----------------------------------------------------------------------------------------------------
main.o: In function `Soft_Reset':
main.o(.text+0x8): undefined reference to `puts'
main.o: In function `HelpList':
main.o(.text+0x48): undefined reference to `puts'
main.o: In function `HelpItem':
main.o(.text+0x5c): undefined reference to `puts'
main.o: In function `main':
main.o(.text+0x104): undefined reference to `puts'
main.o(.text+0x10c): undefined reference to `puts'
main.o(.text+0x114): more undefined references to `puts' follow
main.o: In function `main':
main.o(.text+0x248): undefined reference to `putchar'
main.o(.text+0x2b0): undefined reference to `putchar'
intel_flash.o: In function `iflash_erase':
intel_flash.o(.text+0x2ec): undefined reference to `puts'
intel_flash.o(.text+0x30c): undefined reference to `puts'
intel_flash.o: In function `iflash_write':
intel_flash.o(.text+0x430): undefined reference to `puts'
cs8900.o: In function `CS8900_Transmit':
cs8900.o(.text+0xec): undefined reference to `puts'
cs8900.o: In function `CS8900_Init':
cs8900.o(.text+0x1b0): undefined reference to `puts'
cs8900.o(.text+0x210): more undefined references to `puts' follow
config.o: In function `GetMacAddress':
config.o(.text+0x1b0): undefined reference to `putchar'
config.o: In function `GetIPAddress':
config.o(.text+0x254): undefined reference to `putchar'
config.o: In function `GetFileName':
config.o(.text+0x330): undefined reference to `putchar'
config.o: In function `GetAddress':
config.o(.text+0x388): undefined reference to `putchar'
config.o: In function `GetMenuKey':
config.o(.text+0x400): undefined reference to `putchar'
config.o(.text+0x468): more undefined references to `putchar' follow
config.o: In function `ModifyCfg':
config.o(.text+0x50c): undefined reference to `puts'
config.o(.text+0x668): undefined reference to `putchar'
config.o(.text+0x7e4): undefined reference to `putchar'
config.o(.text+0x8f4): undefined reference to `putchar'
ram_cmd.o: In function `MemoryHexDump':
ram_cmd.o(.text+0x5c): undefined reference to `putchar'
ram_cmd.o(.text+0x84): undefined reference to `putchar'
ram_cmd.o(.text+0x9c): more undefined references to `putchar' follow
ram_cmd.o: In function `RamDump':
ram_cmd.o(.text+0x104): undefined reference to `puts'
ram_cmd.o: In function `RamWriteChar':
ram_cmd.o(.text+0x1b4): undefined reference to `puts'
ram_cmd.o: In function `RamWriteWord':
ram_cmd.o(.text+0x228): undefined reference to `puts'
ram_cmd.o: In function `RamWriteLong':
ram_cmd.o(.text+0x29c): undefined reference to `puts'
zmodem_cmd.o: In function `ZModem_Memory':
zmodem_cmd.o(.text+0x1c): undefined reference to `puts'
zmodem_cmd.o(.text+0x90): more undefined references to `puts' follow
collect2: ld returned 1 exit status
make[1]: *** [main-elf32] 오류 1
make: *** [all] 오류 2
----------------------------------------------------------------------------------------------------

위와 같은 에러가 나는데요. 왜그런가요..... ?????
tmk가 되다가 안되다가 해서 수정했는데. 컴파일이 안되네요..