UAVCAN_PACK_STRUCTS is always defined

libuavcan/dsdl_compiler/data_type_template.tmpl

@@ -31,6 +31,10 @@ ${line}
 % endfor
 ******************************************************************************/
 
+#ifndef UAVCAN_PACK_STRUCTS
+# error UAVCAN_PACK_STRUCTS
+#endif
+
 % for nsc in t.cpp_namespace_components:
 namespace ${nsc}
 {

libuavcan/include/uavcan/impl_constants.hpp

@@ -44,6 +44,9 @@
  * Struct layout control.
  * Define UAVCAN_PACK_STRUCTS = 1 to reduce memory usage.
  */
+#ifndef UAVCAN_PACK_STRUCTS
+# define UAVCAN_PACK_STRUCTS    0
+#endif
 #ifndef UAVCAN_PACKED_BEGIN
 # define UAVCAN_PACKED_BEGIN _Pragma("pack(push, 1)")
 #endif