ruy is not really used, tflite just uses the header file
Error log from CMake:
================================================================
-- Configuring done (2.1s)
CMake Error at cmake/nuttx_add_library.cmake:183 (add_library):
No SOURCES given to target: ruy
Call Stack (most recent call first):
apps/math/ruy/CMakeLists.txt:57 (nuttx_add_library)
Signed-off-by: chao an <anchao@lixiang.com>
