This adds out-of-tree usage guide of CMake for FLAT, PROTECTED and KERNEL
configs so that more kernel developers can enjoy cmake for their daily
work.
Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
"
I used
cd nuttx
cmake -B build -DBOARD_CONFIG=stm32f401rc-rs485:nsh -GNinja
to config
and when following the instruction in this official websites I found the
command to use cmake to build the target is wrong.
which is "cmake --build build -t menuconfig" also wrong the output dir
"build/nuttx".
and by the way, In my practice I find the bin file and elf file is not
in build/nuttx but in build/. So I changed these. But I'm not 100% sure
that my fix is right as I'm a beginner, but what I fix works fine in my
computer. This is my first PR to the public doc. My fix maybe totally
wrong as I am not get into the nuttx, just following the instruction and
encountered some mistakes.
thx for reviewing
"
