ESP8266 RTOS SDK 使用make命令编译出现Permission denied问题的解决方法

环境：

ESP8266 RTOS SDK

命令

> make -j4 flash && make monitor

错误信息：

Toolchain path: /Users/esp8266/toolchain/xtensa-lx106-elf/bin/xtensa-lx106-elf-gcc
Toolchain version: crosstool-ng-1.22.0-100-ge567ec7
Compiler version: 5.2.0
Python requirements from /Users/esp8266/ESP8266_RTOS_SDK/requirements.txt are satisfied.
GENCONFIG
touch: setting times of '/Users/esp8266/projects/gpio/build/include/config/auto.conf': Permission denied
touch: setting times of '/Users/esp8266/projects/gpio/build/include/sdkconfig.h': Permission denied
make: *** No rule to make target `/Users/esp8266/projects/gpio/build/include/config/auto.conf', needed by `/Users/esp8266/projects/gpio/build/bootloader/bootloader.bin'.  Stop.

原因：我是在命令行下切换不同用户来切换官方开发环境，所以用户切换造成权限问题。

解决方法：

1. 修改权限：

sudo chown -R $(whoami) /Users/esp8266/projects/gpio/build

然后再试 make -j4 && make monitor

2. 清理并重新编译

如果权限修复后仍然报错，尝试清理并重新编译：

make clean
make -j4 && make monitor