about cross-compile

[Squall Tang]

hi everybody:
 	when I am trying to compile a compiler cross m68k with gcc-2.95.2,
i get errors in "libgcc2.c" and "frame.c"; here is the commands i executed:
	#./confgiure --target=m68k-coff  --prefix=/cross
	#make LANGUAGES="C C++"

it says that no "stdlib.h" "unistd.h" can't be found!
and there are no such problems with gcc-2.8.1; so what can i do?
thx

Plus:
	I had built binutils-2.9  built already;
	#./configure --target=m68k-coff --prefix=/cross

		Tang YU