Static Pattern Rules and Filter --- errors: are they intentional

[tiborh]

When trying this in a Makefile:

obj_files = foo.result bar.o lose.o
src_files = foo.raw bar.c lose.c

all: $(obj_files)

$(filter %.o,$(obj_files)): %.o: %.c
echo "target: $@ prereq: $<"
$(filter %.result,$(obj_files)): %.result: %.raw
echo "target: $@ prereq: $<"

%.c %.raw:
touch $@

clean:
rm -f $(src_files)`

I get the following output:

$ make
touch foo.raw
echo "target: foo.result prereq: foo.raw"
target: foo.result prereq: foo.raw
touch bar.c
echo "target: bar.o prereq: bar.c"
target: bar.o prereq: bar.c
touch lose.c
echo "target: lose.o prereq: lose.c"
target: lose.o prereq: lose.c
touch all.c
cc -c -o all.o all.c
cc all.o foo.result bar.o lose.o -o all
cc: error: foo.result: No such file or directory
cc: error: bar.o: No such file or directory
cc: error: lose.o: No such file or directory
make: *** [: all] Error 1
rm all.o all.c

Is this intended output?

[theicfire]

Oof! Try adding .PHONY: all above the all: line. Like this:

obj_files = foo.result bar.o lose.o
src_files = foo.raw bar.c lose.c

.PHONY: all
all: $(obj_files)

$(filter %.o,$(obj_files)): %.o: %.c
	echo "target: $@ prereq: $<"
$(filter %.result,$(obj_files)): %.result: %.raw
	echo "target: $@ prereq: $<"

%.c %.raw:
	touch $@

clean:
	rm -f $(src_files)

Does that fix it for you?

[theicfire]

Should be fixed by e457b8d unless you're also noticing a second issue here.

[tiborh]

Thank you. Yes, that solves it.
Output:

$ make
touch foo.raw
echo "target: foo.result prereq: foo.raw" 
target: foo.result prereq: foo.raw
touch bar.c
echo "target: bar.o prereq: bar.c"
target: bar.o prereq: bar.c
touch lose.c
echo "target: lose.o prereq: lose.c"
target: lose.o prereq: lose.c

Files in directory:

$ ls
bar.c  foo.raw  lose.c  Makefile

(make clean successfully restores original state)

[theicfire]

Great, thanks for letting me know!