...like so:

    compile  powernow/powernow_k8.o
/u/NetBSD/src/sys/arch/x86/x86/powernow_k8.c: In function 'k8_powernow_destroy':
/u/NetBSD/src/sys/arch/x86/x86/powernow_k8.c:486: error: 'cstate' undeclared (first use in this function)
/u/NetBSD/src/sys/arch/x86/x86/powernow_k8.c:486: error: (Each undeclared identifier is reported only once
/u/NetBSD/src/sys/arch/x86/x86/powernow_k8.c:486: error: for each function it appears in.)
--- powernow_k8.o ---
*** [powernow_k8.o] Error code 1
1 error

nbmake: stopped in /u/NetBSD/src/sys/lkm/arch/i386/powernow
--- dependall ---
*** [dependall] Error code 2
1 error