cross-compile broken?

[Paolo Bonzini]

> 
> gcc -c   -g -DIN_GCC -DCROSS_COMPILE  -W -Wall -Wwrite-strings
> -Wstrict-prototypes -Wmissing-prototypes  -fno-common   -DHAVE_CONFIG_H
> -DGENERATOR_FILE    -I. -I. -I../gcc/gcc
> -I../gcc/gcc/. -I../gcc/gcc/../include -I../gcc/gcc/../libcpp/include   \
>     ../gcc/gcc/errors.c -o errors.o
> make: *** No rule to make target `../libiberty/libiberty.a', needed by
> `genmodes'.  Stop.

I cannot replicate this.  What's the exact command line for configuring 
and building?

Paolo