now,I have the same problem with yours.
**** Build of configuration Debug for project hello_world_0 ****
make -s all includes
Compiling hello_world.c...
Linking hello_world_0.elf...
/cygdrive/e/JIDA/9.10next_stage/IN_FIR300why/hello_world_0_syslib/Debug/libhello_world_0_syslib.a(alt_main.o)(.text+0x14): In function `alt_main':
/cygdrive/c/altera/90/nios2eds/components/altera_hal/HAL/src/alt_main.c:102: undefined reference to `alt_irq_init'
collect2: ld returned 1 exit status
make: *** [hello_world_0.elf] Error 1
Build completed in 3.078 seconds
Did you solve this problem? How did you solve it? Can you share it with me?