Build system:Board level control of no-unaligned-access

platforms/nuttx/NuttX/Make.defs.in

@@ -116,6 +116,11 @@ FLAGS = $(MAXOPTIMIZATION) -g2 \
 
 FLAGS += $(EXTRAFLAGS)
 
+# force alignment
+ifeq ($(CONFIG_BOARD_FORCE_ALIGNMENT),y)
+	FLAGS += -mno-unaligned-access
+endif
+
 # enable precise stack overflow tracking
 ifeq ($(CONFIG_ARMV7M_STACKCHECK),y)
 	FLAGS += -finstrument-functions -ffixed-r10

platforms/nuttx/cmake/px4_impl_os.cmake

@@ -86,6 +86,13 @@ function(px4_os_add_flags)
 		)
 	endif()
 
+	if("${CONFIG_BOARD_FORCE_ALIGNMENT}" STREQUAL "y")
+		message(STATUS "Board forcing alignment")
+		add_compile_options(
+			-mno-unaligned-access
+		)
+	endif()
+
 endfunction()
 
 #=============================================================================