nios2-linux-gnu-gcc: /include: No such file or directory

Hi everyone,

I have convert the myqsys.sopcinfo to myqsys.dts,then fabricate my nios2 custom board in the uClinux-dist like this with the trunk branch!

http://www.alterawiki.com/wiki/devicetree

http://www.alterawiki.com/wiki/creating_a_nios_ii_design_with_an_mmu

# cd /home/nios2-linux/uClinux-dist
# git branch -l 
  test-nios2
* trunk
# 

cd uClinux-dist
make menuconfig #  select Altera,my_nios2. kernel config your FPGA.
* NiosII board configuration
*
board configuration
> 1. 3C120 dev board (3C120)
 2. Nios Embedded Evaluation Kit (NEEK)
 3. my nios2 custom board (MY_NIOS2) (NEW)
choice: 3

when I print the make command,the errors show:

# make
make -f tools/autotools.mk autotools-cache
make: Entering directory `/home/nios2-linux/uClinux-dist'
make: Nothing to be done for `autotools-cache'.
make: Leaving directory `/home/nios2-linux/uClinux-dist'
chmod +x tools/romfs-inst.sh tools/modules-alias.sh tools/build-udev-perms.sh
. linux-2.6.x/.config; if ; then 
                mkdir -p `dirname $CONFIG_INITRAMFS_SOURCE`; 
                touch $CONFIG_INITRAMFS_SOURCE || exit 1; 
        fi
rm -f linux-2.6.x/usr/initramfs_data.cpio
make ARCH=nios2   CROSS_COMPILE=nios2-linux-gnu- O=/home/nios2-linux/uClinux-dist/linux-2.6.x -j8 -C ../linux-2.6  || exit 1
make: Entering directory `/home/nios2-linux/linux-2.6'
  GEN     /home/nios2-linux/uClinux-dist/linux-2.6.x/Makefile
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
  Using /home/nios2-linux/linux-2.6 as source for kernel
  CC      scripts/mod/empty.o
nios2-linux-gnu-gcc: /include: No such file or directory
nios2-linux-gnu-gcc: /include: No such file or directory
make: ***  Error 1
make: ***  Error 2
make: ***  Error 2
make: ***  Error 2
make: Leaving directory `/home/nios2-linux/linux-2.6'
make: ***  Error 1

I have set the PATH in the .bash_profile

#  .bash_profile
#  Get the aliases and functions
if ; then
	. ~/.bashrc
fi
#  User specific environment and startup programs
PATH=$PATH:$HOME/bin:/nios2-linux/toolchain-mmu/x86-linux2/bin
export PATH
unset USERNAME

I have read this thread in the http://www.alteraforum.com/forum/showthread.php?t=29720

but dont understand what is meaning of the ' you should not need CROSS_COMPILE or CONFIGURE_HOST'

Kind Regards

Fdsa