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arm-none-linux-gnueabi-gcc:Command not found

Hi~,I refer to this document,http://processors.wiki.ti.com/index.php/GSG:_Building_Software_Components_for_OMAP-L1#Rebuilding_U-Boot

when I execute following command:

host$ make all CROSS_COMPILE=arm-none-linux-gnueabi-
the bash prompt that some errors happened.

I had installed the sourcery g++ tools. what's problems ?      

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make: arm-none-linux-gnueabi-gcc: Command not found
/bin/sh: arm-none-linux-gnueabi-gcc: command not found
dirname: missing operand
Try `dirname --help' for more information.
/bin/sh: arm-none-linux-gnueabi-gcc: command not found
dirname: missing operand
Try `dirname --help' for more information.
for dir in tools examples/standalone examples/api ; do make -C $dir _depend ; done
/bin/sh: arm-none-linux-gnueabi-gcc: command not found
dirname: missing operand
Try `dirname --help' for more information.
make[1]: arm-none-linux-gnueabi-gcc: Command not found
make[1]: Entering directory `/home/am18/ti-sdk-am180x-evm-4.0.1.0/psp/u-boot-2009.11-psp03.20.00.13/tools'
make[1]: Nothing to be done for `_depend'.
make[1]: Leaving directory `/home/am18/ti-sdk-am180x-evm-4.0.1.0/psp/u-boot-2009.11-psp03.20.00.13/tools'
make[1]: arm-none-linux-gnueabi-gcc: Command not found
make[1]: Entering directory `/home/am18/ti-sdk-am180x-evm-4.0.1.0/psp/u-boot-2009.11-psp03.20.00.13/examples/standalone'
/bin/sh: arm-none-linux-gnueabi-gcc: command not found
dirname: missing operand
Try `dirname --help' for more information.
make[1]: Nothing to be done for `_depend'.
make[1]: Leaving directory `/home/am18/ti-sdk-am180x-evm-4.0.1.0/psp/u-boot-2009.11-psp03.20.00.13/examples/standalone'
make[1]: arm-none-linux-gnueabi-gcc: Command not found
make[1]: Entering directory `/home/am18/ti-sdk-am180x-evm-4.0.1.0/psp/u-boot-2009.11-psp03.20.00.13/examples/api'
/bin/sh: arm-none-linux-gnueabi-gcc: command not found
dirname: missing operand
Try `dirname --help' for more information.
make[1]: Nothing to be done for `_depend'.
make[1]: Leaving directory `/home/am18/ti-sdk-am180x-evm-4.0.1.0/psp/u-boot-2009.11-psp03.20.00.13/examples/api'
make -C tools all
/bin/sh: arm-none-linux-gnueabi-gcc: command not found
dirname: missing operand
Try `dirname --help' for more information.
make[1]: arm-none-linux-gnueabi-gcc: Command not found
make[1]: Entering directory `/home/am18/ti-sdk-am180x-evm-4.0.1.0/psp/u-boot-2009.11-psp03.20.00.13/tools'
make[1]: Leaving directory `/home/am18/ti-sdk-am180x-evm-4.0.1.0/psp/u-boot-2009.11-psp03.20.00.13/tools'
make -C examples/standalone all
/bin/sh: arm-none-linux-gnueabi-gcc: command not found
dirname: missing operand
Try `dirname --help' for more information.
make[1]: arm-none-linux-gnueabi-gcc: Command not found
make[1]: Entering directory `/home/am18/ti-sdk-am180x-evm-4.0.1.0/psp/u-boot-2009.11-psp03.20.00.13/examples/standalone'
/bin/sh: arm-none-linux-gnueabi-gcc: command not found
dirname: missing operand
Try `dirname --help' for more information.
arm-none-linux-gnueabi-gcc -g -Os -fno-common -ffixed-r8 -msoft-float -fno-common -ffixed-r8 -msoft-float -D__KERNEL__ -DTEXT_BASE=0xC1080000 -I/home/am18/ti-sdk-am180x-evm-4.0.1.0/psp/u-boot-2009.11-psp03.20.00.13/include -fno-builtin -ffreestanding -nostdinc -isystem -pipe -DCONFIG_ARM -D__ARM__ -march=armv5te -march=armv5te -Wall -Wstrict-prototypes -o hello_world.o hello_world.c -c
make[1]: arm-none-linux-gnueabi-gcc: Command not found
make[1]: *** [hello_world.o] Error 127
make[1]: Leaving directory `/home/am18/ti-sdk-am180x-evm-4.0.1.0/psp/u-boot-2009.11-psp03.20.00.13/examples/standalone'
make: *** [examples/standalone] Error 2

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