cmake_minimum_required(VERSION 3.18)
FILE(SIZE ${LANG_FILE} FILE_SIZE)
get_filename_component(FILE_BASE ${LANG_FILE} NAME)
MATH(EXPR PADDED_SIZE "((${FILE_SIZE}+256-1) / 256 * 256 )")
MATH(EXPR FREE_SPACE "(${LANG_MAX_SIZE}-${FILE_SIZE})") 
if(${PADDED_SIZE} GREATER ${LANG_MAX_SIZE})
    message(FATAL_ERROR "Language file ${FILE_BASE} (${PADDED_SIZE}b) exceeds maximum allowed size of ${LANG_MAX_SIZE} bytes - Aborting!")
else()
    MATH(EXPR SIZE_PCT "( ${PADDED_SIZE} * 100) / ${LANG_MAX_SIZE} " )
    message(STATUS "Language file ${FILE_BASE} is ${PADDED_SIZE} (${FILE_SIZE}) bytes, ${SIZE_PCT}% of allowed space. Free bytes ${FREE_SPACE} - OK")
endif()