eclipse 下的C编译问题 使用printf出现错误 SOS!!!

[SMILEID]

sbrkr.c:(.text+0x12): undefined reference to `_sbrk'
c:/program files/codesourcery/sourcery g++ lite/bin/../lib/gcc/arm-none-eabi/4.4.1/../../../../arm-none-eabi/lib/thumb2\libc.a(lib_a-writer.o): In function `_write_r':
writer.c:(.text+0x16): undefined reference to `_write'
c:/program files/codesourcery/sourcery g++ lite/bin/../lib/gcc/arm-none-eabi/4.4.1/../../../../arm-none-eabi/lib/thumb2\libc.a(lib_a-closer.o): In function `_close_r':
closer.c:(.text+0x12): undefined reference to `_close'
c:/program files/codesourcery/sourcery g++ lite/bin/../lib/gcc/arm-none-eabi/4.4.1/../../../../arm-none-eabi/lib/thumb2\libc.a(lib_a-fstatr.o): In function `_fstat_r':
fstatr.c:(.text+0x14): undefined reference to `_fstat'
c:/program files/codesourcery/sourcery g++ lite/bin/../lib/gcc/arm-none-eabi/4.4.1/../../../../arm-none-eabi/lib/thumb2\libc.a(lib_a-isattyr.o): In function `_isatty_r':
isattyr.c:(.text+0x12): undefined reference to `_isatty'
c:/program files/codesourcery/sourcery g++ lite/bin/../lib/gcc/arm-none-eabi/4.4.1/../../../../arm-none-eabi/lib/thumb2\libc.a(lib_a-lseekr.o): In function `_lseek_r':
lseekr.c:(.text+0x16): undefined reference to `_lseek'
c:/program files/codesourcery/sourcery g++ lite/bin/../lib/gcc/arm-none-eabi/4.4.1/../../../../arm-none-eabi/lib/thumb2\libc.a(lib_a-readr.o): In function `_read_r':
readr.c:(.text+0x16): undefined reference to `_read'
collect2: ld returned 1 exit status
cs-make: *** [LEDY.elf] Error 1


如果去掉printf就会正确 怎么解决？？？？

[SMILEID]

大虾们 .........

[SMILEID]

怎么还没人来 o(╯□╰)o .....大虾啊大虾 拔刀相助啊...

[TKD03072010]

在eclipse下编写c语言？

[SMILEID]

[Quote=引用 3 楼 tkd03072010 的回复:]
在eclipse下编写c语言？
[/Quote]
可以的 我在用STM32的板子 其它都可以 就是printf有问题

[felix_f]

https://sites.google.com/site/stm32discovery/open-source-development-with-the-stm32-discovery/getting-newlib-to-work-with-stm32-and-code-sourcery-lite-eabi