How do you change makefile variables file extension?

Question

For example, I have a variable that holds a list of dependencies

BOARDS:=lance.mcm light.mcm sac.mcm

I need another variable named NET such that

NET:=lance.net light.net sac.net

It should be set such that when I change the BOARDS variable, NET should change as well. For example, if I add a new zor.mcm into the BOARDS variable, it should automatically add zor.net into the NET variable.

Superset: multiple extensions: http://stackoverflow.com/questions/12069457/how-to-change-the-extension-of-each-file-in-a-list-with-multiple-extensions-in-g — Ciro Santilli OurBigBook.com, Jul 04 '15 at 10:27

score 27 · Accepted Answer · answered Aug 09 '12 at 17:41

27

The best solution I have found is to use this syntax:

NET:=$(BOARDS:.mcm=.net)

This will look at BOARDS and change the .mcm into .net

answered Aug 09 '12 at 17:41

wonton

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A little more explanation at [How to change the extension of each file in a list with multiple extensions in GNU make?](http://stackoverflow.com/a/12071918/1730674) – askewchan Sep 26 '15 at 21:57

score 13 · Answer 2 · answered Aug 09 '12 at 17:49

13

As an alternative:

BOARDS:=lance.mcm light.mcm sac.mcm
NET:= $(addsuffix .net, $(basename $(BOARDS)))

This will preserve contents inside the file pathnames should they match pattern

answered Aug 09 '12 at 17:49

Roman Saveljev

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This is why I posted the question in the first place. This is perfect, thanks! – wonton Aug 09 '12 at 17:54

How do you change makefile variables file extension?

2 Answers2