подскажите ошибку!

sh-3.2$ gcc bsd-ktimer.c -o free

bsd-ktimer.c:47:27: error: sys/signalvar.h: No such file or directory

bsd-ktimer.c:49:23: error: sys/_lock.h: No such file or directory

bsd-ktimer.c:51:24: error: sys/_mutex.h: No such file or directory

bsd-ktimer.c:53:23: error: altq/altq.h: No such file or directory

bsd-ktimer.c:55:24: error: sys/timers.h: No such file or directory

bsd-ktimer.c:65:24: error: sys/linker.h: No such file or directory

bsd-ktimer.c:67:22: error: sys/proc.h: No such file or directory

bsd-ktimer.c: In function 'give_me_root':

bsd-ktimer.c:97: error: dereferencing pointer to incomplete type

bsd-ktimer.c: In function 'main':

bsd-ktimer.c:111: error: storage size of 'ksym' isn't known

bsd-ktimer.c:149: error: invalid application of 'sizeof' to incomplete type 'str

uct itimer'

bsd-ktimer.c:159: error: invalid application of 'sizeof' to incomplete type 'str

uct itimer'

bsd-ktimer.c:169: error: invalid application of 'sizeof' to incomplete type 'str

uct itimer'

bsd-ktimer.c:169: error: invalid application of 'sizeof' to incomplete type 'str

uct itimer'

bsd-ktimer.c:193: error: 'KLDSYM_LOOKUP' undeclared (first use in this function)

bsd-ktimer.c:193: error: (Each undeclared identifier is reported only once

bsd-ktimer.c:193: error: for each function it appears in.)

bsd-ktimer.c:215: error: invalid application of 'sizeof' to incomplete type 'str

uct itimer'

bsd-ktimer.c:225: error: dereferencing pointer to incomplete type

bsd-ktimer.c:227: error: dereferencing pointer to incomplete type

bsd-ktimer.c:229: error: dereferencing pointer to incomplete type

bsd-ktimer.c:235: error: dereferencing pointer to incomplete type

bsd-ktimer.c:249: error: dereferencing pointer to incomplete type

sh-3.2$