It works great, but I don't fully understand why. It even works better than specified in my post, because I want the compiled SDK files in a subdirectory. This is my working test dummy:
default: all
all: exe
clean:
rm -f foo.obj bar.obj sdk-objects/baz.obj main.obj exe
%.obj: $(filter %.src,$<)
@mkdir -p "$(dir $@)"
@echo "Compile $< to $@"
cat $< > $@
exe: main.obj foo.obj bar.obj sdk-objects/baz.obj
@echo link $^ to $@
cat $^ > $@
main.obj: main.src
foo.obj: subdir/foo.src
bar.obj: subdir/bar.src
sdk-objects/baz.obj: /tmp/baz.src
It just does what I mean! But how does it work? The filter function should just return $< - but at that point, the filter function has processed the source pattern %.src, so the rule is no longer a simple pattern rule. And then, something magic happens ... ;-)
Alexander
--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)
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