Like was done for AP_HAL_Linux in 2ac96b9 ("AP_HAL_Linux: remove prefix
from AP_HAL_Linux classes"), remove the "Empty" prefix from class names
since we are already inside the Empty namespace.
These are "left-overs" from how things worked before commit
"AP_HAL: make code not depend on concrete HAL
implementations". The real declaration now lives inside get_HAL() function.
Use the opportunitiy to change the files to use "#pragma once".
This commit changes the way libraries headers are included in source files:
- If the header is in the same directory the source belongs to, so the
notation '#include ""' is used with the path relative to the directory
containing the source.
- If the header is outside the directory containing the source, then we use
the notation '#include <>' with the path relative to libraries folder.
Some of the advantages of such approach:
- Only one search path for libraries headers.
- OSs like Windows may have a better lookup time.
Michael du Breuil
Lucas De Marchi
Caio Marcelo de Oliveira Filho
Gustavo Jose de Sousa
Pat Hickey