selectively increase optimization -Os -> -O2

- targetted at modules/libraries that benefit without drastically
increasing flash usage
 - ignored on boards with CONSTRAINED_FLASH set

src/modules/mc_att_control/AttitudeControl/CMakeLists.txt

@@ -33,10 +33,9 @@
 
 px4_add_library(AttitudeControl
 	AttitudeControl.cpp
+	AttitudeControl.hpp
 )
-target_include_directories(AttitudeControl
-	PUBLIC
-	${CMAKE_CURRENT_SOURCE_DIR}
-)
+target_compile_options(AttitudeControl PRIVATE ${MAX_CUSTOM_OPT_LEVEL})
+target_include_directories(AttitudeControl PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
 
 px4_add_unit_gtest(SRC AttitudeControlTest.cpp LINKLIBS AttitudeControl)

src/modules/mc_att_control/CMakeLists.txt

@@ -37,10 +37,12 @@ px4_add_module(
 	MODULE modules__mc_att_control
 	MAIN mc_att_control
 	COMPILE_FLAGS
+		${MAX_CUSTOM_OPT_LEVEL}
 	SRCS
 		mc_att_control_main.cpp
+		mc_att_control.hpp
 	DEPENDS
-		mathlib
 		AttitudeControl
+		mathlib
 		px4_work_queue
 	)