANZ-SCbQQFu5m5n30UUxgLQ%mail.gmail.com@localhost>

  | Looking at my history, I did:
  |
  | ./build.sh -O ../obj -T ../tools tools distribution kernel=MYCONFIG modules

As Kamil suggested, this will be your problem.

To start with, use a GENERIC kernel which will have all the correct
COMPAT_xxx options defined.   Once you have the new userland installed
you can build your own tailored kernel and run that.

You can also add the needed COMPAT_xxx options to your kernel config
file, but doing it that way can take more try & retry until you finally
get everything needed.

kre