Re: [arm-gnu] 2007q3 link error: undefined reference to '_sbrk' etc.

[Nathan Sidwell <nathan@xxxxxxxxxxxxxxxx>]

Zhonghua wrote:
> Hi,
>     When using 2007q3 on linux, some error message display:
>  
> 
> arm-2007q3/arm-none-eabi/lib/libc.a(lib_a-sbrkr.o): In function `_sbrk_r':
> sbrkr.c:(.text+0x18): undefined reference to `_sbrk'
> arm-2007q3/arm-none-eabi/lib/libc.a(lib_a-sysgetpid.o): In function `getpid':
> sysgetpid.c:(.text+0x4): undefined reference to `_getpid'
> arm-2007q3/arm-none-eabi/lib/libc.a(lib_a-times.o): In function `_times_r':
> times.c:(.text+0x8): undefined reference to `_times'
> arm-2007q3/arm-none-eabi/lib/libc.a(lib_a-writer.o): In function `_write_r':
> writer.c:(.text+0x20): undefined reference to `_write'

> What I should do? Could you tell me.

you need to provide implementations of those functions that are suitable for
your board.   The linker scripts provided with the toolchain show how that may
be achieved.

nathan

-- 
Nathan Sidwell    ::   http://www.codesourcery.com   ::         CodeSourcery