NOOB question on build error

hm..

i figured its due to path settings..

here is an error msg:

make -s all

Compiling alt_alarm_start.c...

/cygdrive/c/altera/kits/nios2/components/altera_hal/HAL/src/alt_alarm_start.c:46:19: errno.h: No such file or directory

In file included from /cygdrive/c/altera/kits/nios2/components/altera_hal/HAL/src/alt_alarm_start.c:49:

/cygdrive/c/altera/kits/nios2/components/altera_nios2/HAL/inc/sys/alt_irq.h:39:19: errno.h: No such file or directory

/cygdrive/c/altera/kits/nios2/components/altera_hal/HAL/src/alt_alarm_start.c: In function `alt_alarm_start':

/cygdrive/c/altera/kits/nios2/components/altera_hal/HAL/src/alt_alarm_start.c:101: error: `EINVAL' undeclared (first use in this function)

/cygdrive/c/altera/kits/nios2/components/altera_hal/HAL/src/alt_alarm_start.c:101: error: (Each undeclared identifier is reported only once

/cygdrive/c/altera/kits/nios2/components/altera_hal/HAL/src/alt_alarm_start.c:101: error: for each function it appears in.)

/cygdrive/c/altera/kits/nios2/components/altera_hal/HAL/src/alt_alarm_start.c:106: error: `ENOTSUP' undeclared (first use in this function)

make: *** [obj/alt_alarm_start.o] Error 1

Build completed

can anyone help me now?