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我按照光盘里的 QT2410 linux安装手册一文 使用指南八：如何编译内核时出现如下错误：

编译内核出现如下错误：
[root@localhost test]# cd kernel
[root@localhost kernel]# make menuconfig
rm -f include/asm-arm/arch include/asm-arm/proc
(cd include/asm-arm; ln -sf arch- arch; ln -sf proc- proc)
rm -f include/asm
( cd include ; ln -sf asm-arm asm)
make -C scripts/lxdialog all
make[1]: Entering directory `/home/test/kernel/scripts/lxdialog'
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -DLOCALE -I/usr/include/ncurses -DCURSES_LOC="<ncurses.h>" -c -o checklist.o checklist.c
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -DLOCALE -I/usr/include/ncurses -DCURSES_LOC="<ncurses.h>" -c -o menubox.o menubox.c
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -DLOCALE -I/usr/include/ncurses -DCURSES_LOC="<ncurses.h>" -c -o textbox.o textbox.c
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -DLOCALE -I/usr/include/ncurses -DCURSES_LOC="<ncurses.h>" -c -o yesno.o yesno.c
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -DLOCALE -I/usr/include/ncurses -DCURSES_LOC="<ncurses.h>" -c -o inputbox.o inputbox.c
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -DLOCALE -I/usr/include/ncurses -DCURSES_LOC="<ncurses.h>" -c -o util.o util.c
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -DLOCALE -I/usr/include/ncurses -DCURSES_LOC="<ncurses.h>" -c -o lxdialog.o lxdialog.c
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -DLOCALE -I/usr/include/ncurses -DCURSES_LOC="<ncurses.h>" -c -o msgbox.o msgbox.c
gcc -o lxdialog checklist.o menubox.o textbox.o yesno.o inputbox.o util.o lxdialog.o msgbox.o -lncurses
make[1]: Leaving directory `/home/test/kernel/scripts/lxdialog'
/bin/sh scripts/Menuconfig arch/arm/config.in
Using defaults found in arch/arm/defconfig
Preparing scripts: functions, parsing.........................................................................done.

Saving your kernel configuration...

*** End of Linux kernel configuration.
*** Check the top-level Makefile for additional configuration.
*** Next, you must run 'make dep'.

[root@localhost kernel]# make dep
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -o scripts/mkdep scripts/mkdep.c
rm -f include/asm-arm/arch include/asm-arm/proc
(cd include/asm-arm; ln -sf arch-s3c2410 arch; ln -sf proc-armv proc)
make[1]: Entering directory `/home/test/kernel/arch/arm/tools'
/home/test/kernel/scripts/mkdep -D__KERNEL__ -I/home/test/kernel/include -Wall -Wstrict-prototypes -Wno-trigraphs -Os -mapcs -fno-strict-aliasing -fno-common -fno-common -pipe -mapcs-32 -march=armv4 -mtune=arm9tdmi -mshort-load-bytes -msoft-float -- getconstants.c |\
sed s,getconstants.o,constants.h, > .depend
make all
make[2]: Entering directory `/home/test/kernel/arch/arm/tools'
awk -f gen-mach-types mach-types > /home/test/kernel/include/asm-arm/mach-types.h
/opt/host/armv4l/bin/armv4l-unknown-linux-gcc -D__KERNEL__ -I/home/test/kernel/include -Wall -Wstrict-prototypes -Wno-trigraphs -Os -mapcs -fno-strict-aliasing
-fno-common -fno-common -pipe -mapcs-32 -march=armv4 -mtune=arm9tdmi -mshort-load-bytes -msoft-float -S -o constants.h.tmp.1 getconstants.c
make[2]: /opt/host/armv4l/bin/armv4l-unknown-linux-gcc: Command not found
make[2]: *** [constants.h] Error 127
make[2]: Leaving directory `/home/test/kernel/arch/arm/tools'
make[1]: *** [dep] Error 2
make[1]: Leaving directory `/home/test/kernel/arch/arm/tools'
make: *** [archdep] Error 2
[root@localhost kernel]#

配置时选的是 load an alternate configuration file 输入是arch/arm/def-configs/smdk2410

请问是什么原因？