I am having a problem with a makefile which appears to be a bug with
make. Unfortunately, I can't compile make from CVS because of problems
with automake on Fedora Core 4. I have tried this with the 3.81beta2
release though.
I have attached the makefile in question. To run the test, first make
setup. This will create a list of source files and a dependency in a
subdirectory. Next make the level4 target. Make complain about circular
dependencies on dep.x. I don't see how this dependency is circular. On
make 3.80, if you define funny to be 1 (make -f foo.mk level4 funny=1)
the problem goes away. Not so with 3.81beta2. Also, if you change the
target for %.3 or %.4 to depend on depdir/dep.x rather than picking it
up from the vpath then everything works.
Can anyone shed some light on this?
Thanks,
-Pete
files = a.1 b.1 c.1 d.1
setup:
mkdir -p depdir
touch $(files) depdir/dep.x
command = echo $^ > $@
%.2: %.1 dep.x
$(command)
%.3: %.2 dep.x
$(command)
%.4: %.3
$(command)
level4: $(files:.1=.4)
ifeq ($(funny),1)
level3: $(files:.1=.3)
endif
clean:
rm -f $(files:.1=.2) $(files:.1=.3) $(files:.1=.4)
.PHONY: level4
vpath %.x depdir
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