VERSION_SED_SCRIPT -- what it does, how to use

Can anyone more versed in Makefile-do explain/elaborate on what does the VERSION_SED_SCRIPT do: ?

I've seen examples of the use, I still don't understand what it does. Can I use it to "stamp" some files with the version number from the Makefile?

It replaces identifiers with full strings.
For example %V gets replaced with the version string e.g. 21.02.0

Base Files is a good practical example.
See the /etc/openwrt_release file here: Git - openwrt/openwrt.git/blob - package/base-files/files/etc/openwrt_release
And the Makefile at line 151 calls VERSION_SED_SCRIPT on the /etc/openwrt_release (and others) file and does the substitution of several variables. Git - openwrt/openwrt.git/blob - package/base-files/Makefile

I don't think you can use VERSION_SED_SCRIPT for what you want to do (it has a very defined purpose). On line 159 of the same makefile, you can see a generic SED call. Git - openwrt/openwrt.git/blob - package/base-files/Makefile
You might use a strategy like that in your files?

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