EEPW论坛

结果是:

Link ......
/cygdrive/c/adtide/gnutools/bin/arm-elf-ld: warning: cannot find entry symbol _start; defaulting to 00008000
.\debug\serial.o(.text+0x7c): In function `Main':
D:/tempfiles/arm/serial1/serial.c:69: undefined reference to `__floatsidf'
.\debug\serial.o(.text+0xa4):D:/tempfiles/arm/serial1/serial.c:69: undefined reference to `__adddf3'
.\debug\serial.o(.text+0xc8):D:/tempfiles/arm/serial1/serial.c:69: undefined reference to `__divdf3'
.\debug\serial.o(.text+0xd8):D:/tempfiles/arm/serial1/serial.c:69: undefined reference to `__floatsidf'
.\debug\serial.o(.text+0x100):D:/tempfiles/arm/serial1/serial.c:69: undefined reference to `__adddf3'
.\debug\serial.o(.text+0x124):D:/tempfiles/arm/serial1/serial.c:69: undefined reference to `__divdf3'
.\debug\serial.o(.text+0x138):D:/tempfiles/arm/serial1/serial.c:69: undefined reference to `__adddf3'
.\debug\serial.o(.text+0x144):D:/tempfiles/arm/serial1/serial.c:69: undefined reference to `__fixdfsi'

serial1.elf - build uncompleted.

请问问题在哪里?,谢谢!!!!!!!!!