zephyr 的shield机制

[supperthomas]

shield 机制如何生效的

[supperthomas]

# This sample is specific to x_nucleo_iks4a1 shield. Enforce -DSHIELD option
set(SHIELD x_nucleo_iks4a1_shub1)

zephyr\samples\shields\x_nucleo_iks4a1\sensorhub1\CMakeLists.txt