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I want to write something along these lines:
$(foreach (var1, var2), ($(LIST1), $(LIST2)), cp $(var1) $(var2);)
How do I go about doing this in a GNU makefile?
Beta’s suggestion to use join is on the right track, but the problem is that it’s not so easy to use it in a way that constructs a command line containing whitespace, such as the one you originally wanted:
because join joins words together: it was originally intended for constructing filenames. However you can play a trick; here’s an example of a way to use join that gives you the output you are looking for:
If you think your lists might contain
^characters then choose something else. Let me know if you need this unpacked/explained.