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'..