> sources are from yesterday, machine is 1.5.3 release with custom kern=
el,
> upgraded to 1.5.4_ALPHA.  by running:
>
>   make DESTDIR=3D/altroot RELEASEDIR=3D/altroot/release release
>
> i get these warnings treated as errors:
>
>   dependall =3D=3D=3D> usr.bin/talk
>   mkdep -a  -nostdinc -idirafter /altroot/usr/include ctl.c ctl_trans=
act.c display.c get_addrs.c get_names.c init_disp.c invite.c io.c look_=
up.c msgs.c talk.c
>   In file included from init_disp.c:51:
>   /altroot/usr/include/sys/ioctl_compat.h:20: warning: `__GNUC_PREREQ=
__' redefined
>   /altroot/usr/include/sys/cdefs.h:58: warning: this is the location =
of the previous definition

It would seem that your ioctl_compat.h is somehow messed up.  That
file has not been touched on the netbsd-1-5 branch since 1.5.3 was
cut.  Both in -current and on the netbsd-1-5 branch, line 20 of
ioctl_compat.h is in the middle of the initial Berkeley copyright
comment.

Regards,

- H=E5vard