How to exclude one list of files from another in Make?

Question

GNU Make

There is a list of files
OBJFILES=f1 f2 f3 f4 f5 f6 f7
And there is another list of files
OBJFREEFILES=f2 f3 f5 f7
I need to cut out all the files contained in the first list from the first list, that is, I should get:
OBJFILES=f1 f4 f6
Just I cannot cut one line from another, because the order of files in FREE is different.
How to achieve this?

Answer 1

res2001's answer probably fits, but the filter-out function I found does just that.