On Fri, 29 May 2009, Yavor Doganov wrote:
Francois Gouget wrote:
But let's say we have something like this:
%.o: %.c foo.h
some command
Now N.o would still depend on N.c and ultimately on N.y, but it would
also depend on foo.h. And you're telling me that because of this
Here is a simplified Makefile showing this bug:
cat Makefile EOF
%.bar: %.c foo.h
cat $^ $@ || rm $@
foo.h: foo.h.in
cat $^ $@ || rm $@
EOF
cat main.y EOF
%%
command:
q { return 1; }
;
%%
EOF
echo bar foo.h.in
# Again the initial build is
Francois Gouget wrote:
Make in fact sees the first prerequisite of your rule, and knows how
to rebuild it...
What does this have to do with things being parallel or not?
Nothing, indeed. It should have nothing to do with that; it seems
that during the dependency check with -j2 make
Package: make
Version: 3.81-5
Severity: normal
I stumbled on a problem with make -j2. Here is how to reproduce the problem:
# First create some files:
cat Makefile EOF
ALL=foo bar and much more
build-%/lib.so: build-%/rsrc.res build-%/main.o
cat $^ $@ || rm $@
# .SECONDARY:
(Note: I'm not the Debian `make' package maintainer, just a random
user.)
On Thu, May 28, 2009 at 11:32:23AM +0200, Francois Gouget wrote:
# - make forgot to rebuild the build-foo/rsrc.res intermediate file!
No, make just (rightfully) considered it exists. Your snippet is a
classic example
On Thu, 28 May 2009, Yavor Doganov wrote:
(Note: I'm not the Debian `make' package maintainer, just a random
user.)
On Thu, May 28, 2009 at 11:32:23AM +0200, Francois Gouget wrote:
# - make forgot to rebuild the build-foo/rsrc.res intermediate file!
No, make just (rightfully)
On Thu, May 28, 2009 at 05:04:30PM +0200, Francois Gouget wrote:
build-%/rsrc.res: build-%/rsrc.rc build-%/main.o
cat $ $@ || rm $@
I don't understand you here.
Let me try to help you understand: The equivalent of your example if we
don't take into account the complexity of pattern
On Thu, 28 May 2009, Yavor Doganov wrote:
[...]
This works perfectly well with parallel make, because these are not
pattern rules. You are assuming that make behaves exactly in the same
logical way with pattern rules, which is not the case.
Note that I already stated that lib.so
On Thu, May 28, 2009 at 06:10:01PM +0200, Francois Gouget wrote:
On Thu, 28 May 2009, Yavor Doganov wrote:
Yes, but you have not stated any order of these prerequisites [...]
That's were you lost me.
Sorry, my explanation was confusing. Make treats intermediate files
differently and does
On Thu, 28 May 2009, Yavor Doganov wrote:
[...]
Doesn't the above rule mean that before rebuilding lib.so we must have
both build-%/rsrc.res and build-%/main.o?
In general -- yes, but this is not guaranteed. Make simply decides it
can go on without rsrc.res here:
, (make)Chained
Francois Gouget wrote:
But let's say we have something like this:
%.o: %.c foo.h
some command
Now N.o would still depend on N.c and ultimately on N.y, but it would
also depend on foo.h. And you're telling me that because of this extra
dependency, make would be right to try to
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