$ make zImage
...
gcc -D__KERNEL__ -I/home/yuri/kernel/linux/include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -D__SMP__ -pipe -fno-strength-reduce -m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2 -DCPU=586 -D__SMP__ -c -o sock.o sock.c
sock.c: In function `do_ncp_rpc_call':
sock.c:127: structure has no member named `sa_handler'
sock.c:129: structure has no member named `sa_handler'
sock.c:132: warning: implicit declaration of function `siginitmaskinv'
sock.c:281: `old_mask' undeclared (first use this function)
sock.c:281: (Each undeclared identifier is reported only once
sock.c:281: for each function it appears in.)
make[3]: *** [sock.o] Error 1
make[3]: Leaving directory `/home/yuri/kernel/linux/fs/ncpfs'
make[2]: *** [first_rule] Error 2
make[2]: Leaving directory `/home/yuri/kernel/linux/fs/ncpfs'
make[1]: *** [sub_dirs] Error 2
make[1]: Leaving directory `/home/yuri/kernel/linux/fs'
make: *** [linuxsubdirs] Error 2