powerpc-elf compiler build errors

Hi!

I want to make a cross toolchain for powerpc-elf target,but encounter some errors. My host is cygwin on windows2000.

My directory hierarchy:
/src--binutils
|--gcc
|--newlib-1.9.0
|--build-binutils
|--build-gcc
|--build-newlib
|--install

My steps:
1. export TARGET=powerpc-elf
export PREFIX=/src/install
export PATH=$PREFIX/bin:$PATH
2.
cd build-binutils
$ ../binutils/binutils-2.11.2/configure --target=$TARGET --prefix=$PREFIX
$ make all install 2>&1 | tee make.log
$ cd ..
3.
cd build-gcc
../gcc/gcc-2.95.3/configure --target=$TARGET --prefix=$PREFIX \
--with-newlib --without-headers --with-gnu-as \
--with-gnu-ld --disable-shared --enable-languages=c
make all-gcc install-gcc 2>&1 | tee make.log
cd ..
4.
cd build-newlib
../newlib-1.9.0/configure --target=$TARGET --prefix=$PREFIX
make all install 2>&1 | tee make.log
cd ..
5.
cd build-gcc && rm -rf *
../gcc/gcc-2.95.3/configure --target=$TARGET --prefix=$PREFIX \
--with-gnu-as --with-gnu-ld --enable-languages=c,c++
make all install 2>&1 | tee make.log

The result:
................
/src/build-gcc/gcc/xgcc -B/src/build-gcc/gcc/ -B/src/install//powerpc-elf/bin/ -c -DHAVE_CONFIG_H -g -O2 -I. -I../../../gcc/gcc-2.95.2/libiberty/../include ../../../gcc/gcc-2.95.2/libiberty/vsprintf.c -o pic/vsprintf.o
/src/build-gcc/gcc/xgcc -B/src/build-gcc/gcc/ -B/src/install//powerpc-elf/bin/ -c -DHAVE_CONFIG_H -g -O2 -I. -I../../../gcc/gcc-2.95.2/libiberty/../include ../../../gcc/gcc-2.95.2/libiberty/vsprintf.c
../../../gcc/gcc-2.95.2/libiberty/vsprintf.c: In function `vsprintf':
../../../gcc/gcc-2.95.2/libiberty/vsprintf.c:47: structure has no member named `_flag'
../../../gcc/gcc-2.95.2/libiberty/vsprintf.c:47: `_IOWRT' undeclared (first use in this function)
../../../gcc/gcc-2.95.2/libiberty/vsprintf.c:47: (Each undeclared identifier is reported only once
../../../gcc/gcc-2.95.2/libiberty/vsprintf.c:47: for each function it appears in.)
../../../gcc/gcc-2.95.2/libiberty/vsprintf.c:47: `_IOSTRG' undeclared (first use in this function)
../../../gcc/gcc-2.95.2/libiberty/vsprintf.c:48: structure has no member named `_ptr'
../../../gcc/gcc-2.95.2/libiberty/vsprintf.c:49: structure has no member named `_cnt'
make[1]: *** [vsprintf.o] Error 1
make[1]: Leaving directory `/src/build-gcc/powerpc-elf/libiberty'
make: *** [all-target-libiberty] Error 2

I have found some clues to attack the error information at your CrossGCC Faq, which says the following: " When building for powerpc-eabi, the complete gcc build step will fail due to a reported error building libiberty. To finish building gcc, do this after the failure:
$ make CFLAGS="-O2 -myellowknife" install 2>&1 | tee make2.log
The problem here is that the powerpc-eabi crosscompiler doesn't come with a "default" build target, the way other versions of gcc do. By selecting �\myellowknife, we tell gcc to use the yellowknife target's linker scripts during building. This doesn't affect anything in the end, because the step that fails is merely testing that the compiler works�� without the �\m, it won't. "

But when I try the above method, the make says cannot find the "-myelloknife" option. I think the reason maybe it is for powerpc-eabi only.

What's wrong on earth with my steps?
Any recommendation will be much appreciated!
thanks in advance!

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