On Wed, 28 Nov 2007, Martin Dorey wrote:
http://www.gnu.org/software/make/manual/make.html#Makefile-Basics
suggests you follow your final suggestion, as you (seem to) have a
$(srcdir) variable. It suggests ./ otherwise, although I've tripped
over doing that and generally use $(CURDIR)/ myself.
Thanks for the link; I knew I'd read something like that before.
It's helpful elsewhere that ./file and file are considered to be the
same file.
Its nice that the two are considered the same -- when we are determining
dependencies. It is not so nice when this changes the command line.
It still seems reasonable to expect that
cat <<_EOF > Makefile
test.out: $(srcdir)/script.sh
$< > $@
_EOF
should work in all cases -- not just when '.' is in $PATH or $(srcdir) is
other than '.'. Though I guess
cat <<_EOF > Makefile
test.out: script.sh
$(srcdir)/$< > $@
_EOF
isn't too bad, now that I know to use it.
If it is decided that canonicalization of automatic variables is The Right
Thing(TM), then their section in the manual should probably be updated to
make that clear. Having read that section a few times, I never guessed
they were being filtered.
http://www.gnu.org/software/make/manual/html_node/Automatic-Variables.html
It would also be good to close the relevant bug reports as "invalid" or
"won't fix" and leave a note as to the correct makefile syntax (e.g. use
$(srcdir) in the rules; not in the prerequisites).
Later,
Daniel
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Wednesday, November 28, 2007 12:53
To: bug-make@gnu.org
Subject: canonicalization/stripping of leading ./
Here's an example makefile:
cat <<_EOF > Makefile
test.out: ./script.sh
$< > $@
_EOF
Now when I run make, it executes
`script.sh > test.out`
instead of
`./script.sh > test.out`
This is all fine when 'PATH=.:<stuff>', and sometimes acceptable when
'PATH=<stuff>:.'; but in the general case, its very bad.
I'm working around this by changing my makefiles to
cat <<_EOF > Makefile
test.out: ./script.sh
./$< > $@
_EOF
but that doesn't seem too good either; maybe it should always be
cat <<_EOF > Makefile
test.out: $(srcdir)/script.sh
$(srcdir)/$< > $@
_EOF
??
Bug reports #15338 and #17230 cover this same issue, but I haven't seen
any followup, neither on Savannah nor on these lists.
The closest discussion I could find was #10708, mentioned in
http://lists.gnu.org/archive/html/help-make/2006-03/msg00231.html
What's the official scoop? Are there plans to fix/change this behavior?
In the meantime, how should I code the above Makefile (where an output
file should be rebuilt whenever its script changes)?
Thanks,
Daniel
_______________________________________________
Bug-make mailing list
Bug-make@gnu.org
http://lists.gnu.org/mailman/listinfo/bug-make
