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Make: Filtering prerequisites


From: Smirnov Dmitry
Subject: Make: Filtering prerequisites
Date: Fri, 7 Apr 2006 14:06:31 +0400

Hi,

I'm trying to implement the following in the make file:
Suppose I have few source files. I can create the list of targets corresponding 
to each source. 
I need to create the rule which builds the targets from sources.
Here is the example:
SOURCES := \
  dir1/subdir1/file1 \
  dir2/subdir2/file2 

TEST:=file3

TARGETS = $(addprefix dir3/subdir3/, $(notdir $(SOURCES)))

$(TARGETS): dir3/subdir3/% : $(foreach src,$(SOURCES),$(if $(findstring 
$(notdir $(src)),%),$(src), Notfound)
            echo 'target: $@, source: $<'

all: $(TARGETS)

Do not be surprised with the rule: I've tried a lot of versions (much simpler 
than this one) but no one works. It looks that if I use the stem (%) or even 
the SysV $$(@F) neither $(filter) nor $(findstring) works.

For example, if I write 

$(TARGETS): $(filter %$$(@F), anystring/$$(@F)  anystring2/$$(@F)  ) it works, 
make produses the following:
make -k all 
make: *** No rule to make target `anystring/file1', needed by 
`dir3/subdir3/file1'.
make: *** No rule to make target `anystring2/file1', needed by 
`dir3/subdir3/file1'.
make: *** No rule to make target `anystring/file2', needed by 
`dir3/subdir3/file2'.
make: *** No rule to make target `anystring2/file2', needed by 
`dir3/subdir3/file2'.
make: Target `all' not remade because of errors.

But it fails if I replace it with 

$(TARGETS): $(filter %$$(@F), $(SOURCES) )

make -k all 
echo 'target: dir3/subdir3/file1, source: '
target: dir3/subdir3/file1, source: 
echo 'target: dir3/subdir3/file2, source: '
target: dir3/subdir3/file2, source:

Why it is so???!!!

If such filtering is impossible, could you please advice the method to 
implement my goal...

Dmitry





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