unexport doesn't seem to work for me:
$ cat A
unexport FOO
all:
$(MAKE) -f B
$ cat B
all:
echo $(FOO)
$ make --no-print-directory -f A FOO=hello
make -f B
echo hello
hello
$
As I understand it, the "unexport" in A should prevent FOO from being
exported to B, so $(FOO) in B should expand to the empty string.
Am I doing something wrong, or is this a bug in make? I'm using:
$ make -v
GNU Make 3.81
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
This program built for i486-pc-linux-gnu
... on Debian lenny.
Thanks,
Jay.
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