making sscanf() & sprintf() work

[Peer Moeller Ilsoe <ilsoe@kom.auc.dk>]

Hi,

I want thank everyone who responded to my double <-> string conversion
problem. It seems that sscanf() and sprintf() do the job just fine -at
least on our unix machines. Now when I try to cross-compile with the
newlib 1.8 libraries (libm, libc, and libgcc) the linker
goes:

/usr/local/m68k-coff/lib/m68332/msoft-float/libc.a(makebuf.o):
In function `__smakebuf':
makebuf.c:93: undefined reference to `isatty'
/usr/local/m68k-coff/lib/m68332/msoft-float/libc.a(sbrkr.o): In function
`_sbrk_r':
sbrkr.c:61: undefined reference to `sbrk'
/usr/local/m68k-coff/lib/m68332/msoft-float/libc.a(fstatr.o): In function
`_fstat_r':
fstatr.c:61: undefined reference to `fstat'
/usr/local/m68k-coff/lib/m68332/msoft-float/libc.a(readr.o): In function
`_read_r':
readr.c:58: undefined reference to `read'
/usr/local/m68k-coff/lib/m68332/msoft-float/libc.a(lseekr.o): In function
`_lseek_r':
lseekr.c:58: undefined reference to `lseek'
/usr/local/m68k-coff/lib/m68332/msoft-float/libc.a(writer.o): In function
`_write_r':
writer.c:58: undefined reference to `write'
/usr/local/m68k-coff/lib/m68332/msoft-float/libc.a(closer.o): In function
`_close_r':
closer.c:53: undefined reference to `close'

Can anybody tell me weather I have to write these functions myself or are
they already implemented somewhere?
Can they be stubbed out if I'm not going to use any kind of std I/O?
What should the functions do if they can't be stubbed out?
I just need a minimal system, which will make the conversion work.

The hardware is a self-made mc68331 based board with bdm interface, ram,
two lcd's and a keyboard but no serial communication or debug rom.

Any help is greatly appreciated

____________
Peer Ilsøe