Cross-compiler building

[Senti]

I've tried to compile gcc-2.95.2 for another target 
named "quartz-motorola-svr4".
The name doesn't matter.
My problem is the error that make gives 
me :
 
   .....
  rm -rf include; mkdir 
include
 TARGET_MACHINE=quartz-motorola-unknown-sysv4; srcdir=`cd .; pwd` ; 
\
 INSTALL_ASSERT_H=install-assert-h; SHELL=/bin/sh ;\
 export TARGET_MACHINE srcdir 
INSTALL_ASSERT_H SHELL ; \
/bin/sh ./fixinc.sh `pwd` 
/include  
/home/stud/senti/ddd/quartz-motorola-svr4/sys-include
Building fixed headers in 
/home/stud/senti/1/gcc/include
./fixing.sh: 
/home/stud/senti/ddd/quartz-motorola-svr4/sys-include: does not 
exists
make[1]: *** [stmp-fixinc] Error 
1
make[1]: Leaving directory 
...
......
 
Make seems to want some include directory. I've 
looked in make and there is a define named 
SYSTEM_HEADER_DIR which usually takes the value 
"/usr/bin" and which now takes another value
like 
"/home/stud/senti/ddd/quartz-motorola-svr4/sys-include".
 
 Do i need some other files besides the 
machine description and config files for building a cross compiler 
?
 If somebody can tell me something more about 
it i would apreciate it a lot.
 
Thanks,  
Adrian.