Makefile로 빌드할 때마다 version 명이 포함되도록 헤더 파일 생성하기

version.h: ./MODEL_NAME
    rm -f $@
    @echo "creating $@ ..."; \
    version=`cat ./MODEL_NAME`; \
    today=`date +"%Y.%m.%d" `; \
    time=`date +"%H:%M:%S" `; \
    echo "#ifndef VERSION_H_INCLUDED" > $@; \
    echo "#define VERSION_H_INCLUDED"  >> $@; \
    echo "#define MY_VERSION \"$$version ($$today, $$time)\"" >> $@; \
    echo "#endif /* VERSION_H_INCLUDED */" >> $@