undefined reference to `__aeabi_dmul'
undefined reference to`__aeabi_dadd'
undefined reference to`__aeabi_dsub'
undefined reference to`__aeabi_ddiv'
* + - /没有定义
LD -lgcc -L/opt/FriendlyARM/toolschain/4.4.3/lib/gcc/arm-none-linux-gnueabi/4.4.3