compile -static 적용시 err

bs(s3c2440)에서 hpi app 컴파일시 에러 발생..

arm-none-linux-gnueabi-gcc -march=armv4t -mcpu=arm920t -static -o hpitest hpi.c
/tmp/ccc5qqiX.o: In function `sigioService':
hpi.c:(.text+0x14): undefined reference to `pthread_mutex_lock'
hpi.c:(.text+0x30): undefined reference to `pthread_cond_signal'
hpi.c:(.text+0x38): undefined reference to `pthread_mutex_unlock'
/tmp/ccc5qqiX.o: In function `HPIBurstRead':
hpi.c:(.text+0x9a8): undefined reference to `pthread_mutex_lock'
hpi.c:(.text+0xa0c): undefined reference to `pthread_cond_wait'
hpi.c:(.text+0xa58): undefined reference to `pthread_mutex_unlock'
collect2: ld returned 1 exit status
root@shubuntu:/home/sanghee/project/kctc/hpi_/app#
root@shubuntu:/home/sanghee/project/kctc/hpi_/app#
root@shubuntu:/home/sanghee/project/kctc/hpi_/app# arm-none-linux-gnueabi-gcc -march=armv4t -mcpu=arm920t -o hpitest hpi.c
root@shubuntu:/home/sanghee/project/kctc/hpi_/app#

* -static 은 안된단 왜??? 맞나?
-> Just "-lpthread" won't work when you link with "-static".

-> thread도 static으로 컴팔을 해놓는다 ??