cc  -c -I. -I../../../../arch -I../../../.. -I../../../../sys -DSUN4 -DSUN4C -DTIMEZONE="0" -DDST="0" -DSWAPPAGER -DVNODEPAGER -DDEVPAGER -DKTRACE -DRCONSOLE -DSYSVMSG -DSYSVSEM -DSYSVSHM -DCOMPAT_09 -DCOMPAT_10 -DFFS -DNFSSERVER -DNFSCLIENT -DKERNFS -DINET -DTCP_COMPAT_42 -DCOMPAT_43 -DLKM -DCOMPAT_SUNOS -DKERNEL -O2  ../../../../kern/sys_process.c
sh: warning: running as root with dot in PATH
../../../../kern/sys_process.c: In function `ptrace':
../../../../kern/sys_process.c:239: `PT_STEP' undeclared (first use this function)
../../../../kern/sys_process.c:239: (Each undeclared identifier is reported only once
../../../../kern/sys_process.c:239: for each function it appears in.)
*** Error code 1

Stop.

This is with today's -current.   

                /*
                 * From the 4.4BSD PRM:
                 * "Execution continues as in request PT_CONTINUE; however
                 * as soon as possible after execution of at least one
                 * instruction, execution stops again. [ ... ]"
                 */

i'm not sure how this is supposed to fit in with sparc hardware which
doesn't support single instruction stepping in hardware...

Chuck