禁止“对“全部"不做任何事情" [英] Suppress "nothing to be done for 'all' "

问题描述

我正在编写一个简短的shell脚本，该脚本称为"make all".这不是很关键，但是如果是这样的话，有没有办法我可以抑制什么都做不了"的信息呢?我希望找到一个标记来抑制这种情况(不确定是否有一个标记)，但是另外一行或两行代码也可以工作.

I am writing a short shell script which calls 'make all'. It's not critical, but is there a way I can suppress the message saying 'nothing to be done for all' if that is the case? I am hoping to find a flag for make which suppresses this (not sure there is one), but an additional line or 2 of code would work too.

仅供参考，我正在使用bash.

FYI I'm using bash.

更清楚地说，我只想支持无事可做的消息.否则，我想显示输出.

to be more clear, I only want to suppess messages that therer is nothing to be done. Otherwise, I want to display the output.

推荐答案

您可以将全部"作为PHONY目标(如果尚未实现)，该目标具有实际目标，并且可以进行一些不起眼的事情:

You can make "all" a PHONY target (if it isn't already) which has the real target as a prerequisite, and does something inconspicuous:

.PHONY: all

all: realTarget
    @echo > /dev/null

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