busybox-1.17.3/scripts/gcc-version.sh: line 11: arm-linux-gcc: command not found

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1.Makefile里面的1.ARCH ?=   CROOS_COMPILE?=
2.权限
3.make menuconfig 完后yes,保存

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sem_num.c:(.text+0x1d1): undefined reference to `sem_post'
未定义

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