如何在makefile中抑制回声？

install: 
        echo /usr/bin/shelldecrypt must be writable
        cp shelldecrypt /usr/bin

当我运行目标时,它会显示正在执行的命令

提示> make install

输出是

    echo /usr/bin/shelldecrypt must be writable 
    /usr/bin/shelldecrypt must be writable
    cp shelldecrypt /usr/bin

按我的意思输出它

    /usr/bin/shelldecrypt must be writable
    cp shelldecrypt /usr/bin

install: 
        @echo /usr/bin/shelldecrypt must be writable
        cp shelldecrypt /usr/bin