I downloaded s32ds and I'm trying to use the flexio_spi_s32k148 example and it won't compile because many of the include files can't be found.
I created the same project from example using SDK RTM 3.0.0.
First of all, it is necessary to Generate Processor Expert code. Please see the figure below especially the icon in the red square:
Second, compile the project using Build icon. Now, it should work correct.
If you have not installed latest update for S32DS, I recommend you to do this and use the latest SDK (RTM 3.0.0). Please see the link below: