>    What problems do you get if COMPAT_1[02] is left out?  (If the kernel build
>    breaks, please post the end of the build log with compiler errors; if it
>    fails at runtime, please note which syscalls don't work from ktrace(1).)
> 
> i just built a small kernel with COMPAT_SUNOS as the only COMPAT_xx
> option and it linked happily.  julian, what errors do you see?

Kernel config (oops just noticed COMPAT_43 there too) :

> ULTRAONE:
> 	options 	COMPAT_NETBSD32
> 	options 	COMPAT_SVR4_32
> ULTRAONE32:
> 	options 	COMPAT_43
> 	options 	COMPAT_SUNOS
> 	options 	COMPAT_SVR4

Build output :

> ld -n -T /usr/src/sys/arch/sparc64/conf/kern.ldscript -Ttext 01000000 -Tdata 01800000 -e start -X -o netbsd ${SYSTEM_OBJ} vers.o
> sunos32_sysent.o(.data+0x558):/usr/src/sys/compat/sunos32/sunos32_sysent.c: undefined reference to `compat_12_netbsd32_oswapon'
> sunos32_sysent.o(.data+0xa98):/usr/src/sys/compat/sunos32/sunos32_sysent.c: undefined reference to `netbsd32_compat_10_sys_semsys'
> sunos32_sysent.o(.data+0xaa8):/usr/src/sys/compat/sunos32/sunos32_sysent.c: undefined reference to `netbsd32_compat_10_sys_msgsys'
> sunos32_sysent.o(.data+0xab8):/usr/src/sys/compat/sunos32/sunos32_sysent.c: undefined reference to `netbsd32_compat_10_sys_shmsys'
> *** Error code 1

J

-- 
                    My other computer also runs NetBSD
                          http://www.netbsd.org/