[U-Boot] net/eth.c drivers/net/rtl8019.c eth_xxx function name dunplication

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Hello,everybody,in RedHat 9.0,i compiled u-boot v2010.12-rc3 with 
arm-linux-tools-20070808
On link stage,print some errors:

... ... ... ... -lgcc -Map u-boot.map -o u-boot
net/libnet.o: In function `eth_halt':
/home/code/uboot_v2010.12-rc3/net/eth.c:375: multiple definition of 
`eth_halt'
drivers/net/libnet.o:/home/code/uboot_v2010.12-rc3/drivers/net/rtl8019.c:44: 
first defined here
/usr/local/bin/arm-linux-ld.real: Warning: size of symbol `eth_halt' changed 
from 16 in drivers/net/libnet.o to 52 in net/libnet.o
net/libnet.o: In function `eth_rx':
/home/code/uboot_v2010.12-rc3/net/eth.c:393: multiple definition of `eth_rx'
drivers/net/libnet.o:/home/code/uboot_v2010.12-rc3/drivers/net/rtl8019.c:44: 
first defined here
/usr/local/bin/arm-linux-ld.real: Warning: size of symbol `eth_rx' changed 
from 132 in drivers/net/libnet.o to 48 in net/libnet.o
net/libnet.o: In function `eth_init':
/home/code/uboot_v2010.12-rc3/net/eth.c:335: multiple definition of 
`eth_init'
drivers/net/libnet.o:/home/code/uboot_v2010.12-rc3/drivers/net/rtl8019.c:93: 
first defined here
/usr/local/bin/arm-linux-ld.real: Warning: size of symbol `eth_init' changed 
from 236 in drivers/net/libnet.o to 208 in net/libnet.o
net/libnet.o: In function `eth_send':
/home/code/uboot_v2010.12-rc3/net/eth.c:385: multiple definition of 
`eth_send'
drivers/net/libnet.o:/home/code/uboot_v2010.12-rc3/drivers/net/rtl8019.c:235: 
first defined here
/usr/local/bin/arm-linux-ld.real: Warning: size of symbol `eth_send' changed 
from 192 in drivers/net/libnet.o to 56 in net/libnet.o
/usr/local/bin/arm-linux-ld.real: u-boot: warning: allocated section `.bss' 
not in segment
common/libcommon.o:(.data+0x764): undefined reference to `environment'
make: *** [u-boot] Error 139

These words show me that net/eth.c has "eth_send" and drivers/net/rtl8019.c 
also has "eth_send" function as the same name.
My board use RTL8019AS ethernet controller,s3c44b0 CPU.
i couldn`t figure out what is wrong with the code and how to fix it,Thanks a 
lot for any suggestion
MrGates