Now,I have download "vexpress-linaro-13.09-release",next I want to build it.But I donot want to rebuild "native-toolchain",can I use the toolchain from "http://snapshots.linaro.org/android/~linaro-android/toolchain-4.7-2013.09" instead of it ? The followings are my operations:
1. download the toolchain from "http://snapshots.linaro.org/android/~linaro-android/toolchain-4.7-2013.09"
2. mv the toolchain to "<android code directory>/prebuilts/gcc/linux-x86/arm/" , then "tar xvf android-toolchain-eabi-4.7-2013.09-x86.tar.bz2"
3. gedit <android code directory>/native-toolchain/Android.mk
      comment out the two lines:
      native-toolchain: $(GCC_FILE_NAME)
      $(GCC_FILE_NAME): $(TARGET_CRTBEGIN_DYNAMIC_O) $(TARGET_CRTEND_O) / $(TARGET_OUT_SHARED_LIBRARIES)/libm.so $(TARGET_OUT_SHARED_LIBRARIES)/libc.so / $(TARGET_OUT_SHARED_LIBRARIES)/libdl.so $(TARGET_OUT_SHARED_LIBRARIES)/libstlport.so
4. gedit "linaro_android_build_cmds.sh"
  modify line:export TARGET_TOOLS_PREFIX=prebuilts/gcc/linux-x86...  to
                    export TARGET_TOOLS_PREFIX=prebuilts/gcc/linux-x86/arm/android-toolchain-eabi/bin/arm-linux-androideabi-
5  . build/envsetup.sh
    make  boottarball systemtarball userdatatarball
so is it right to build the code with a prebuild toolchain ?  Looking forward to your answer.