GNU make doc - 3.8
2024-10-08 06:11:53
Note that the directory prefix (D), as described in Implicit Rule Search Algorithm, is appended (after expansion) to all the patterns in the prerequisites list. As an example:
.SECONDEXPANSION: /tmp/foo.o: %.o: $$(addsuffix /%.c,foo bar) foo.h
@echo $^
The prerequisite list printed, after the secondary expansion and directory prefix reconstruction, will be /tmp/foo/foo.c /tmp/bar/foo.c foo.h. If you are not interested in this reconstruction, you can use $$*
instead of %
in the prerequisites list.
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