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asdmin
Asked: 2010-03-05 07:18:31 +0800 CST

makefile shell pattern expansion: how to?

  • 772

I have found an interesting "feature" of make

DIR_INPUT=/test
test:
        # testing date (it should be yesterday)
        test ! -z "${DATE}"
        ls -lad ${DIR_INPUT}/{a,c}

but it seems to work in a strange way:

PROMPT# make test
# testing date (it should be yesterday)
test ! -z "20100120"
ls -lad /test/{a,c}
/test/{a,c}: No such file or directory
*** Error code 2
make: Fatal error: Command failed for target `test'
PROMPT#

of course if I issue ls -lad /test/{a,c} from my shell works.

Question: how can I get make to evaluate this pattern as the shell would do?

linux shell pattern-matching

1 Answers

  1. Best Answer

    You can do this using the shell function, $(shell touch {a..c}), (Maybe the wildcard function as well?):

    kbrandt@kbrandt-opadmin:~/scrap/make$ ls
foo
kbrandt@kbrandt-opadmin:~/scrap/make$ vim foo
kbrandt@kbrandt-opadmin:~/scrap/make$ ls
foo
kbrandt@kbrandt-opadmin:~/scrap/make$ cat foo
files:
    $(shell touch {a..c})
kbrandt@kbrandt-opadmin:~/scrap/make$ make -f foo
make: `files' is up to date.
kbrandt@kbrandt-opadmin:~/scrap/make$ ls
a  b  c  foo
kbrandt@kbrandt-opadmin:~/scrap/make$
    • 4