howto disable fixincludes in gcc-4.1.1?

["f.l." <texlexsex@xxxxxxxxx>]

hi,
how to safely disable fixincludes in gcc-4.1.1?

on my system, i modify the file gcc/configure changed the line
  STMP_FIXINC=stmp-fixinc
to
  STMP_FIXINC=

but then the building process fail with error message like this:

In file included from ../../gcc-4.1.1/gcc/tsystem.h:108,
                from ../../gcc-4.1.1/gcc/crtstuff.c:68:
./include/limits.h:11:23: error: syslimits.h: No such file or directory