求助：自己在cygwin上编译arm-elf工具链出错

myleone

从uclinx网站上下的arm-elf-tools源代码，都放在用户目录下，仅修改build-uclinux-tools.sh文件如下：
。。。
MAKE=make
PATCH=patch
ELF2FLT="$BASEDIR/elf2flt"
UCLIBC="$BASEDIR/uClibc"
KERNEL="$BASEDIR/armtool/uClinux-dist/linux-2.4.x"
TARGET=arm-elf
PREFIX=/tmp/tools
PATH="${PREFIX}/bin:$PATH"; export PATH
CYGWIN=cygwin-
PATCH=/usr/bin/patch
。。。

编译到第三步出错。。！：
STAGE 2 - complete
--------------------------------------------------------
STAGE 3 - needs building
/bin/sh: line 1: arm-elf-gcc: command not found
/bin/sh: line 1: arm-elf-gcc: command not found
rm -rf include/bits
mkdir -p include/bits
./extra/config/conf: ./extra/config/conf: cannot execute binary file
make: *** [oldconfig] Error 126

请问各位DX，该怎么搞啊？？谢了！

wsm

/bin/sh: line 1: arm-elf-gcc: command not found