scons找不到arm-none-eabi-gcc，但环境变量已经包含arm-none-eabi-gcc的路径

[fanzhiri]

(base) slakofan@slako rtthread-apps % scons --app=hello
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
CC hello/main.o
sh: arm-none-eabi-gcc: command not found
scons: *** [hello/main.o] Error 127
scons: building terminated because of errors.
(base) slakofan@slako rtthread-apps % arm-none-eabi-gcc
arm-none-eabi-gcc arm-none-eabi-gcc-ar arm-none-eabi-gcc-ranlib
arm-none-eabi-gcc-10.3.1 arm-none-eabi-gcc-nm