I guess it should be named LEGATO_FWUPDATE_LOCAL_INCLUDE_GUARD as also the last line of this file says as comment.
Otherwise it may not be possible to include both components/fwupdate/fwupdateDaemon/fwupdate_local.h and components/modemServices/modemDaemon/le_ecall_local.h in same application.
I recognized an issue with the include guard here.
https://github.com/legatoproject/legato-af/blob/44c2bda95f4e13344bf0cbaf730880694846e646/components/fwupdate/fwupdateDaemon/fwupdate_local.h#L9-L10
I guess it should be named LEGATO_FWUPDATE_LOCAL_INCLUDE_GUARD as also the last line of this file says as comment.
Otherwise it may not be possible to include both components/fwupdate/fwupdateDaemon/fwupdate_local.h and components/modemServices/modemDaemon/le_ecall_local.h in same application.
Regards Julian