I have read README file

and
#config/scripts/switch-arch cross-ppc
#gmake
/usr/local/bin/xsltproc
Building OpenBIOS on x86 for ppc
Cleaning up... ok
Initializing build tree...ok.
Creating target Makefile...ok.
Creating config files...ok.
Building...error:
gmake[1]: Entering directory `/usr/home/icesky/openbios-devel'
gcc -Os -Wall -W -DFCOMPILER -DBOOTSTRAP -USWAP_ENDIANNESS -DNATIVE_BITWIDTH_EQUALS_HOST_BITWIDTH -Iinclude -Ikernel/include -Iobj-ppc/target/include -c -o obj-ppc/host/kernel/bootstrap.o kernel/bootstrap.c
In file included from include/openbios/sysinclude.h:5,
                 from kernel/bootstrap.c:9:
obj-ppc/target/include/asm/types.h:34:20: endian.h: No such file or directory
gmake[1]: *** [obj-ppc/host/kernel/bootstrap.o] Error 1
gmake[1]: Leaving directory `/usr/home/icesky/openbios-devel'

I check the types.h
/* endianess */
#ifdef HAVE_ENDIAN_H
#include <endian.h>
#else
#include <machine/endian.h>
#endif


--
Best regards,

Tongyi ,Zhao