问题
I m using buildroot to create a filesystem for a Raspberry Pi. I have uncompressed the filesystem image in the Root partition of my SD card but I can't boot the operative system. I get the following errors:
Can't open /dev/null no such file or directory
Can't open /dev/ttyS0 no such file or directory
Which line of the configuration tool should I enable or modify in order to boot the system?
EDIT
I've followed the steps provided by Thomas Petazzoni and used a preconfigured version of buildroot. Now the system works but I still don't know which option in the kernel configuration tool was causing the problem.
回答1:
You don't have devtmpfs enabled in your kernel.
Also, you should start by using the raspberrypi_defconfig in Buildroot instead of rolling your own. Do:
make distclean
make raspberrypi_defconfig
make
And then follow the instructions in board/raspberrypi/readme.txt to know how to use the resulting images.
来源：https://stackoverflow.com/questions/25858279/buildroot-system-doesnt-boot-dev-ttys0-no-such-file