请高手看看我的连接出错信息？

sunshan

armv4l-unknown-linux-gcc  -c -o head.o head.s
armv4l-unknown-linux-gcc -c -o init.o init.c
armv4l-unknown-linux-gcc -c -o serial.o serial.c
armv4l-unknown-linux-gcc -c -o interrupt.o interrupt.c
interrupt.c: In function `EINT_Handle':
interrupt.c:20: warning: passing arg 1 of `TchScr_GetScrXY' from incompatible pointer type
interrupt.c:20: warning: passing arg 2 of `TchScr_GetScrXY' from incompatible pointer type
armv4l-unknown-linux-gcc -c -o tchscr.o tchscr.c
armv4l-unknown-linux-gcc -c -o main.o main.c
armv4l-unknown-linux-ld -Ttchscr.lds  head.o init.o main.o serial.o interrupt.o tchscr.o -o tchscr_tmp.o
serial.o: In function `TchScr_GetScrXY':
serial.o(.text+0x5c0): undefined reference to `__divsi3'
serial.o(.text+0x5c0): relocation truncated to fit: R_ARM_PC24 __divsi3
serial.o(.text+0x610): undefined reference to `__divsi3'
serial.o(.text+0x610): relocation truncated to fit: R_ARM_PC24 __divsi3
make: *** [tchscr] 错误 1
－－divsi3是什么意思？我程序里跟本没有这个东西。