/opt/crosstool/gcc-4.1.0-glibc-2.3.2/arm-linux/lib/gcc/arm-linux/4.1.0 -lgcc \
-Map u-boot.map -o u-boot
arm-linux-ld: ERROR: /opt/crosstool/gcc-4.1.0-glibc-2.3.2/arm-linux/lib/gcc/arm-linux/4.1.0/libgcc.a(_udivdi3.o) uses hardware FP, whereas u-boot uses software FP
arm-linux-ld: failed to merge target specific data of file /opt/crosstool/gcc-4.1.0-glibc-2.3.2/arm-linux/lib/gcc/arm-linux/4.1.0/libgcc.a(_udivdi3.o)
arm-linux-ld: ERROR: /opt/crosstool/gcc-4.1.0-glibc-2.3.2/arm-linux/lib/gcc/arm-linux/4.1.0/libgcc.a(_clz.o) uses hardware FP, whereas u-boot uses software FP
arm-linux-ld: failed to merge target specific data of file /opt/crosstool/gcc-4.1.0-glibc-2.3.2/arm-linux/lib/gcc/arm-linux/4.1.0/libgcc.a(_clz.o)
make: *** [u-boot] 错误 1
-Map u-boot.map -o u-boot
arm-linux-ld: ERROR: /opt/crosstool/gcc-4.1.0-glibc-2.3.2/arm-linux/lib/gcc/arm-linux/4.1.0/libgcc.a(_udivdi3.o) uses hardware FP, whereas u-boot uses software FP
arm-linux-ld: failed to merge target specific data of file /opt/crosstool/gcc-4.1.0-glibc-2.3.2/arm-linux/lib/gcc/arm-linux/4.1.0/libgcc.a(_udivdi3.o)
arm-linux-ld: ERROR: /opt/crosstool/gcc-4.1.0-glibc-2.3.2/arm-linux/lib/gcc/arm-linux/4.1.0/libgcc.a(_clz.o) uses hardware FP, whereas u-boot uses software FP
arm-linux-ld: failed to merge target specific data of file /opt/crosstool/gcc-4.1.0-glibc-2.3.2/arm-linux/lib/gcc/arm-linux/4.1.0/libgcc.a(_clz.o)
make: *** [u-boot] 错误 1
以上错误为编译器的软浮点问题，解决办法就是去掉makefile里面的浮点相关编译，建议你直接用3.4.5编译，这个问题就解决了。或者去掉"$CPU/cpu_type/config.mk"文件中的 -msoft-float