rockchip rk356x 编译时老出现 .BoardConfig.mk: No such file or directory

有一段时间没有编译debian了，今天编译的时候发现

/build.sh device/rockchip/rk356x/BoardConfig-rk3568.mk
./build.sh: line 97: /home/malei/work/rk/device/rockchip/.BoardConfig.mk: No such file or directory

或者运行其他命令：

./build.sh kernel 
./build.sh: line 97: /home/malei/work/rk/device/rockchip/.BoardConfig.mk: No such file or directory

就是不管运行什么都出错，都是报.BoardConfig.mk: No such file or directory。

打开目录查看：

rk/device/rockchip# ls -a
.   .BoardConfig.mk  .target_product  oem   px3se   rk1808  rk3128h  rk3229  rk3308  rk3328  rk3399     rk356x  rockimg  rv1126_rv1109
..  .gitignore       common           px30  rk1806  rk3036  rk312x   rk3288  rk3326  rk3358  rk3399pro  rk3588  rv1108   userdata

里面有.BoardConfig.mk但是是空的，再编译还是出错。索性删除.BoardConfig.mk，再编译就正常了。