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sbrk undefined symbol


Hi everybody,

I've a simple question for you, I've successfully build a m68k-psos-elf
compiler and library (binutils 2.9.1, gcc-2.95.2, and newlib 1.8.2), and
I've been able to compile assemble and link my new bootloader for our board.

Today I've added a #include <assert.h> inside on of the file and now at link
time I got these error messages:

/usr/local/m68k-psos-elf/lib/libc.a(abort.o): In function `abort':
/usr/src/build-newlib-68k/m68k-psos-elf/newlib/libc/stdlib/../../../../../ne
wlib-1.8.2/newlib/libc/s
tdlib/abort.c:62: undefined reference to `_exit'
/usr/local/m68k-psos-elf/lib/libc.a(sbrkr.o): In function `_sbrk_r':
/usr/src/build-newlib-68k/m68k-psos-elf/newlib/libc/reent/../../../../../new
lib-1.8.2/newlib/libc/re
ent/sbrkr.c:61: undefined reference to `sbrk'
/usr/local/m68k-psos-elf/lib/libc.a(signalr.o): In function `_kill_r':
/usr/src/build-newlib-68k/m68k-psos-elf/newlib/libc/reent/../../../../../new
lib-1.8.2/newlib/libc/re
ent/signalr.c:59: undefined reference to `kill'
/usr/local/m68k-psos-elf/lib/libc.a(signalr.o): In function `_getpid_r':
/usr/src/build-newlib-68k/m68k-psos-elf/newlib/libc/reent/../../../../../new
lib-1.8.2/newlib/libc/re
ent/signalr.c:94: undefined reference to `getpid'
make[1]: *** [/sts1mux/BootLoader/bin/boot] Error 1
make: *** [subdirs] Error 2

I've encountered this kind of error before (for different type of function)
and the FAQ simply told to stub out these. Should I do the same here. I'm a
bit worry to see sbrk here because as far as I know it is used for memory
allocation???

I've tried with another cross compiler (m68k-elf) and I get the exact same
result..

Any hints

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