编译时出现这些错误
**** Build of configuration Debug for project hello_world_1 **** make -s all includes
Compiling zlg_avalon_ps2keyboard.c...
/cygdrive/c/altera/72/nios2eds/components/zlg_avalon_ps2keyboard/HAL/src/zlg_avalon_ps2keyboard.c:41:2: #error "No definition of PS2KEYBOARD core.\n"
/cygdrive/c/altera/72/nios2eds/components/zlg_avalon_ps2keyboard/HAL/src/zlg_avalon_ps2keyboard.c:49:2: #error "No definition of PS2KEYBOARD IRQ.\n"
make[1]: *** [obj/zlg_avalon_ps2keyboard.o] Error 1
make: *** [system_project] Error 2
Build completed in 5.062 seconds | 
